PCS2020 - PHP Além do Síncrono

Apresentada durante o PHP Community Summit de 2020.

Quando tudo era mato, ninguém acreditava que a linguagem PHP poderia ser usada para nada além da execução de scripts simples, sites ou um CMS de código bem bagunçado.
Então o mundo mudou e hoje temos grandes frameworks, sistemas corporativos, grandes portais e redes sociais e até sistemas de segurança e pagamentos escritos em PHP.
Agora, a comunidade se debruça sobre o novo hype (ou seria necessidade?): processamento assíncrono e paralelo.
Nessa apresentação, vamos entender a difereça entre async e paralelo, como podemos trabalhar com isso usando PHP (inclusive nativamente) e quais as principais diferenças entre as soluções mais hypadas (digo, famosas) do momento.

Transcript

1. PHP Além do Síncrono
   O reino mágico do processamento async e paralelo
   

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2. @dianaarnos
   Dev, Sec, Music, Kung Fu.
   PHP Engineer @ Usabilla (Amsterdã, Holanda) (soon)
   Evangelista @ PHPSP
   Evangelista @ PHPWomenBR
   

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3. View Slide

4. PHP é síncrono
   

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5. PHP é síncrono
   Mas dá pra trabalhar
   assíncrono
   

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6. PHP é síncrono
   Mas dá pra trabalhar
   assíncrono
   Não é pra isso
   que serve!
   

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7. PHP é síncrono
   Mas dá pra trabalhar
   assíncrono
   Não é pra isso
   que serve!
   Se funciona,
   então serve
   

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8. PHP é síncrono
   Mas dá pra trabalhar
   assíncrono
   Não é pra isso
   que serve!
   Se funciona,
   então serve
   M
   AS
   E
   O
   SHARE
   NOTHING?!
   

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9. PHP é síncrono
   Mas dá pra trabalhar
   assíncrono
   Não é pra isso
   que serve!
   Se funciona,
   então serve
   M
   AS
   E
   O
   SHARE
   NOTHING?!
   M
   AS
   É
   O
   UTRO
   CO
   NTEXTO
   !
   

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10. View Slide

11. Calma, xovem. É muita emoção.
    

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12. View Slide

13. Síncrono
    Requests
    Tempo
    Task #1
    Task #2
    Task #3
    

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14. Assíncrono
    Requests
    Tempo
    Task #1
    Task #2
    Task #3
    Task #1
    Task #3
    

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15. Paralelo
    Requests
    Tempo
    Task #1
    Task #2
    Task #3
    Task #1
    Task #3
    Task #2
    Task #1
    Task #2
    Task #3
    

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16. Paralelismo e Assíncronismo = Concorrência
    

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17. Concorrência no PHP?
    

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21. Ext Parallel
    

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22. Ext Parallel - ZTS
    

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23. use parallel\Runtime;
    $runtime = new Runtime();
    $future = $runtime->run(function(){
    for ($i = 0; $i < 100; $i++)
    echo "*";
    return "fácil";
    });
    for ($i = 0; $i < 100; $i++) {
    echo ".";
    }
    printf("\nUsar o \\parallel\\Runtime é %s\n", $future->value());
    

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24. Parallel x Swoole
    Swoole implements co-operative multi-tasking, and if you were following along, you
    already figured out that this is not based on parallel concurrency, but on
    asynchronous concurrency. When the readme says "you can think of co-routines as
    individual threads", it's referring to green threads. No user code is executed in
    parallel, it is executed asynchronously. The internals of swoole does use threads
    but to service I/O, not to execute user code.
    - Joe Watkins (krakjoe)
    

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25. PHP é síncrono. Realmente.
    

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26. echo PHP_EOL . "Step 1" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Step 2" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Finish." . PHP_EOL;
    

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27. echo PHP_EOL . "Step 1" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Step 2" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Finish." . PHP_EOL;
    

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28. echo PHP_EOL . "Step 1" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Step 2" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Finish." . PHP_EOL;
    

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29. echo PHP_EOL . "Step 1" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Step 2" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Finish." . PHP_EOL;
    

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30. echo PHP_EOL . "Step 1" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Step 2" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Finish." . PHP_EOL;
    

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31. echo PHP_EOL . "Step 1" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Step 2" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Finish." . PHP_EOL;
    

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32. echo PHP_EOL . "Step 1" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Step 2" . PHP_EOL;
    for ($i = 0; $i <11; $i++) {
    echo ".";
    }
    echo PHP_EOL . "Finish." . PHP_EOL;
    

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33. Mas dá pra ser assíncrono também.
    

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34. Mas dá pra ser assíncrono também.
    Nativo.
    

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35. View Slide

36. Olá, generators!
    

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37. $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL . "Generator's end."
    ;
    };
    

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38. $generator = $function();
    echo PHP_EOL . "Main flow";
    echo $generator->current();
    echo PHP_EOL . "Main flow";
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow";
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() . PHP_EOL;
    echo PHP_EOL . "Main flow";
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL . "Generator's end."
    ;
    };
    

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39. $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    

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40. $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    

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41. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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42. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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43. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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44. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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45. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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46. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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47. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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48. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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49. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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50. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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51. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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52. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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53. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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54. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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55. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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56. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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57. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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58. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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59. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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60. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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61. $generator = $function();
    echo PHP_EOL . "Main flow" ;
    echo $generator->current();
    echo PHP_EOL . "Main flow" ;
    $generator->next();
    echo $generator->current();
    $generator->next();
    echo PHP_EOL . "Main flow" ;
    $generator->send("aeeewww");
    $generator->next();
    echo $generator->getReturn() .
    PHP_EOL;
    echo PHP_EOL . "Main flow" ;
    $function = function ()
    {
    yield PHP_EOL . "Starting";
    echo PHP_EOL . "-";
    yield PHP_EOL . ".";
    $incoming = yield;
    echo PHP_EOL . $incoming;
    return PHP_EOL .
    "Generator's end.";
    };
    

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62. Prazer, corrotina.
    

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63. Mas… e requests?
    

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64. cURL
    

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65. cURL
    

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66. curl_multi_*
    

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67. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

68. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

69. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

70. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

71. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

72. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

73. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

74. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

75. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

76. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

77. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

78. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

79. $urls = ["http://dummy.restapiexample.com/api/v1/employee/1"
    , "http://dummy.restapiexample.com/api/v1/employee/2"
    ,];
    $multiHandle = curl_multi_init()
    ;
    $curls = [];
    $results = [];
    $callback = function ($data) {
    echo $data . PHP_EOL;
    };
    foreach ($urls as $url) {
    $handle = curl_init()
    ;
    curl_setopt_array(
    $handle, [CURLOPT_URL => $url, CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false]);
    $curls[$url] = $handle;
    curl_multi_add_handle(
    $multiHandle
    , $handle);
    }
    $isRunning = null;
    do {
    $multiCurlStatus = curl_multi_exec(
    $multiHandle
    , $isRunning);
    $resource = curl_multi_info_read(
    $multiHandle
    );
    if ($resource) {
    $callback(curl_multi_getcontent(
    $resource['handle']));
    curl_multi_remove_handle(
    $multiHandle
    , $resource['handle']);
    }
    } while ($multiCurlStatus == CURLM_CALL_MULTI_PERFORM || $isRunning);
    

    View Slide

80. View Slide

81. Concorrência assíncrona :)
    

    View Slide

82. Mas tem mais!
    

    View Slide

83. I/O multiplexing com… stream_select
    

    View Slide

84. $host = "dummy.restapiexample.com";
    $resource = [
    "api/v1/employee/1",
    "api/v1/employee/2",
    ];
    $clients = [];
    foreach ($resource as $url) {
    $socketClient = stream_socket_client(
    'tcp://' . $host . ':80',
    $errno,
    $errstr,
    10,
    STREAM_CLIENT_ASYNC_CONNECT
    );
    $clients[$url] = $socketClient;
    $request = "GET /" . $url . " HTTP/1.1" . PHP_EOL . "Host: " . $host . PHP_EOL . PHP_EOL;
    fwrite($socketClient, $request);
    stream_set_blocking($socketClient, 0);
    }
    stream_select($clients, $write, $ex, 10);
    if (count($clients)) {
    foreach ($clients as $id => $socket) {
    echo fread($socket, 2000);
    }
    }
    

    View Slide

85. $host = "dummy.restapiexample.com";
    $resource = [
    "api/v1/employee/1",
    "api/v1/employee/2",
    ];
    $clients = [];
    foreach ($resource as $url) {
    $socketClient = stream_socket_client(
    'tcp://' . $host . ':80',
    $errno,
    $errstr,
    10,
    STREAM_CLIENT_ASYNC_CONNECT
    );
    $clients[$url] = $socketClient;
    $request = "GET /" . $url . " HTTP/1.1" . PHP_EOL . "Host: " . $host . PHP_EOL . PHP_EOL;
    fwrite($socketClient, $request);
    stream_set_blocking($socketClient, 0);
    }
    stream_select($clients, $write, $ex, 10);
    if (count($clients)) {
    foreach ($clients as $id => $socket) {
    echo fread($socket, 2000);
    }
    }
    

    View Slide

86. $host = "dummy.restapiexample.com";
    $resource = [
    "api/v1/employee/1",
    "api/v1/employee/2",
    ];
    $clients = [];
    foreach ($resource as $url) {
    $socketClient = stream_socket_client(
    'tcp://' . $host . ':80',
    $errno,
    $errstr,
    10,
    STREAM_CLIENT_ASYNC_CONNECT
    );
    $clients[$url] = $socketClient;
    $request = "GET /" . $url . " HTTP/1.1" . PHP_EOL . "Host: " . $host . PHP_EOL . PHP_EOL;
    fwrite($socketClient, $request);
    stream_set_blocking($socketClient, 0);
    }
    stream_select($clients, $write, $ex, 10);
    if (count($clients)) {
    foreach ($clients as $id => $socket) {
    echo fread($socket, 2000);
    }
    }
    

    View Slide

87. $host = "dummy.restapiexample.com";
    $resource = [
    "api/v1/employee/1",
    "api/v1/employee/2",
    ];
    $clients = [];
    foreach ($resource as $url) {
    $socketClient = stream_socket_client(
    'tcp://' . $host . ':80',
    $errno,
    $errstr,
    10,
    STREAM_CLIENT_ASYNC_CONNECT
    );
    $clients[$url] = $socketClient;
    $request = "GET /" . $url . " HTTP/1.1" . PHP_EOL . "Host: " . $host . PHP_EOL . PHP_EOL;
    fwrite($socketClient, $request);
    stream_set_blocking($socketClient, 0);
    }
    stream_select($clients, $write, $ex, 10);
    if (count($clients)) {
    foreach ($clients as $id => $socket) {
    echo fread($socket, 2000);
    }
    }
    

    View Slide

88. $host = "dummy.restapiexample.com";
    $resource = [
    "api/v1/employee/1",
    "api/v1/employee/2",
    ];
    $clients = [];
    foreach ($resource as $url) {
    $socketClient = stream_socket_client(
    'tcp://' . $host . ':80',
    $errno,
    $errstr,
    10,
    STREAM_CLIENT_ASYNC_CONNECT
    );
    $clients[$url] = $socketClient;
    $request = "GET /" . $url . " HTTP/1.1" . PHP_EOL . "Host: " . $host . PHP_EOL . PHP_EOL;
    fwrite($socketClient, $request);
    stream_set_blocking($socketClient, 0);
    }
    stream_select($clients, $write, $ex, 10);
    if (count($clients)) {
    foreach ($clients as $id => $socket) {
    echo fread($socket, 2000);
    }
    }
    

    View Slide

89. $host = "dummy.restapiexample.com";
    $resource = [
    "api/v1/employee/1",
    "api/v1/employee/2",
    ];
    $clients = [];
    foreach ($resource as $url) {
    $socketClient = stream_socket_client(
    'tcp://' . $host . ':80',
    $errno,
    $errstr,
    10,
    STREAM_CLIENT_ASYNC_CONNECT
    );
    $clients[$url] = $socketClient;
    $request = "GET /" . $url . " HTTP/1.1" . PHP_EOL . "Host: " . $host . PHP_EOL . PHP_EOL;
    fwrite($socketClient, $request);
    stream_set_blocking($socketClient, 0);
    }
    stream_select($clients, $write, $ex, 10);
    if (count($clients)) {
    foreach ($clients as $id => $socket) {
    echo fread($socket, 2000);
    }
    }
    

    View Slide

90. $host = "dummy.restapiexample.com";
    $resource = [
    "api/v1/employee/1",
    "api/v1/employee/2",
    ];
    $clients = [];
    foreach ($resource as $url) {
    $socketClient = stream_socket_client(
    'tcp://' . $host . ':80',
    $errno,
    $errstr,
    10,
    STREAM_CLIENT_ASYNC_CONNECT
    );
    $clients[$url] = $socketClient;
    $request = "GET /" . $url . " HTTP/1.1" . PHP_EOL . "Host: " . $host . PHP_EOL . PHP_EOL;
    fwrite($socketClient, $request);
    stream_set_blocking($socketClient, 0);
    }
    stream_select($clients, $write, $ex, 10);
    if (count($clients)) {
    foreach ($clients as $id => $socket) {
    echo fread($socket, 2000);
    }
    }
    

    View Slide

91. $host = "dummy.restapiexample.com";
    $resource = [
    "api/v1/employee/1",
    "api/v1/employee/2",
    ];
    $clients = [];
    foreach ($resource as $url) {
    $socketClient = stream_socket_client(
    'tcp://' . $host . ':80',
    $errno,
    $errstr,
    10,
    STREAM_CLIENT_ASYNC_CONNECT
    );
    $clients[$url] = $socketClient;
    $request = "GET /" . $url . " HTTP/1.1" . PHP_EOL . "Host: " . $host . PHP_EOL . PHP_EOL;
    fwrite($socketClient, $request);
    stream_set_blocking($socketClient, 0);
    }
    stream_select($clients, $write, $ex, 10);
    if (count($clients)) {
    foreach ($clients as $id => $socket) {
    echo fread($socket, 2000);
    }
    }
    

    View Slide

92. MAIS AINDA!
    

    View Slide

93. MAIS AINDA!
    Eventos com stream context
    

    View Slide

94. public function download
    ()
    {
    $context = stream_context_create()
    ;
    stream_context_set_params(
    $context
    , ['notification' => [Downloader::
    class, 'streamCallback'
    ]]);
    $handler = fopen(
    $this->youtube->getUrl(), 'r', false, $context
    );
    if (!$handler
    ) {
    throw new \InvalidArgumentException(
    "Unable to download from link "
    . $this->youtube->getUrl());
    }
    file_put_contents(
    $this->youtube->getName(), $handler
    );
    }
    public function streamCallback
    ($notification_code
    , $severity
    , $message
    , $message_code
    , $bytes_transfered
    , $bytes_max
    )
    {
    static $filesize = null;
    switch ($notification_code
    ) {
    case STREAM_NOTIFY_RESOLVE:
    case STREAM_NOTIFY_AUTH_REQUIRED:
    case STREAM_NOTIFY_COMPLETED:
    case STREAM_NOTIFY_FAILURE:
    case STREAM_NOTIFY_AUTH_RESULT:
    break;
    case STREAM_NOTIFY_REDIRECTED:
    echo "Being redirected to: " . $message . PHP_EOL;
    break;
    case STREAM_NOTIFY_CONNECT:
    echo "Connected!" . PHP_EOL;
    case STREAM_NOTIFY_FILE_SIZE_IS:
    $filesize = $bytes_max
    ;
    echo "Filesize: " . $filesize . PHP_EOL;
    case STREAM_NOTIFY_MIME_TYPE_IS:
    echo "Mime-type: " . $message . PHP_EOL;
    case STREAM_NOTIFY_PROGRESS:
    if ($bytes_transfered > 0) {
    $length = (int)(($bytes_transfered / $filesize
    ) * 100);
    printf("\r[%-100s] %d%% (%2d/%2d mb)"
    , str_repeat(
    "=", $length) . ">", $length, ($bytes_transfered / 1024 / 1024), $filesize / 1024 / 1024);
    }
    break;
    }
    }
    

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95. public function download
    ()
    {
    $context = stream_context_create()
    ;
    stream_context_set_params(
    $context
    , ['notification' => [Downloader::
    class, 'streamCallback'
    ]]);
    $handler = fopen(
    $this->youtube->getUrl(), 'r', false, $context
    );
    if (!$handler
    ) {
    throw new \InvalidArgumentException(
    "Unable to download from link "
    . $this->youtube->getUrl());
    }
    file_put_contents(
    $this->youtube->getName(), $handler
    );
    }
    public function streamCallback
    ($notification_code
    , $severity
    , $message
    , $message_code
    , $bytes_transfered
    , $bytes_max
    )
    {
    static $filesize = null;
    switch ($notification_code
    ) {
    case STREAM_NOTIFY_RESOLVE:
    case STREAM_NOTIFY_AUTH_REQUIRED:
    case STREAM_NOTIFY_COMPLETED:
    case STREAM_NOTIFY_FAILURE:
    case STREAM_NOTIFY_AUTH_RESULT:
    break;
    case STREAM_NOTIFY_REDIRECTED:
    echo "Being redirected to: " . $message . PHP_EOL;
    break;
    case STREAM_NOTIFY_CONNECT:
    echo "Connected!" . PHP_EOL;
    case STREAM_NOTIFY_FILE_SIZE_IS:
    $filesize = $bytes_max
    ;
    echo "Filesize: " . $filesize . PHP_EOL;
    case STREAM_NOTIFY_MIME_TYPE_IS:
    echo "Mime-type: " . $message . PHP_EOL;
    case STREAM_NOTIFY_PROGRESS:
    if ($bytes_transfered > 0) {
    $length = (int)(($bytes_transfered / $filesize
    ) * 100);
    printf("\r[%-100s] %d%% (%2d/%2d mb)"
    , str_repeat(
    "=", $length) . ">", $length, ($bytes_transfered / 1024 / 1024), $filesize / 1024 / 1024);
    }
    break;
    }
    }
    

    View Slide

96. public function download
    ()
    {
    $context = stream_context_create()
    ;
    stream_context_set_params(
    $context
    , ['notification' => [Downloader::
    class, 'streamCallback'
    ]]);
    $handler = fopen(
    $this->youtube->getUrl(), 'r', false, $context
    );
    if (!$handler
    ) {
    throw new \InvalidArgumentException(
    "Unable to download from link "
    . $this->youtube->getUrl());
    }
    file_put_contents(
    $this->youtube->getName(), $handler
    );
    }
    public function streamCallback
    ($notification_code
    , $severity
    , $message
    , $message_code
    , $bytes_transfered
    , $bytes_max
    )
    {
    static $filesize = null;
    switch ($notification_code
    ) {
    case STREAM_NOTIFY_RESOLVE:
    case STREAM_NOTIFY_AUTH_REQUIRED:
    case STREAM_NOTIFY_COMPLETED:
    case STREAM_NOTIFY_FAILURE:
    case STREAM_NOTIFY_AUTH_RESULT:
    break;
    case STREAM_NOTIFY_REDIRECTED:
    echo "Being redirected to: " . $message . PHP_EOL;
    break;
    case STREAM_NOTIFY_CONNECT:
    echo "Connected!" . PHP_EOL;
    case STREAM_NOTIFY_FILE_SIZE_IS:
    $filesize = $bytes_max
    ;
    echo "Filesize: " . $filesize . PHP_EOL;
    case STREAM_NOTIFY_MIME_TYPE_IS:
    echo "Mime-type: " . $message . PHP_EOL;
    case STREAM_NOTIFY_PROGRESS:
    if ($bytes_transfered > 0) {
    $length = (int)(($bytes_transfered / $filesize
    ) * 100);
    printf("\r[%-100s] %d%% (%2d/%2d mb)"
    , str_repeat(
    "=", $length) . ">", $length, ($bytes_transfered / 1024 / 1024), $filesize / 1024 / 1024);
    }
    break;
    }
    }
    

    View Slide

97. public function download
    ()
    {
    $context = stream_context_create()
    ;
    stream_context_set_params(
    $context
    , ['notification' => [Downloader::
    class, 'streamCallback'
    ]]);
    $handler = fopen(
    $this->youtube->getUrl(), 'r', false, $context
    );
    if (!$handler
    ) {
    throw new \InvalidArgumentException(
    "Unable to download from link "
    . $this->youtube->getUrl());
    }
    file_put_contents(
    $this->youtube->getName(), $handler
    );
    }
    public function streamCallback
    ($notification_code
    , $severity
    , $message
    , $message_code
    , $bytes_transfered
    , $bytes_max
    )
    {
    static $filesize = null;
    switch ($notification_code
    ) {
    case STREAM_NOTIFY_RESOLVE:
    case STREAM_NOTIFY_AUTH_REQUIRED:
    case STREAM_NOTIFY_COMPLETED:
    case STREAM_NOTIFY_FAILURE:
    case STREAM_NOTIFY_AUTH_RESULT:
    break;
    case STREAM_NOTIFY_REDIRECTED:
    echo "Being redirected to: " . $message . PHP_EOL;
    break;
    case STREAM_NOTIFY_CONNECT:
    echo "Connected!" . PHP_EOL;
    case STREAM_NOTIFY_FILE_SIZE_IS:
    $filesize = $bytes_max
    ;
    echo "Filesize: " . $filesize . PHP_EOL;
    case STREAM_NOTIFY_MIME_TYPE_IS:
    echo "Mime-type: " . $message . PHP_EOL;
    case STREAM_NOTIFY_PROGRESS:
    if ($bytes_transfered > 0) {
    $length = (int)(($bytes_transfered / $filesize
    ) * 100);
    printf("\r[%-100s] %d%% (%2d/%2d mb)"
    , str_repeat(
    "=", $length) . ">", $length, ($bytes_transfered / 1024 / 1024), $filesize / 1024 / 1024);
    }
    break;
    }
    }
    

    View Slide

98. public function download
    ()
    {
    $context = stream_context_create()
    ;
    stream_context_set_params(
    $context
    , ['notification' => [Downloader::
    class, 'streamCallback'
    ]]);
    $handler = fopen(
    $this->youtube->getUrl(), 'r', false, $context
    );
    if (!$handler
    ) {
    throw new \InvalidArgumentException(
    "Unable to download from link "
    . $this->youtube->getUrl());
    }
    file_put_contents(
    $this->youtube->getName(), $handler
    );
    }
    public function streamCallback
    ($notification_code
    , $severity
    , $message
    , $message_code
    , $bytes_transfered
    , $bytes_max
    )
    {
    static $filesize = null;
    switch ($notification_code
    ) {
    case STREAM_NOTIFY_RESOLVE:
    case STREAM_NOTIFY_AUTH_REQUIRED:
    case STREAM_NOTIFY_COMPLETED:
    case STREAM_NOTIFY_FAILURE:
    case STREAM_NOTIFY_AUTH_RESULT:
    break;
    case STREAM_NOTIFY_REDIRECTED:
    echo "Being redirected to: " . $message . PHP_EOL;
    break;
    case STREAM_NOTIFY_CONNECT:
    echo "Connected!" . PHP_EOL;
    case STREAM_NOTIFY_FILE_SIZE_IS:
    $filesize = $bytes_max
    ;
    echo "Filesize: " . $filesize . PHP_EOL;
    case STREAM_NOTIFY_MIME_TYPE_IS:
    echo "Mime-type: " . $message . PHP_EOL;
    case STREAM_NOTIFY_PROGRESS:
    if ($bytes_transfered > 0) {
    $length = (int)(($bytes_transfered / $filesize
    ) * 100);
    printf("\r[%-100s] %d%% (%2d/%2d mb)"
    , str_repeat(
    "=", $length) . ">", $length, ($bytes_transfered / 1024 / 1024), $filesize / 1024 / 1024);
    }
    break;
    }
    }
    

    View Slide

99. Forks?
    pnct_*
    

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100. $pid = pcntl_fork() ;
     if ($pid == -1) {
     die('could not fork' );
     } else if ($pid) {
     // we are the parent
     pcntl_wait($status); //Protect against Zombie children
     } else {
     // we are the child
     }
     

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101. Só funciona em Linux
     

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102. Só funciona em Linux
     Limitado ao número de CPUs
     

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103. Fork != Thread
     

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104. - Concorrência paralela
     

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105. - Concorrência paralela
     - Concorrência assíncrona
     

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106. - Concorrência paralela
     - Concorrência assíncrona
     - Eventos
     

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107. - Concorrência paralela
     - Concorrência assíncrona
     - Eventos
     - Paralelização
     

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108. View Slide

109. Você tem seu próprio ReactPHP, Amp,
     etc...
     

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110. Ahhhh, mas se fosse Java...
     

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111. O PHP também faz.
     

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112. REFERÊNCIAS
     http://bit.ly/pcs2020-ref
     

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113. SLIDES
     http://bit.ly/pcs2020-slides
     

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114. JOIND.IN
     https://joind.in/talk/43ab3
     

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115. OBRIGADA!
     Fale comigo: @dianaarnos
     

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