PHP73.pdf

Transcript

1. PHP 7.3
   

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2. !
   Christian Leo-Pernold
   "
   @mazedlx
   ⭐
   https://github.com/mazedlx
   $
   https://mazedlx.net
   2/23
   

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3. Agenda
   New Stuff
   !
   Depractions
   "
   Release Schedule
   #
   3/23
   

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4. New Stuff
   4/23
   

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5. Array Functions
   !
   $arr = [
   'a' => 'bob',
   'b' => 'jane',
   'c' => 'john',
   ];
   array_key_first($arr); // a
   array_key_last($arr); // c
   5/23
   

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6. is_countable()
   !
   $a = 'not-an-array';
   count($a); // gives warning
   if (is_countable($a)) { // better
   count($a);
   }
   6/23
   

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7. High-Resolution Time
   ⏱
   $timeAsInt = hrtime();
   /*
   array(2) {
   [0]=>
   int(27310)
   [1]=>
   int(349104398)
   }
   */
   $timeAsArray = hrtime($asInteger = true);
   // int(27310349207961)
   7/23
   

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8. Releaxed Heredoc / Nowdoc Syntax
   $awesomeText = <<In a hole in the ground there lived a hobbit.
   Not a nasty, dirty, wet hole, filled with the
   ends of worms and an oozy smell, nor yet a dry,
   bare, sandy hole with nothing in it to sit down
   on or to eat: it was a hobbit-hole, and that
   means comfort
   HOBBIT
   // finally some indentation
   8/23
   

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9. Trailing Commas In Function/Method Calls
   $bitcoins = mineForBitcoins(2.500, 8, ); // here
   function mineForBitcoins($amount, $cores) { // but not here
   ...
   }
   9/23
   

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10. json_encode()/json_decode() Can Throw Exceptions
    try {
    json_decode("{", $assoc = false, $depth = 512, JSON_THROW_ON_ERROR);
    } catch (\JsonException $exception) {
    echo $exception->getMessage(); // "Syntax error"
    }
    10/23
    

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11. References in list()
    !
    $array = ['bob', 'jane'];
    list($a, &$b) = $array;
    $b = 'john';
    echo $array[1]; // "john"
    11/23
    

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12. PCRE2
    !
    preg_match('/[\w-.]+/', ''); // throws compilation failed error
    // we need to escape the hyphen too
    preg_match('/[\w\-.]+/', ''); // ok
    12/23
    

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13. Argon2 Password Hash Enhancements ✳✳✳✳✳
    Argon2id is a hybrid of Argon2i and Argon2d.
    password_hash('super-secret', PASSWORD_ARGON2ID, $options = []);
    13/23
    

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14. Depracations
    14/23
    

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15. Depracate and remove image2wbmp()
    // fix: replace image2wbmp() with imagewbmp()
    15/23
    

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16. Undocumented mbstring function aliases
    //fix: use mb_ereg() instead of mbereg()
    16/23
    

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17. String search functions with integer needles
    $str = 'In a hole in the ground there lived 1 hobbit.';
    strpos($str, '1'); // int(36)
    strpos($str, 1); // bool(false)
    17/23
    

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18. Depracate case-insensitive constants
    define('Foo', 'Bar', $caseInsensitive = true); // throws a depracation notice
    define('Foo', 'Bar');
    echo Foo; // 'Bar'
    echo foo; // throws a depracation notice
    // By convention, constants should be all UPPERCASE
    18/23
    

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19. Depracate FILTER_FLAG_SCHEME_REQUIRED and
    FILTER_FLAG_HOST_REQUIRED with FILTER_VALIDATE_URL
    filter_var(
    $var,
    FILTER_VALIDATE_URL,
    FILTER_FLAG_SCHEME_REQUIRED,
    FILTER_FLAG_HOST_REQUIRED
    ) // throws depracation warning
    // fix
    filter_var($var, FILTER_VALIDATE_URL);
    19/23
    

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20. pdo_odbc.db2_instance_name directive
    As of PHP 5.1.1 pdo_odbc.db2_instance_name was marked as
    deprecated in the manual, promising removal in a future
    version of PHP. This ini directive modifies the DB2INSTANCE
    environment variable for non Windows operating systems,
    allowing pdo_odbc to make cataloged connections to a DB2
    database.
    20/23
    

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21. Release Schedule
    !
    Date Release
    Jun 07 2018 Alpha 1
    ... ...
    Jul 31 2018 PHP 7.3 branched/Feature freeze
    Aug 02 2018 Beta 1
    ... ...
    Sep 13 2018 RC 1
    ... ...
    Nov 08 2018 RC 5
    Nov 20 2018 PHP 7.3.0 branched
    Nov 22 2018 RC 6
    Dec 13 2018 GA
    21/23
    

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22. Questions
    !
    Slides can be found at https://speakerdeck.com/mazedlx
    22/23
    

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23. repod.at
    — Der Podcast mit Franky und Christian. Auf geschert.
    23/23
    

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