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PerlʹൺͯPHP͕ෆศ
ʢओ؍Ͱ͢ʣ
͋͋…͔ͩΒ…
• date: 20160521
• at: PHPΧϯϑΝϨϯεԬ 2016
• speaker: uzulla
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ࣗݾհ
• ౦ͷํͷ͏ͣΒ(uzulla)Ͱ͢
• ମܕతʹʮLʢΤϧʣʯͳํ
Ͱ͢
• ʢԬͷudzura͞Μମܕ
ʮRʢϨΪϡϥʔʣʯͰ͢
Ͷʣ
• Perlք۾ͰPHPͷਓͱ͍Θ
Ε·͕͢ɺPHPք۾ͰPerl
ͷਓͱ͍ΘΕ͍ͯΔؾ͕͠·
͢
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Perlʹൺͯ
PHP͕ෆศ
ʢओ؍Ͱ͢ʣ
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ʮPerlͷΧοίΠΠϠπ
ʢओ؍ʣ
ΛPHPͰ͔͍͍ͭͨ
ͧʂʂʯ
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͋͋…͔ͩΒ…
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ΠΤʔΠʂ
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yay
• h#ps:/
/github.com/marcioAlmada/yay
• Yay is a high level PHP preprocessor
• Not ready for real world usage yet !
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ϓϦϓϩηοαͱʁ
• Cͱ͔Ͱ͓ೃછΈ
• ίϯύΠϧ࣌ʹίʔυΛಈతʹม
• ఆɺϚΫϩஔ
• yayPHPίʔυΛม͠ɺPHPίʔυͱͯ͠ग़ྗ
͢ΔτϥϯεύΠϥΈ͍ͨͳͷ
• ࠓճPHPͷߏจΛվ͢Δͷʹ͔͍ͭ·͢
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ͱΓ͋͑ͣࢼ͢πʔϧ
• github.com/uzulla/yay-tester.php
• evalͯ͠ΔͷͰةݥͰ͢!खݩͰ͔͍ͭ·͠ΐ͏
• ʮ҆શͳϨϯαόͳΒ͏͔͍͍ͯ͝͠…ʁʯ
ʢԥΒΕͦ͏ͳͷͰࣗॏ͠·ͨ͠ʣ
• PHP>=7
ʢevalΛtryʙcatch (\Throwable $e) {}Ͱ
ଈࢮճආʣ
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say
• say "hogehoge";
• sayechoΑΓҰจࣈগͳ͍ʂ
• վߦ͕͘ͷ͕࠷ߴʹศརʂ
• ʮPerl6͡ΌΜʯ
ʮp5Ͱuse feature 'say'͢Ε…ʯ
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> {
echo ·message;
echo PHP_EOL;
}
# ͜͜·Ͱmacro
say "say!";
say "yes!";
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say "say!";
say "yes!";
// ↓
echo "say!";
echo PHP_EOL;
echo "yes!";
echo PHP_EOL;
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say!
yes!
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unless
• unless($flag){}
• if(!$flag){}ͱಉ͡
• ʮ!Λॻ͚͍͍͡Όͳ͍ʯ
ʮif( ! isKakin())Έ͍ͨͳͷࢁଓ͘ͱͭΒ͍…ʯ
ʮisHikakin()Λͭ͘Ε͑͑Μʯ
ʮͳΔ΄Ͳʁʯ
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> {
if (! (···expression)) { ···body }
}
$isSuccess = true;
unless($isSuccess){
echo('failed');
}
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$isSuccess = true;
unless($isSuccess){
echo('failed');
}
// ↓
$isSuccess = false;
if (! ($isSuccess)) {
echo('failed');
}
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failed
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range ԋࢉࢠ
• for(1 .. 10){ print $_; }
• ਖ਼͔ͳΓཉ͍͠
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> {
foreach ( range(T_LNUMBER·S , T_LNUMBER·E)
as T_VARIABLE·INDEX )
{ ···body }
}
foreach( 1 .. 10 as $_ ){ echo $_; }
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foreach( 1 .. 10 as $_ ){
echo $_;
}
// ↓
foreach ( range(1 , 10) as $_ ){
echo $_;
}
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12345678910
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range ԋࢉࢠ ͦͷ̎
• ʮrange()Ͱforeachͱ͔μϝͰ͠ΐʯ
ʮ͍ʯ
• ʢੲͷPerlPHPಉ༷ʹڊେྻ͕Ͱ͖͍ͯͨ
ʢΒ͍͠ʣʣ
• ʢࠓճ࣮͠ͳ͍͚Ͳ('a' .. 'z')ͳͲ
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> {
$__itelatorGenerator =
itelatorGenerator(T_LNUMBER·S, T_LNUMBER·E);
foreach ( $__itelatorGenerator as T_VARIABLE·INDEX )
{ ···body }
}
function itelatorGenerator($init, $fin){
$num = $init;
while(1){
if( $fin < $num ) { return $num++; }
yield $num++;
}
}
foreach( 1 .. 10 as $_ ){ echo $_; }
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function itelatorGenerator($init, $fin){
$num = $init;
while(1){
if( $fin < $num ) { return $num++; }
yield $num++;
}
}
// ͜͜·Ͱڞ௨
foreach( 1 .. 10 as $_ ){ echo $_; }
// ↓
$__itelatorGenerator·cfcd208495d565ef66e7dff9f98764da
= itelatorGenerator(1, 10);
foreach ( $__itelatorGenerator·cfcd208495d565ef66e7dff9f98764da as $_ )
{ echo $_; }
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12345678910
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ਖ਼نදݱϚονͱஔ
• Ϛον
• if( "123" =~ /2/ ){ }
• ஔ
• $abc =~ s/a/A/;
• ݸਓతʹ݁ߏ͖
• ʮPerlه߸ଟਿʯ
ʮperlopͰάάΕʯ
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> {
preg_match(
'/'. ··stringify(T_STRING·B) .'/u',
T_VARIABLE·A
)
}
if($abc =~ /a/){ echo 1; }
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if($abc =~ /a/){
echo 1;
}
// ↓
if(preg_match( '/'. 'a' .'/u' ,$abc )){
echo 1;
}
# օ͞Μ͕͍͍͍ͨ͜ͱղΔ
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> {
T_VARIABLE·A =
preg_replace(
'/'. ··stringify(T_STRING·B) .'/u',
··stringify(T_STRING·C) ,
T_VARIABLE·A
)
}
$abc = 'abc';
$abc =~ s/a/v/;
echo $abc;
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$abc =~ s/a/v/;
// ↓
$abc = preg_replace(
'/' . 'a' . '/u',
'v' ,
$abc
);
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༨ஊ:JS෩ਖ਼نදݱϚον
• if($abc./a/){ ... }
• ʮOOPͬΆ͍ʂʯ
ʮݩʑΦϒδΣΫτࢦݴޠ͔ͩͧͬ͠Γ͠Ζʯ
• ʮPHPͳΒ −>Ͱʁʯ
ʮͤͳʯ
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> {
if( preg_match(
'/'. ··stringify(T_STRING·B) .'/u' ,
T_VARIABLE·A ) )
{ ···body }
}
$abc = 'abc';
if($abc./a/){
echo 1;
}
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if($abc./a/){ echo 1; }
// ↓
if( preg_match(
'/'. 'a' .'/u' ,
$abc
)
){ echo 1; }
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yadayada
• ...
• ʮޙͰ࣮͢Δ͔Β...ʯͱ͍͏࣌ͷʮ...ʯ
• ౸ୡ͢Δͱɺྫ֎্͕͕Δ
• //TODOΑΓΘ͔Γ͍͢…͔…͠Εͳ͍
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> {
throw new \Exception ('Unimplemented');
}
if(1){
...
}
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if(1){
...
}
// ↓
if(1){
throw new \Exception ('Unimplemented');
}
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block scope
• {ʙ}
• ϒϩοΫͷதͰείʔϓ͕ग़དྷΔ
• ͋ΔҙຯҰ൪ϚΫϩͬΆ͍
• ΊͬͪΌ΄͍͠ʂʂʂ
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> {
( function( $arg ) {
extract( $arg );
···body
} ) ( get_defined_vars() ) ;
}
$abc = 'abc';
{
$abc = 'def';
echo $abc, PHP_EOL;
}
echo $abc, PHP_EOL;
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{
$abc = 'def';
}
// ↓
( function( $arg·cfSNIPda ) {
extract( $arg·cfSNIPda );
$abc = 'def';
} ) ( get_defined_vars() ) ;
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def
abc
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use
• ʮPHPͷuseͬͯͳΜͳͷɺಡΈࠐΜͰ͘Εͳ͍ͷ
Α͘Θ͔Βͳ͍Μ͚ͩͲ…ʯʢ༑ਓͷJVMܥϓϩ
άϥϚஊʣ
ʮͨɺ͔ͨ͠ʹ…ʯ
• useͰຊʹrequire_once͢Εղܾ
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> {
use ·type ;
__require( ··stringify(·type) ) ;
}
function __require($class){
$array = explode('\\', ltrim($class, '\\'));
$path = implode('/', $array);
$filename = $path.'.php';
require_once($filename);
}
use \This\Is\Test;
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use \This\Is\Test;
// ↓
use \This\Is\Test ;
__require( '\This\Is\Test' ) ;
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use strict;
use warnings;
• ͍ܰΤϥʔͰऴྃ͢Δ
• ͍͋͠ॴͰܯࠂ͢Δ
• ʢຊ͏ͪΐͬͱҙຯ͕͋Δʣ
• ʢηοτ͍ͯ͠ΔΤϥʔϋϯυϥ࡞๏ݸਓతझ
ຯͰ͢ʣ
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> {
set_error_handler(
function($errno, $errstr, $errfile, $errline){
throw new \Error($errstr);
}
);
}
macro { use warnings; } >> { error_reporting(-1); }
use strict;
use warnings;
echo $a;
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use strict;
use warnings;
// ↓
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·ͱΊ
• yayͬͯ݁ߏศརͰʂʢʁʣ
• ʮҰਓϓϩδΣΫτझຯͳΒͳʂʯ
• ஔͱ͔Ͱͳ͍ͷͰɺ
ʢͪΌΜͱॻ͚ʣ͔ͳΓյΕͮΒ͍
• ग़ྗ͞ΕΔͷɺຊͷPHPͳͷͰ҆৺ʢʁʣ
• ୯७ͳϧʔλʔఆٛͷDSLͳΒͭ͘Ε·ͨ͠
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ຊʹΔਓͷίϝϯτ
• yayɺυΩϡϝϯτ͕ςετίʔυ͔͠ͳ͍ͷͰௐ
Δͷ͕େม
• τʔΫϯछͷT_VARIABLE
github/nikic/PHP-Parser
• ύʔαʔͷ·ls
github/marcioAlmada/yay/src/
parsers.php
• ʮͱʹ͔࣮͘ͱςετίʔυΛݟΔΜͩʯ
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• ·ͱ.ͱɾΛؒҧ͑ͯେม
• middle dot
• ʮ·(00B7)ͬͯɺීஈͲ͏ͬͯೖྗ͢ΔΜ…ʯ
• ʮதࠇΛ·(00B7)ʹม͢Δpreprocessor͕ඞཁͰ
ʯ
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__END__
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__halt_compiler();
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ʮyapc8oji Ͱάάͬͯ͘ΕཔΉʯ
τʔΫԠืͯ͘͠Εʂʂ̍
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͓·͚ɿshort closure
• ( )->{ }
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{ ···body }
} >> {
function ( ···condition ) { ···body }
}
$a = ($v)->{ echo $v; };
$a('abc');
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$a = ($v)->{ echo $v; };
// ↓
$a = function ( $v ) { echo $v; };
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Defined-Or, //= ԋࢉࢠ
• $a //= 'default';
• ʢ//??ͱಉ͡ʣ
• ຊؾͰཉ͍͠
• 7.xͰདྷΔʢ͚ͲઌऔΓͱ͍͏͜ͱͰʣ
=> https://wiki.php.net/rfc/
null_coalesce_equal_operator
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> {
T_VARIABLE·A = T_VARIABLE·A ??
}
$a ??= 123;
echo $a;
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$a ??= 123;
echo $a;
// ↓
$a = $a ?? 123;
echo $a;
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splitͱjoin
• ʮͲ͏ͯ͠Explode/Implode͕׳Εͳ͍ʯ
ʮ׳ΕΖʯ
ʮͳͥจࣈΛ૿͢ํʹߦͬͨͷ͔ʯ
ʮఘΊΖʯ
• PHP7Ͱ͍ͭʹফ໓͠·ͨ͠Ͷ
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> { mb_split }
macro { join } >> { implode }
print_r( split(",", "a,b,c") );
print_r( join(",", ["a","b","c"]) );
# PHP7Ͱsplit()͕ͳ͘ͳͬͯ
# mb_splitͷ͍ͬͯ͜ΔΜͩΑͳ͋…
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split(",", "a,b,c");
join(",", ["a","b","c"]);
// ↓
mb_split(",", "a,b,c");
implode(",", ["a","b","c"]);