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run code in 150+ php & hhvm versions
Bugs & Features
<?php interface Creatable { } class FooCreatable implements Creatable { } class BarCreatable implements Creatable { } interface Creator { /** * * @param string $input * @param Creatable $creatable * @return bool */ function tryCreate($input, Creatable &$creatable = null); } class AggregateCreator implements Creator { /** * * @var Creator[] */ private $creators = []; /** * * @param Creator[] $creators */ public function __construct($creators) { $this->creators = $creators; } /** * * @param string $input * @param Creatable $creatable * @return bool */ public function tryCreate($input, Creatable &$creatable = null) { foreach ($this->creators as $creator) { if ($creator->tryCreate($input, $creatable)) { return true; } } return false; } } class FooCreator implements Creator { /** * * @param string $input * @param Creatable $creatable * @return bool */ public function tryCreate($input, Creatable &$creatable = null) { if ($input == 'foo') { $creatable = new FooCreatable; return true; } return false; } } class BarCreator implements Creator { /** * * @param string $input * @param Creatable $creatable * @return bool */ public function tryCreate($input, Creatable &$creatable = null) { if ($input == 'bar') { $creatable = new BarCreatable; return true; } return false; } } $creator = new AggregateCreator([ new FooCreator, new BarCreator, ]); $creatable = null; var_dump($creator->tryCreate('foo', $creatable), $creatable); $creatable = null; var_dump($creator->tryCreate('bar', $creatable), $creatable); $creatable = null; var_dump($creator->tryCreate('qux', $creatable), $creatable);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true) object(FooCreatable)#4 (0) { } bool(true) object(BarCreatable)#4 (0) { } bool(false) NULL
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/Gu0r3 on line 38
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/Gu0r3 on line 38
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/Gu0r3 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/Gu0r3 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/Gu0r3 on line 3
Process exited with code 255.