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<?php class Promise { public $value; public function __construct($value) { $this->value = $value; } public function when(callable $callable) { $callable($this->value); } } $promise = new Promise(new StdClass); var_dump($promise); $promise->when(function(&$when) { $when = 42; }); var_dump($promise);
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
object(Promise)#1 (1) { ["value"]=> object(stdClass)#2 (0) { } } object(Promise)#1 (1) { ["value"]=> int(42) }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 object(Promise)#1 (1) { ["value"]=> object(stdClass)#2 (0) { } } object(Promise)#1 (1) { ["value"]=> int(42) }
preferences:
210.95 ms | 402 KiB | 228 Q