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run code in 300+ PHP versions simultaneously
<?php function &g(&$v) { return $v; } function f(&$v) { $v = 5; } $foo = null; $name = 'foo'; call_user_func_array('f', array(&g($$name))); //var_dump(array(g($$name))); var_dump($foo);
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.26
Fatal error: Can't use function return value in write context in /in/BIFk8 on line 12
Process exited with code 255.
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187.95 ms | 1395 KiB | 63 Q