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<?php function ff(&$var) { return $var; } class A { public function __construct($f) { $this->f = $f; } public function __invoke() { $args = array(); foreach (func_get_args() as &$arg) { $args[] = &$arg; } return call_user_func_array($this->f, $args); } } $a = new A('ff'); echo call_user_func_array($a, array('A'));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Cannot use result of built-in function in write context in /in/JZBHi on line 16
Process exited with code 255.

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