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run code in 150+ php & hhvm versions
Bugs & Features
<?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 - 5.5.37, 7.0.0 - 7.1.0
Warning: Parameter 1 to f() expected to be a reference, value given in /in/c8fH7 on line 12 NULL
Output for 4.3.0 - 5.2.17, 5.6.0 - 5.6.23
NULL