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run code in 150+ php & hhvm versions
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<?php function foo(&$bar) { var_dump($bar); } $z = new stdclass; call_user_func_array("foo", array($z));
based on mr3DN
Output for hhvm-3.10.0 - 3.12.0, 7.1.0
Warning: Parameter 1 to foo() expected to be a reference, value given in /in/fLAYj on line 4 object(stdClass)#1 (0) { }
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.0.14
Warning: Parameter 1 to foo() expected to be a reference, value given in /in/fLAYj on line 4
Output for 5.0.0 - 5.2.17
object(stdClass)#1 (0) { }
Output for 4.3.0 - 4.4.9
object(stdClass)(0) { }