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<?php function format(& $collection) { $collection["prefix"] = 'ass'; } $collection = array('a' => 1, 'b' => 2, 'c' => 3); call_user_func_array('format', array($collection)); var_dump($collection);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: format(): Argument #1 ($collection) must be passed by reference, value given in /in/ovZov on line 6 array(3) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) }
Output for 5.3.3 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: Parameter 1 to format() expected to be a reference, value given in /in/ovZov on line 6 array(3) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) }

preferences:
209.67 ms | 404 KiB | 258 Q