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<?php function foo(&$a, $b) { $a = 'AA'; $b = 'BB'; } $a = 'A'; $b = 'B'; call_user_func_array('foo', array(&$a, $b)); assert($a === 'AA'); assert($b === 'B'); $a = 'A'; $b = 'B'; call_user_func_array('foo', array(&$a, &$b)); assert($a === 'AA'); assert($b === 'B'); $a = 'A'; $b = 'B'; call_user_func('foo', $a, $b); assert($a === 'A'); assert($b === 'B');
Output for git.master, git.master_jit, rfc.property-hooks
Warning: foo(): Argument #1 ($a) must be passed by reference, value given in /in/5ojUk on line 27

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