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<?php function foo(&$bar) { $bar = 1; return 1; } $arg = 0; $called = 0; $called=call_user_func_array('foo', array(0)); var_dump(array('arg'=>$arg, 'called'=>$called)); $arg = 0; $called = 0; $called=call_user_func_array('foo', array($arg)); var_dump(array('arg'=>$arg, 'called'=>$called)); $arg = 0; $called = 0; $called=call_user_func_array('foo', array(&$arg)); var_dump(array('arg'=>$arg, 'called'=>$called));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: foo(): Argument #1 ($bar) must be passed by reference, value given in /in/WRkIH on line 8 array(2) { ["arg"]=> int(0) ["called"]=> int(1) } Warning: foo(): Argument #1 ($bar) must be passed by reference, value given in /in/WRkIH on line 9 array(2) { ["arg"]=> int(0) ["called"]=> int(1) } array(2) { ["arg"]=> int(1) ["called"]=> int(1) }

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