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<?php $arr = array(3, 4); var_dump($arr); $ref =& $arr[0] ; // this statement causes the weird behaviour. Without it all is ok var_dump($arr); // as expected var_dump(doSomethingTo($arr)); // as expected var_dump($arr); // WHAT JUST HAPPENED? function doSomethingTo($arr) { // $arr BY VALUE foreach($arr as $k => $v) $arr[$k]=$v+1 ; return $arr ; }
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> int(3) [1]=> int(4) } array(2) { [0]=> &int(3) [1]=> int(4) } array(2) { [0]=> &int(4) [1]=> int(5) } array(2) { [0]=> &int(4) [1]=> int(4) }

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