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<?php $arr = array('1', '2', '3'); foreach ($arr as $key=>&$val) { var_dump($arr); $arr[3] = '999'; echo $val."\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> &string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3" } 1 array(4) { [0]=> string(1) "1" [1]=> &string(1) "2" [2]=> string(1) "3" [3]=> string(3) "999" } 2 array(4) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> &string(1) "3" [3]=> string(3) "999" } 3 array(4) { [0]=> string(1) "1" [1]=> string(1) "2" [2]=> string(1) "3" [3]=> &string(3) "999" } 999

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