1--TEST-- 2Bug #67633: A foreach on an array returned from a function not doing copy-on-write 3--FILE-- 4<?php 5 6function id($x) { 7 return $x; 8} 9 10function &ref_id(&$x) { 11 return $x; 12} 13 14$c = 'c'; 15$array = ['a', 'b', $c]; 16 17foreach(id($array) as &$v) { 18 $v .= 'q'; 19} 20var_dump($array); 21 22foreach(ref_id($array) as &$v) { 23 $v .= 'q'; 24} 25var_dump($array); 26 27?> 28--EXPECT-- 29array(3) { 30 [0]=> 31 string(1) "a" 32 [1]=> 33 string(1) "b" 34 [2]=> 35 string(1) "c" 36} 37array(3) { 38 [0]=> 39 string(2) "aq" 40 [1]=> 41 string(2) "bq" 42 [2]=> 43 &string(2) "cq" 44} 45
