Bug #72746 [Opn->Nab]: Switch default case

Edit report at https://bugs.php.net/bug.php?id=72746&edit=1 ID: 72746 Updated by: requinix@php.net Reported by: dkruger at pinnaclepub dot com Summary: Switch default case -Status: Open +Status: Not a bug Type: Bug -Package: Unknown/Other Function +Package: Scripting Engine problem Operating System: CentOS 7 PHP Version: 5.6.24 Block user comment: N Private report: N New Comment: This behavior has been present in all versions of PHP as far back as I can remember. https://3v4l.org/mU9Fr switch does a loose comparison. 0 == "Three" so that case will be executed. http://php.net/manual/en/types.comparisons.php#types.comparisions-loose (your situation is "php" <-> 0) If you only want the switch to be evaluated for string keys when you know that there are integer keys as well (something I don't recommend), consider wrapping the switch in an if (is_string($k)) { Alternatively you can do switch(true) { case $k === "Three": but at that point you might as well just do a series of ifs. Previous Comments: ------------------------------------------------------------------------ [2016-08-03 15:24:08] dkruger at pinnaclepub dot com Description: ------------ Hello, this is a pretty basic issue, basically, it seems that when using an array with a mix of strings and integers or default keys (0, 1, 2 etc), if using foreach to iterate through each element of the array intending for something specific to happen when the string key is hit, and having a 0 element in the array, the 0 element is running what should only be happening when that string element is in the array. I do not believe this issue had occurred in previous versions of php but I had just recently updated to 5.6.24 from 5.6.21. Thank you, Test script: --------------- <?php // Test for switch not running default code when array element key is 0 if there is a mix of array keys that are numerical along with a string array key $test = array(0 => "First element, should be 0",1 => "Second element, should be 1",2 => "Third element, should be 2","Three" => "Fourth element, should be Three"); print_r($test); foreach($test as $k => $v) { switch($k) { case "Three": echo "not to be printed\n"; break; default: echo $k.": ".$v."\n"; break; } } ?> Expected result: ---------------- Array ( [0] => First element, should be 0 [1] => Second element, should be 1 [2] => Third element, should be 2 [Three] => Fourth element, should be Three ) 0: First element, should be 0 1: Second element, should be 1 2: Third element, should be 2 not to be printed Actual result: -------------- Array ( [0] => First element, should be 0 [1] => Second element, should be 1 [2] => Third element, should be 2 [Three] => Fourth element, should be Three ) not to be printed 1: Second element, should be 1 2: Third element, should be 2 not to be printed ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=72746&edit=1