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Request #26232 in_array produces true when bool true is in haystack
Submitted: 2003-11-12 22:11 UTC Modified: 2003-11-14 10:21 UTC
From: me at my dot house Assigned:
Status: Not a bug Package: Feature/Change Request
PHP Version: 4.3.2, 5b2 OS: *
Private report: No CVE-ID: None
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 [2003-11-12 22:11 UTC] me at my dot house 
Description:
------------
If the haystack contains the boolean true, in_array returns true!!
Check this (PHP 4.2.3-8 debian package) :



Reproduce code:
---------------
<?php
$r=array("fzsgsdgsd","reazrazr","rezarzearzae",true);
$ret=in_array("tsuser_id",$r);

print $ret;

}

?> 

Expected result:
----------------
false

Actual result:
--------------
true

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 [2003-11-13 03:27 UTC] helly@php.net 
marcus@zaphod /usr/src/php5 $ php -r 'var_dump(in_array("x",array(1,2,3,false)));'
bool(false)
marcus@zaphod /usr/src/php5 $ php -r 'var_dump(in_array("x",array(1,2,3,true)));'
bool(true)
 [2003-11-13 10:55 UTC] jay@php.net 
Isn't this sort of expected? "x" should be converted to a 
boolean and compared to true, and obviously true == true.  
 
J
 [2003-11-13 19:34 UTC] iliaa@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

This is to be expected. Jay's explanation clearly identifies the fault in the PHP script. In this situation you should specify the 3rd parameter to in_array(), which would make comparison strict.
 [2003-11-14 02:42 UTC] helly@php.net 
Yes it is correct BUT in this case i suggest we add an option to the function to switch to === checks.
 [2003-11-14 10:21 UTC] jay@php.net 
That's what Ilia was getting at. If the third parameter to 
in_array() is true, types are also checked a-la ===. 
 
As per your example... 
 
jay@monty jay $ php -r 
'var_dump(in_array("x",array(1,2,3,true)));' 
bool(true) 
jay@monty jay $ php -r 
'var_dump(in_array("x",array(1,2,3,true), true));' 
bool(false) 
 
J
 
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