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Bug #39788 in_array don't return false or true
Submitted: 2006-12-10 13:26 UTC Modified: 2014-04-07 17:00 UTC
From: roberto at spadim dot com dot br Assigned:
Status: Not a bug Package: Arrays related
PHP Version: 5.2.0 OS: ALL
Private report: No CVE-ID: None
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From: roberto at spadim dot com dot br
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Further comment on this bug is unnecessary.

 

 [2006-12-10 13:26 UTC] roberto at spadim dot com dot br 
Description:
------------
RETURN NULL?!?! see documentation

http://br.php.net/manual/pt_BR/function.in-array.php

just can return TRUE or FALSE! NULL isn't allowed!
see that i'm using 4 parameters and no error was showed

Reproduce code:
---------------
<?php

	$images=array(
		"cabec0" => "cabec0",		"cabec1" => "cabec1",
		"cabec2" => "cabec2",		"cabec3" => "cabec3",
		"cabec4" => "cabec4",
		"login0" => "login0",		"login1" => "login1",
		"login2" => "login2",		"login3" => "login3",
		"login4" => "login4",

		"messenger0" => "messenger0",	"messenger1" => "messenger1",
		"messenger2" => "messenger2",	"messenger3" => "messenger3",
		"messenger4" => "messenger4",

		"file_explorer0" => "explorer0","file_explorer1" => "explorer1",
		"file_explorer2" => "explorer2","file_explorer3" => "explorer3",
		"file_explorer4" => "explorer4",
		
		"yellow"=>"yellow","red"=>"red",
		"gray"=>"gray","blue"=>"blue","green"=>"green",

		"logo"   => "logo.png",		"smm"   => "smm.gif"
	);

$image='rodape';
var_dump(in_array($image,'logo','rodape','smm'));
print_r($images);
?>

Expected result:
----------------
FALSE

Actual result:
--------------
NULL

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AllCommentsChangesGit/SVN commitsRelated reports
 [2006-12-10 14:09 UTC] tony2001@php.net 
PHP Warning:  Wrong parameter count for in_array() in /tmp/6.php on line 25

Warning: Wrong parameter count for in_array() in /tmp/6.php on line 25
NULL
 [2014-04-07 15:47 UTC] kilbyc at bellsouth dot net 
I am not entirely sure how this can be filed as "Not a Bug"
Regardless of the emission of the Warning, the documentation clearly states that in_array returns bool, true, false. Null is not an acceptable value in that list.

One of the two things needs to be fixed. Either update the manual to say that in_array throws a Warning, and returns NULL if the array is null.

OR

Fix the function to return false is the array is null.
 [2014-04-07 17:00 UTC] requinix@php.net
-Block user comment: No +Block user comment: Yes
 [2014-04-07 17:00 UTC] requinix@php.net 
Thanks for bringing this ticket back up again after almost 7.5 years.

It is well established that internal functions may return NULL when you pass invalid or not enough arguments. It's stated on the manual page for internal functions. Making that note again on every single function's documentation page is redundant.
 
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