[PHP] in_array breaks down for 0 as value

[Yashesh Bhatia]

Hi.

  I wanted to use in_array to verify the results of a form submission
for a checkbox and found an interesting
behaviour.

$ php -v
PHP 5.2.5 (cli) (built: Jan 12 2008 14:54:37)
$

$ cat in_array2.php
<?php
$node_review_types = array(
                           'page'       => 'page',
                           'story'      => 'story',
                           'nodereview' => 'abc',
                           );

if (in_array('page', $node_review_types)) {
  print "page found in node_review_types\n";
 }
if (in_array('nodereview', $node_review_types)) {
  print "nodereview found in node_review_types\n";
 }

?>
$ php in_array2.php
page found in node_review_types
$

This  works fine. but if i change the value of the key 'nodereview' to
0 it breaks down.

$ diff in_array2.php in_array3.php
6c6
<                            'nodereview' => 'abc',
---
>                            'nodereview' => 0,
$

$ php in_array3.php
page found in node_review_types
nodereview found in node_review_types
$

Any reason why in_array is returning TRUE when one has a 0 value on the array ?

Thanks.

Yashesh

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