note 19564 deleted from function.array-search by didou

Note Submitter: dakota@dir.bg ---- Do not expect array_search() to return TRUE or FALSE like in_array(). if ($id = array_search($needle, $array)) ... Note that if the corresponding key of the value is 0 (the first element of an array), the value is found, but the function returns 0. So, use isset() for the given key like in the following example: $myarray = array(4, 8, 10); $array2check = array(4, 9); foreach ($array2check as $k=>$v) { $id = array_search($v, $myarray); if (isset($id)) { echo "$v found: \$myarray[$id]\n"; } } $id is undefined if array_search() returns FALSE, so you don't have to unset it at the end of the foreach() cycle. P.S.: The example above can be used instead of array_diff() which was broken, I don't know the reasons why.