note 10165 added to in_array

The reason that in_array returns True or False rather than the index is probably that what you're looking for might be found at location 0 of the array. You do something like if(in_array("duh",$bluh)). If $bluh[0]=="duh", the logic of the if() statement is defeated. Solution? Create another function, perhaps where_in_array(), or have in_array() return -1 if and only if the element is not found. (But then, it would be very easy to get confused while using in_array() and forget that 0 might actually be a valid result, and fall into the broken if() clause, above.) http://www.php.net/manual/function.in-array.php