[PHP]: What does array_search() return if nothing was found?

Question

What does array_search() return if nothing was found?

I have the need for the following logic:

$found = array_search($needle, $haystack);  if($found){   //do stuff } else {   //do different stuff } 

Answer 1

Quoting the manual page of array_search() :

Returns the key for needle if it is found in the array, FALSE otherwise.

Which means you have to use something like :

$found = array_search($needle, $haystack);  if ($found !== false) {     // do stuff     // when found } else {     // do different stuff     // when not found } 

Note I used the !== operator, that does a type-sensitive comparison ; see Comparison Operators, Type Juggling, and Converting to boolean for more details about that ;-)

Answer 2

if you're just checking if the value exists, in_array is the way to go.