PHP in_array object comparing?

Question

Can the in_array function compare objects?

For example, I have an array of objects and I want to add them distinctly to another array. Is it possible to check if an object has already been added like so:

in_array($distinct, $object); 

or is there any other way?

Answer 1

You can use strict comparison:

in_array($object, $array, TRUE); 

Usage example:

$a = new stdClass(); $a->x = 42;  $b = new stdClass(); $b->y = 42;  $c = new stdClass(); $c->x = 42;  $array = array($a,$b);  echo in_array($a, $array, true); // 1 echo in_array($b, $array, true); // 1 echo in_array($c, $array, true); //