In PHP, if 0==false is true, and false==false is true, how to test for false?

Question

I am especially interested in testing the return value of preg_match, which can be 1, 0, or false.

Answer 1

$val === false;

Example:

0 === false; // returns false
false === false; // returns true

Use triple equals operator/strict comparison

Answer 2

Use === type comparison. Check the manual: http://www.php.net/manual/en/language.operators.comparison.php