PHP == or ===
July 29th, 2008
Many PHP developers get confused when using the comparison operators. Mainly weather to us two equal signs or three. It really is a simple concept when you understand what it does. The double equal sign (==) compares two data types which don’t have to be in the same type. So for example you can compare
$a = 1
$b = ‘1′
$a is a integer and $b is a string. That would return true under a double equal sign.
However, the triple equal sign (===) the data types must be the same on both sides of the operand. So… the above would return false since $a is a integer and $b is a string.
So just remember that double doesn’t matter on data types triple must be the same data type.