if statement

[Xerpher]

I understand doing something like this

Code: Select all

if ($one == $two) three();

but what I dont understand is

Code: Select all

if ($one === $two) three();

What is the third equal sign do? I tried searching in php.net but didn't find it.

[pootergeist]

=== = exactly the same (including type)

1 == 01
1 !=== 01

1 == '1'
1 !=== '1'

the typecasted === is rarely used though.

[WiZARD]

If you want to understand how it's work to you need to know what === it's called like equal if some variables for example $a and $b but $a is string and $b is not yore have a fail :^(