What does === mean in php

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What does “===” mean?

i am seeing === often in php statements, but don't know what it mean. e.g if ($pwd === PwdHash($pass,substr($pwd,0,9))). thanks

@rdlowrey: that is an auto-generated comment that appears when a vote to close is claiming the question as a duplicate. — sberry, Jan 18 '12 at 06:26

score 2 · Answer 1 · answered Jan 18 '12 at 06:19

2

It tests equality, but unlike == it requires that the two operands be of the same type as well as value.

For instance, "1" == 1 will be true, but "1" === 1 is false because the type is different.

answered Jan 18 '12 at 06:19

Thank you. your answer is really helpful. – geeksalah Jan 18 '12 at 06:21
1

The important point is not that `===` requires same type, but `==` actually attempts to perform **type casting** to make them `===`. – jondavidjohn Jan 18 '12 at 06:22
PHP's documentation on "Type Juggling" gets into more detail about its type system and casting (http://php.net/manual/en/language.types.type-juggling.php) – Lachlan McDonald Jan 18 '12 at 06:32

Dau · Answer 2 · 2012-01-18T06:29:44.643

-1

php has two types of equal comparison operator == and ===

== check for the equalization but not strict mean it will return true for ('123'==123)

=== is a strict equal operator it will return false for the ('123'===123)

read more about these from here

edited Jan 18 '12 at 06:29

answered Jan 18 '12 at 06:22

Dau

2

`'abc'=='ABC'` will be `false` too – Timur Jan 18 '12 at 06:25
`'abc' == 'ABC'` is false because the strings are different. – Arjan Jan 18 '12 at 06:26
thanks guys to remember my fault, I apologies for my mistake and correct that. – Dau Jan 18 '12 at 06:32

2 Answers2