==和===有什麼區別？

Question

可能重複：
php == vs === operator
Reference - What does this symbol mean in PHP?

在PHP中，是什麼==和===之間的區別？另外，!=和!==有什麼區別？感謝幫助！

Answer 1

從http://us.php.net/manual/en/language.operators.comparison.php

$a == $b Equal TRUE if $a is equal to $b after type juggling. 
$a === $b Identical TRUE if $a is equal to $b, and they are of the same type. 
$a != $b Not equal TRUE if $a is not equal to $b after type juggling. 
$a <> $b Not equal TRUE if $a is not equal to $b after type juggling. 
$a !== $b Not identical TRUE if $a is not equal to $b, or they are not of the same type.