3不同等于 [英] The 3 different equals

问题描述

= ， == 和 === / code>？

我认为使用一个等号是声明一个变量，而两个等号用于比较条件，最后三个等号用于比较

$ <$> 赋值运算符， == 等于比较运算符和 === identical比较运算符。

  $ a = $ b Assign将$ a设置为等于$ b。 
 $ a == $ b如果$ a等于$ b，则为TRUE。 
 $ a === $ b如果$ a等于$ b，则为TRUE，它们的类型相同。 （在PHP 4中引入）
  

有关 == 和 === ，以及使用它们的情况，请参阅文档。

What is the difference between =, ==, and ===?

I think using one equal sign is to declare a variable while two equal signs is for a comparison condition and lastly three equal signs is for comparing values of declared variables.

解决方案

You have = the assignment operator, == the 'equal' comparison operator and === the 'identical' comparison operator.

$a = $b     Assign      Sets $a to be equal to $b.
$a == $b    Equal       TRUE if $a is equal to $b.
$a === $b   Identical   TRUE if $a is equal to $b, and they are of the same type. (introduced in PHP 4)

For more info on the need for == and ===, and situations to use each, look at the docs.

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