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

What is the difference between == and ===? The following article will introduce it to you. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

The difference between === and == in php

===Compare the value and type of two variables; == Compares the values ​​of two variables, not the data types.

For example:

$a = '123';
$b = 123;

$a === $b  //为假；
$a == $b  //为真；

In some cases you cannot use ==, you can use ===, for example:

<?php
$a = &#39;abc&#39;;
$b= &#39;a&#39;;
if(strpos($a,$b) === false){
    echo &#39;字符串不包含&#39;;
}else{
    echo &#39;字符串包含&#39;;
}
?>

If you use ==, the output will be "The string does not contain ”, which is inconsistent with reality.

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