What does === mean in php

The === operator in PHP is used to compare whether the values ​​and types of two expressions are exactly equal. It returns true if both values ​​and types are equal, otherwise it returns false.

=== operator in PHP

In PHP, ===## The # operator is a strict equality operator that compares the values ​​and types of two expressions.

Usage:

=== operator is used to check whether the values ​​and types of two expressions are completely equal. Returns true if and only if both expressions are equal in value and type. Otherwise, returns false.

Grammar:

<code class="php">$result = ($expression1 === $expression2);</code>

Example:

<code class="php">$a = 10;
$b = 10;
$c = "10";

var_dump($a === $b); // true
var_dump($b === $c); // false
var_dump($c === $a); // false</code>

Note:

• === is different from the == operator. == only compares values, while === compares values ​​and types.
• === Comparisons are less reliable for floating point numbers, which may contain rounding errors.

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