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In this article, we will discuss the differences between ‘==’ and ‘===’ operators in PHP. Both are comparison operators used to compare two or more values.
== Operator: This operator is used to check the given values are equal or not. If yes, it returns true, otherwise it returns false.
Syntax:
operand1 == operand2
=== Operator: This operator is used to check the given values and its data type are equal or not. If yes, then it returns true, otherwise it returns false.
Syntax:
operand1 === operand2
Note: === operator will return false when data types of operand are different.
Example 1: The following code demonstrates == operator with same and different data type operands.
PHP
<?php
$a = 34;
$b = 34;
// Show message if two operands are
// equal with same data type operands
if($a == $b) {
echo "Equal";
}
else{
echo "Not Equal";
}
echo "\n";
// Show a message if two operands are equal
// with different data type operands
// First is of string type and the second
// is of integer type
if('34' == 34){
echo "Equal";
}
else{
echo "Not Equal";
}
?>
Output:
EqualEqual
Example 2: The following code demonstrates the === operator.
PHP
<?php
$a = 34;
$b = 34;
// Return a message if two operands are
// equal with same data type operands
if($a === $b){
echo "Equal";
}
else{
echo "not Equal";
}
echo "\n";
// Return a message if two operands are equal
// with different data type operands
// First is of string type and the second
// is if integer type
if('34' === 34){
echo "Equal";
}
else{
echo "not Equal";
}
?>
Output:
Equalnot Equal
Difference between == and === operators:
| == | === |
| It is equal to operator. | It is an identical operator. |
| It is used to check the equality of two operands. | It is used to check the equality of both operands and their data type. |
Last Updated : 18 Oct, 2021
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