How to check if Two Arrays are Equal in PHP - Step by Step Examples

How to check if Two Arrays are Equal in PHP ?

Answer

To check if two arrays are equal in PHP, you can use the array_diff function for arrays with the same elements and the == operator for arrays with different elements.

✐ Examples

1 Arrays with Same Elements

In this example,

We create two arrays named $arr1 and $arr2 with the same elements.
We then use the array_diff function to check if the arrays are equal and store the result in the variable $equal1.
The array_diff function compares the values of two arrays and returns the difference.
Finally, we check if $equal1 is empty to determine if the arrays are equal.

PHP Program

<?php 
$arr1 = [1, 2, 3];
$arr2 = [1, 2, 3];
$equal1 = empty(array_diff($arr1, $arr2));
echo "Arrays are equal: " . ($equal1 ? 'true' : 'false');
?>

Output

Arrays are equal: true

2 Arrays with Different Elements

In this example,

We create two arrays named $arr3 and $arr4 with different elements.
We then use the == operator to check if the arrays are equal and store the result in the variable $equal2.
The == operator checks if two arrays are equal in terms of key/value pairs, regardless of order.
Finally, we print the value of $equal2 to the console.

PHP Program

<?php 
$arr3 = [1, 2, 3];
$arr4 = [3, 2, 1];
$equal2 = $arr3 == $arr4;
echo "Arrays are equal: " . ($equal2 ? 'true' : 'false');
?>

Output

Arrays are equal: false

Summary

In this tutorial, we learned How to check if Two Arrays are Equal in PHP language with well detailed examples.

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