PHP Compare Two Array for Matches

In this tutorial, you will learn how to compare two or more arrays in PHP and create new arrays with match values.

How to Compare Two or More Array for Matches in PHP?

You can use array_intersect() function of PHP for that:

The PHP array_intersect() function compares the values of two or more array values, and it returns a new array with the match values.

Here is syntax of array_intersect():

The syntax of array_intersect() function is following:

 array_intersect(array_one, array_second, array_third, …, array_n);

Parameters of array_diff() function:

Parameter	Description
array_one	This is required. The array to compare from.
array_second	This is required. An array to compare against.

Example 1 – PHP Compare two arrays For a match

Let’s take the first example:

$array1 = array('apple', 'banana', 'orange', 'pear');
$array2 = array('banana', 'pear', 'grape', 'watermelon');
$common = array_intersect($array1, $array2);
print_r($common);

Example 2 – Compare Numeric Array in PHP

Let’s take the second example, in this example, you have two numeric arrays with match values:

    <?php
    $array_one = array(1, 2, 3, 4, 5, 6);
    $array_second = array(1, 2, 3, 4);
    $res = array_intersect($array_one,$array_second);
    print_r($res);
    ?>

The result of the above code is: Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 )

Example 3 – Compare three arrays for matches

Let’s take the third example for compare three array:

$array1 = array('apple', 'banana', 'orange', 'pear');
$array2 = array('banana', 'pear', 'grape', 'watermelon');
$array3 = array('pear', 'pineapple', 'kiwi', 'orange');
$common = array_intersect($array1, $array2, $array3);
print_r($common);

Conclusion

In conclusion, the array_intersect() function is a useful tool for comparing arrays for matches in PHP.

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