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php to Calculating the Difference Between Two Arrays

Posted on November 27, 2021November 27, 2021 By christo No Comments on php to Calculating the Difference Between Two Arrays

In php The array_diff() function calculates this, returning an array with values from the first array that are not present in the second

The array_diff() function identifies values from one array that are not present in others:

$diff = array_diff(array1, array2 [, array … ]);

For example:

$a1 = array(“bill”, “claire”, “ella”, “simon”, “judy”);
$a2 = array(“jack”, “claire”, “toni”);
$a3 = array(“ella”, “simon”, “garfunkel”);
// find values of $a1 not in $a2 or $a3
$difference = array_diff($a1, $a2, $a3);
print_r($difference);

Output

Array(
[0] => “bill”,
[4] => “judy”
);

Example of array_diff

<?php
$array1 = array("a" => "green", "red", "blue", "red");
$array2 = array("b" => "green", "yellow", "red");
$result = array_diff($array1, $array2);

print_r($result);
?>

Output

Array
(
    [1] => blue
)
php Tags:array_diff(), php

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