Rechercher une fonction PHP

array_diff

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(PHP 4 >= 4.0.1, PHP 5, PHP 7)

array_diff — Computes the difference of arrays

Description

array_diff ( array $array1 , array $array2 [, array $... ] ) : array

Compares array1 against one or more other arrays and returns the values in array1 that are not present in any of the other arrays.

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Parameters

array1

The array to compare from

array2

An array to compare against

...

More arrays to compare against

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Return Values

Returns an array containing all the entries from array1 that are not present in any of the other arrays.

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Examples

Example #1 array_diff() example

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

print_r($result);
?>

Multiple occurrences in $array1 are all treated the same way. This will output : 

Array
(
    [1] => blue
)

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Notes

Note:

Two elements are considered equal if and only if (string) $elem1 === (string) $elem2. In other words: when the string representation is the same.

Note:

This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_diff($array1[0], $array2[0]);.

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See Also

Find a PHP function

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Document created the 30/01/2003, last modified the 26/10/2018
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References

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