A배열에서 B배열의 값을 제외한 A배열에 값을 출력하고 싶을 경우 사용합니다.

array_diff

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

array_diff — Computes the difference of arrays

Description ¶

array array_diff ( array $array1 , array $array2 [, 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.

Parameters ¶

array1

The array to compare from

array2

An array to compare against

...

More arrays to compare against

Return Values ¶

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

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

)