find the difference of two maps in php

To find the difference of two maps in PHP, you can use the array_diff_assoc() function. This function compares the keys and values of two arrays and returns an array containing all the entries from the first array that are not present in the second array.

Here's an example:

main.php
$map1 = ['a' => 1, 'b' => 2, 'c' => 3];
$map2 = ['b' => 2];

$difference = array_diff_assoc($map1, $map2);

print_r($difference);
130 chars
7 lines

Output:

main.php
Array
(
    [a] => 1
    [c] => 3
)
36 chars
6 lines

In this example, we have two maps ($map1 and $map2). We want to find the entries in $map1 that are not present in $map2, so we use array_diff_assoc() to compare the two maps. The resulting array, $difference, contains the entries [a] => 1 and [c] => 3, which are the entries in $map1 that are not present in $map2.