What is the function of php array_diff_assoc function

The array_diff_assoc() function is a built-in function of PHP that is used to obtain the difference between two or more arrays. This function compares the keys and values ​​between two or more arrays and returns the difference. Usually compares two arrays based on keys and values ​​and returns elements that are in the first array but not present in the other input array.

php array_diff_assoc() function

Function: Used to compare two The key names and key values ​​of one (or more) arrays, and the difference is returned.

Syntax:

array_diff_assoc(array1,array2,array3...);

Parameters: This function can take any number of arrays as parameters that need to be compared.

●array1: Must, the first array to compare with other arrays

●array2: Must, the array to compare with the first array

●array3: Optional, the array to compare with the first array

.....

Return value: This function compares two (or more ) keys and values ​​of an array, and returns a difference array that includes all keys and values ​​that are in the compared array (array1) but are not in any other parameter array (array2 or array3, etc.).

Let’s take a look at how to use the php array_diff_assoc() function through an example.

Example 1:

<?php
$a1=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"yellow");
$a2=array("a"=>"red","b"=>"green","c"=>"blue");
$result=array_diff_assoc($a1,$a2);
print_r($result);
?>

Output:

Array ( [d] => yellow )

Example 2:

<?php 

$array1 = array("10"=>"RAM", "20"=>"LAXMAN", "30"=>"RAVI","40"=>"KISHAN","50"=>"RISHI"); 
$array2 = array("10"=>"RAM", "70"=>"LAXMAN", "30"=>"KISHAN","80"=>"RAGHAV"); 
$array3 = array("20"=>"LAXMAN", "80"=>"RAGHAV"); 
print_r(array_diff_assoc($array1, $array2, $array3)); 
?>

Output:

Array ( [30] => RAVI [40] => KISHAN [50] => RISHI )

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