array_diff_key() function in php
0 2024
array_diff_key() function of PHP is used to calculate the difference of two or more arrays by comparing the keys of given arrays. It is an inbuilt function of PHP.
Syntax:
array_diff_key ($arr1,$arr2,.....,$arrN);
Here
$arr1,$arr2 and $arrN are arrays.
Example 1:
<?php $arr1=array("fruit1"=>"Mango","fruit2"=>"Orange","fruit3"=>"Pear","fruit4"=>"Banana","fruit5"=>"Apple"); $arr2=array("fruit1"=>"Mango","fruit6"=>"Banana"); $arr3=array("fruit2"=>"Orange","fruit3"=>"Pear"); $new_arr=array_diff_key($arr1,$arr2,$arr3); echo "<pre>"; print_r($new_arr); ?>
Output:
Example 2:
<?php $arr1=array("Mango","Orange","Pear","Banana","Apple"); $arr2=array("Mango","Banana"); $new_arr=array_diff_key($arr1,$arr2); echo "<pre>"; print_r($new_arr); ?>
Output:
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