How to remove values in one array from another array using PHP?

Question: How to remove values in one array from another array using PHP?

Example: I have array A with values and another array B. I need to remove the values in array A from the values in array B.

Answer: 

1. Use the PHP function array_diff
   
   • Description
     
     • array array_diff ( array $array1 , array $array2 [, array $ ... ] )
     • Compares array1  against array2  and returns the difference.
   • Parameters
     • array1 = The array to compare from
     • array2 = An array to compare against
2. Code example below:
   
   

   <?php
   
       $arrayA = array('one','two');
       $arrayB = array('one','two','three','four','five');
       
       $newArray = array_diff($arrayB,$arrayA);
       
       echo '<pre>';
       print_r($newArray);
       echo '</pre>';
   
   ?>
   

3. The code example above will print the following:
   

   Array
   (
       [2] => three
       [3] => four
       [4] => five
   )
   

4. Explanation:
   • Array A values will be removed from array B
   • The $newArray variable will contain the values of array B with values from array A removed

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