Compare the values of two arrays and return the differences.
| <?php $a1=array(“a”=>“red”,“b”=>“green”,“c”=>“blue”,“d”=>“yellow”); $a2=array(“e”=>“red”,“f”=>“green”,“g”=>“blue”); $result=array_diff($a1,$a2); print_r($result); ?> |
The array_diff() function compares the values of two or more arrays and returns an array containing the entries from the first array that are not present in the subsequent arrays.
| array_diff(array1, array2, array3, …) |
Parameter
Description
array1
Required. The array to compare against.
array2
Required. An array to compare with.
array3,…
Optional. Additional arrays to compare against.
|
Return Value: |
Returns an array with entries from |
|
PHP Version: |
4.0.1+ |
Compare the values of three arrays and return the entries that are unique to the first array.
| <?php $a1=array(“a”=>“red”,“b”=>“green”,“c”=>“blue”,“d”=>“yellow”); $a2=array(“e”=>“red”,“f”=>“black”,“g”=>“purple”); $a3=array(“a”=>“red”,“b”=>“black”,“h”=>“yellow”); $result=array_diff($a1,$a2,$a3); print_r($result); ?> |