Compare both the keys and values of two arrays using a user-defined function to compare the keys, and return the differences.
| <?php function myfunction($a,$b) { if ($a===$b) { return 0; } return ($a>$b)?1:-1; } $a1=array(“a”=>“red”,“b”=>“green”,“c”=>“blue”); $a2=array(“d”=>“red”,“b”=>“green”,“e”=>“blue”); $result=array_diff_uassoc($a1,$a2,“myfunction”); print_r($result); ?> |
The array_diff_uassoc() function compares both the keys and values of two or more arrays and returns the differences.
Note: This function uses a user-defined function to compare the keys.
It returns an array containing entries from array1 that are not present in array2, array3, and so on.
| array_diff_uassoc(array1, array2, array3, …, myfunction) |
|
Parameter |
Description |
|
array1 |
Required. The array to compare from |
|
array2 |
Required. An array to compare against |
|
array3,… |
Optional. More arrays to compare against |
|
myfunction |
Required. A string that define a callable comparison function. The comparison function must return an integer <, =, or > than 0 if the first argument is <, =, or > than the second argument |
|
Return Value: |
Returns an array with entries from |
|
PHP Version: |
5+ |
Compare the keys and values of three arrays using a user-defined function to compare the keys, and return the differences.
| <?php function myfunction($a,$b) { if ($a===$b) { return 0; } return ($a>$b)?1:-1; } $a1=array(“a”=>“red”,“b”=>“green”,“c”=>“blue”); $a2=array(“a”=>“red”,“b”=>“green”,“d”=>“blue”); $a3=array(“e”=>“yellow”,“a”=>“red”,“d”=>“blue”); $result=array_diff_uassoc($a1,$a2,$a3,“myfunction”); print_r($result); ?> |