PHP array_diff_ukey() function

In this chapter you will learn:

1. Syntax for PHP array_diff_ukey() function
2. Definition for PHP array_diff_ukey() function
3. Parameter for PHP array_diff_ukey() function
4. Example - Compare the keys of two arrays using a user-defined key comparison function, and return the differences

Syntax

PHP array_diff_ukey() function has the following syntax.

Definition

The array_diff_ukey() function compares the keys of two or more arrays with a user-defined function, and returns an array that contains the entries from array1 that are not present in array2 or array3, etc.

Parameter

The comparison function must return an integer <, =, or > than 0 if the first argument is <, =, or > than the second argument.

Example

Compare the keys of two arrays using a user-defined key comparison function, and return the differences:

<?php/*  j av a2 s.com*/
function myfunction($a,$b){
   if ($a===$b){
      return 0;
   }
   return ($a>$b)?1:-1;
}

$a1=array("a"=>"A","b"=>"B","c"=>"C","j"=>"java2s.com");
$a2=array("a"=>"A","b"=>"B","e"=>"E");

$result=array_diff_ukey($a1,$a2,"myfunction");
print_r($result);
?>

The code above generates the following result.

Next chapter...

What you will learn in the next chapter:

1. Definition for PHP array_fill() function
2. Syntax for PHP array_fill() function
3. Parameter for PHP array_fill() function
4. Example - Fill an array with values

PHP array() function

PHP array_change_key_case() function

PHP array_chunk() function

PHP array_combine() function

PHP array_count_values() function

PHP array_diff() function

PHP array_diff_assoc() Function

PHP array_diff_key() function

PHP array_diff_uassoc() function

PHP array_diff_ukey() function

PHP array_fill() function

PHP array_fill_keys() function

PHP array_filter() function

PHP array_flip() function

PHP array_intersect() Function

PHP array_intersect_assoc() Function

PHP array_intersect_key() function

PHP array_intersect_uassoc() Function

PHP array_intersect_ukey() Function

PHP array_key_exists() Function

PHP array_keys() function

PHP array_map() Function

PHP array_merge() function

PHP array_merge_recursive() Function

PHP array_multisort() Function

PHP array_pad() Function

PHP array_pop() function

PHP array_product() Function

PHP array_push() function

PHP array_rand() function

PHP array_reduce() Function

PHP array_replace() Function

PHP array_replace_recursive() Function

PHP array_reverse() Function

PHP array_search() Function

PHP array_shift() Function

PHP array_slice() Function

PHP array_splice() Function

PHP array_sum() Function

PHP array_udiff() Function

PHP array_udiff_assoc() Function

PHP array_udiff_uassoc() Function

PHP array_uintersect() Function

PHP array_uintersect_assoc() Function

PHP array_uintersect_uassoc() Function

PHP array_unique() Function

PHP array_unshift() Function

PHP array_values() Function

PHP array_walk() Function

PHP array_walk_recursive() Function

PHP arsort() Function

PHP asort() Function

PHP compact() Function

PHP count() Function

PHP current() Function

PHP each() Function

PHP end() Function

PHP explode() Function

PHP extract() Function

PHP implode() Function

PHP in_array() Function

PHP key() Function

PHP krsort() Function

PHP ksort() Function

PHP list() Function

PHP natcasesort() Function

PHP natsort() Function

PHP next() Function

PHP pos() Function

PHP prev() Function

PHP range() Function

PHP reset() Function

PHP rsort() Function

PHP shuffle() Function

PHP sizeof() Function

PHP sort() Function

PHP uasort() Function

PHP uksort() Function

PHP usort() Function