PHP array_udiff_assoc() Function
Definition
The array_udiff() function use a built-in function to compare the keys and values of two or more arrays, and returns the differences.
Syntax
PHP array_udiff_assoc() Function has the following syntax.
array_udiff_assoc(array1,array2,array3...,myfunction)Parameter
| Parameter | Is Required | Description |
|---|---|---|
| array1 | Required. | Array to compare from |
| array2 | Required. | Array to compare against |
| array3,... | Optional. | More arrays to compare against |
| myfunction | Required. | A string that define a callable comparison function. |
myfunction must return an integer <, =, or > than 0 if the first argument is <, =, or > than the second argument.
Example
Use a built-in function to compare the keys and values of two or more arrays, and returns the differences
<?php// w w w .j a v a 2 s. co m
function myfunction($a,$b){
if ($a===$b){
return 0;
}
return ($a>$b)?1:-1;
}
$a1=array("a"=>"A","b"=>"HTML","c"=>"java2s.com");
$a2=array("a"=>"Apple","b"=>"CSS","e"=>"PHP");
$result=array_udiff_assoc($a1,$a2,"myfunction");
print_r($result);
?>
The code above generates the following result.
