PHP array_udiff_assoc()Functions
Complete PHP Array Reference Manual
Examples
Compare two arrays'key names and key values(using a built-in function to compare key names, and a user-defined function to compare key values), and returns the difference:
<?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"=>"blue","c"=>"green");
$result=array_udiff_assoc($a1,$a2,"myfunction");
print_r($result);
?>
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"=>"blue","c"=>"green");
$result=array_udiff_assoc($a1,$a2,"myfunction");
print_r($result);
?>
Run Example »
Definition and Usage
The array_udiff() function is used to compare two (or more) arrays'key names and key values, and returns the difference.
Note:This function uses a built-in function to compare key names, and uses a user-defined function to compare key values!
This function compares the key names and key values of two (or more) arrays, and returns a difference array that includes all in the compared array (array1) but not in any other parameter array (array2orarray3etc.) of key names and key values.
Syntax
array_udiff_assoc(array1,array2,array3...,myfunction)
| Parameters | Description |
|---|---|
| array1 | Required. The first array to compare with other arrays. |
| array2 | Required. The array to compare with the first array. |
| array3,... | Optional. Other arrays to compare with the first array. |
| myfunction | Required. A string defining a callable comparison function. If the first argument is <, =, > the second argument, the comparison function must return an integer <, =, > 0 accordingly. |
Technical Details
| Return value: | Returns a difference array that includes all in the compared array (array1) but not in any other parameter array (array2orarray3etc.) of key names and key values. |
|---|---|
| PHP Version: | 5+ |
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