PHP array_diff_uassoc() Function
The array_diff_uassoc() function is used to compare two or more arrays with an additional user supplied function. The function compares array1 against array2 and returns the difference. Unlike array_diff() the array keys are used in the comparison.
Note: This function uses a user-defined function to compare the keys!
| 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 |
Syntax
array_diff_uassoc(array1,array2,array3...,myfunction);Example
function myfunction($a,$b)
{
if ($a==$b)
{
return 0;
}
return ($a>$b)?1:-1;
}
$array1=array("a"=>"Prince","b"=>"James","c"=>"Samuel","d"=>"Cooper");
$array2=array("a"=>"Prince","b"=>"James","c"=>"Samuel");
$result=array_diff_uassoc($array1,$array2,"myfunction");
print_r($result);Output
Array ( [d] => Cooper )
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