PHP array_uintersect_uassoc() Function |

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PHP array_uintersect_uassoc() Function

Complete PHP Array Reference

Example

Compare the keys and values of two arrays (using user-defined functions for comparison) and return the intersection:

<?php
function myfunction_key($a,$b)
{
    if ($a===$b)
    {
        return 0;
    }
    return ($a>$b)?1:-1;
}

function myfunction_value($a,$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","c"=>"green");
$result=array_uintersect_uassoc($a1,$a2,"myfunction_key","myfunction_value");
print_r($result);
?>

Run Example »

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Definition and Usage

The array_uintersect_uassoc() function compares the keys and values of two (or more) arrays and returns the intersection.

Note: This function uses two user-defined functions for comparison; the first function compares the keys, and the second function compares the values!

This function compares the keys and values of two (or more) arrays and returns an intersection array, which includes all keys and values that are present in the compared array (array1) and also in any other parameter arrays (array2 or array3, etc.).

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Syntax

array_uintersect_uassoc(array1, array2, array3..., myfunction_key, myfunction_value)

Parameter	Description
array1	Required. The first array to compare with.
array2	Required. The array to compare with the first array.
array3,...	Optional. Other arrays to compare with the first array.
myfunction_key	Required. The name of the user-defined function that will be used to compare the array keys. A string defining a callable comparison function. If the first argument is <, =, or > the second argument, the comparison function must return an integer <, =, or > 0, respectively.
myfunction_value	Required. The name of the user-defined function that will be used to compare the array values. A string defining a callable comparison function. If the first argument is <, =, or > the second argument, the comparison function must return an integer <, =, or > 0, respectively.

Technical Details

Return Value:	Returns an intersection array, which includes all keys and values that are present in the compared array (array1) and also in any other parameter arrays (array2 or array3, etc.).
PHP Version:	5+

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Complete PHP Array Reference