array_diff_uassoc
(no version information, might be only in CVS)
array_diff_uassoc -- Computes the difference of arrays
with additional index check which is performed by a user
supplied callback function.
Description
array array_diff_assoc ( array array1, array array2 [, array
..., callback key_compare_func])
array_diff_uassoc() returns an array containing all the
values from array1 that are not present in any of the other
arguments. Note that the keys are used in the comparison
unlike array_diff(). This comparison is done by a user supplied
callback function. It must return an integer less than,
equal to, or greater than zero if the first argument is
considered to be respectively less than, equal to, or greater
than the second. This is unlike array_diff_assoc() where
an internal function for comparing the indices is used.
Example 1. array_diff_uassoc() example
<?php
function key_compare_func($a, $b)
{
if ($a === $b) {
return 0;
}
return ($a > $b)? 1:-1;
}
$array1 = array("a" => "green",
"b" => "brown", "c" =>
"blue", "red");
$array2 = array("a" => "green", "yellow",
"red");
$result = array_diff_uassoc($array1, $array2, "key_compare_func");
?>
The result is:
Array
(
[b] => brown
[c] => blue
[0] => red
)
In our example above you see the "a" => "green"
pair is present in both arrays and thus it is not in the
ouput from the function. Unlike this, the pair 0 => "red"
is in the ouput because in the second argument "red"
has key which is 1.
The equality of 2 indices is checked by the user supplied
callback function.
Note: Please note that this function only checks one dimension
of a n-dimensional array. Of course you can check deeper
dimensions by using, for example, array_diff_uassoc($array1[0],
$array2[0], "key_compare_func");.
See also array_diff(), array_diff_assoc(), array_udiff(),
array_udiff_assoc(), array_udiff_uassoc(), array_intersect(),
array_intersect_assoc(), array_uintersect(), array_uintersect_assoc()
and array_uintersect_uassoc().
