This function sorts the keys of the entries using a user-supplied comparison function. The key to entry correlations will be maintained.
Access
public
Parameters
Parameter |
Type |
Required |
Description |
|---|---|---|---|
|
|
Required |
The callback comparison function. Function |
Returns
Type |
Description |
|---|---|
|
No value is returned. |
Examples
example
function cmp($a, $b) {
$a = preg_replace('@^(a|an|the) @', '', $a);
$b = preg_replace('@^(a|an|the) @', '', $b);
return strcasecmp($a, $b);
}
$array = array("John" => 1, "the Earth" => 2, "an apple" => 3, "a banana" => 4);
$arrayObject = new ArrayObject($array);
$arrayObject->uksort('cmp');
foreach ($arrayObject as $key => $value) {
echo "$key: $value\n";
}
Result:
an apple: 3 a banana: 4 the Earth: 2 John: 1

