PHP uasort() Function
The uasort() function sorts an array by values using a user-defined comparison function.
TRUE on success. FALSE on failure
Tip: Use the uksort() function to sort an array by keys using a user-defined comparison function.
| Parameter | Description |
|---|---|
| array | Required. Specifies the array to sort |
| myfunction | Optional. 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
uasort(array,myfunction); Example
function my_sort($a,$b)
{
if ($a==$b) return 0;
return ($a<$b)?-1:1;
}
$array=array("a"=>3,"b"=>2,"c"=>7,"d"=>"5");
uasort($array,"my_sort");
foreach($array as $x=>$x_value)
{
echo "Key=" . $x . ", Value=" . $x_value;
echo "
";
}Output
Key=b, Value=2
Key=a, Value=3
Key=d, Value=5
Key=c, Value=7
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