PHP: asort() function
PHP: Sort an array and maintain index association
The asort() function is used to sorts an array. The function maintains index association.
This function is used mainly when sorting associative arrays where the actual element order is significant.
Version:
(PHP 4 and above)
Syntax:
asort(array_name, sort_type)
Parameters:
| Name | Description | Required / Optional |
Type |
|---|---|---|---|
| array_name | Specifies the name of the array to sort. | Required | Array |
| sort_type | Sets the sorting behavior. Possible type : SORT_REGULAR - Compare items normally. SORT_NUMERIC - Compare items numerically. SORT_STRING - Compare items as strings. SORT_LOCALE_STRING - compare items as strings, based on the current locale |
Optional | Integer |
Return value:
TRUE on success or FALSE on failure.
Value Type: Boolean.
Example:
<?php
$subject = array('d' => 'Language', 'c' => 'Math', 'a' => 'Science', 'b'=> 'Geography');
asort($subject);
foreach ($subject as $key => $val)
{
echo "$key = $val <br />";
}
?>
Output:
b = Geography d = Language c = Math a = Science
View the example in the browser
Practice here online :
See also