asort
(PHP 4, PHP 5)
asort — Sort an array and maintain index association
Description
bool asort
( array &$array
[, int $sort_flags
] )
This function sorts an array such that array indices maintain their correlation with the array elements they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant.
如果成功則回傳 TRUE，失敗則回傳 FALSE。
Example#1 asort() example
<?php
$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
asort($fruits);
foreach ($fruits as $key => $val) {
echo "$key = $val\n";
}
?>
上例將輸出：
c = apple b = banana d = lemon a = orange
The fruits have been sorted in alphabetical order, and the index associated with each element has been maintained.
You may modify the behavior of the sort using the optional parameter sort_flags , for details see sort().