sort
(PHP 4, PHP 5)
sort — Sort an array
Description
bool sort
( array &$array
[, int $sort_flags
] )
This function sorts an array. Elements will be arranged from lowest to highest when this function has completed.
Note: 本函式為 array 中的元素賦予新的鍵名。這將刪除原有的鍵名而不僅是重新排序。
如果成功則回傳 TRUE，失敗則回傳 FALSE。
Example#1 sort() example
<?php
$fruits = array("lemon", "orange", "banana", "apple");
sort($fruits);
foreach ($fruits as $key => $val) {
echo "fruits[" . $key . "] = " . $val . "\n";
}
?>
上例將輸出：
fruits[0] = apple fruits[1] = banana fruits[2] = lemon fruits[3] = orange
The fruits have been sorted in alphabetical order.
The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
Sorting type flags:
- SORT_REGULAR - compare items normally (don't change types)
- SORT_NUMERIC - compare items numerically
- SORT_STRING - compare items as strings
- SORT_LOCALE_STRING - compare items as strings, based on the current locale. Added in PHP 4.4.0 and 5.0.2. Before PHP 6, it uses the system locale, which can be changed using setlocale(). Since PHP 6, you must use the i18n_loc_set_default() function.
Note: The second parameter was added in PHP 4.
Warning
Be careful when sorting arrays with mixed types values because sort() can produce unpredictable results.
See also arsort(), asort(), ksort(), krsort(), natsort(), natcasesort(), rsort(), usort(), array_multisort(), and uksort().