Collator::getSortKey
collator_get_sort_key
(PHP 5 >= 5.3.2, PHP 7, PHP 8, PECL intl >= 1.0.3)
Collator::getSortKey -- collator_get_sort_key — Get sorting key for a string
說明
物件導向風格
public Collator::getSortKey(string
$string): string|false過程化風格
Return collation key for a string. Collation keys can be compared directly instead of strings, though are implementation specific and may change between ICU library versions. Sort keys are generally only useful in databases or other circumstances where function calls are extremely expensive.
返回值
Returns the collation key for the string, 或者在失敗時返回 false.
範例
示例 #1 collator_get_sort_key()example
<?php
$s1 = 'Hello';
$coll = collator_create('en_US');
$res = collator_get_sort_key($coll, $s1);
echo bin2hex($res);
?>
以上例程的輸出類似於：
3832404046010901dc08
參見
- collator_sort() - Sort array using specified collator
- collator_sort_with_sort_keys() - Sort array using specified collator and sort keys