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

面向?qū)ο箫L(fēng)格

public Collator::getSortKey(string $string): string|false

過程化風(fēng)格

collator_get_sort_key(Collator $object, string $string): string|false

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.

參數(shù)

object

Collator object.

string

The string to produce the key from.

返回值

Returns the collation key for the string, 或者在失敗時返回 false.

警告

此函數(shù)可能返回布爾值 false，但也可能返回等同于 false 的非布爾值。請閱讀 布爾類型章節(jié)以獲取更多信息。應(yīng)使用 === 運(yùn)算符來測試此函數(shù)的返回值。

范例

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于：


3832404046010901dc08

參見