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IntlChar::charDirection

(PHP 7, PHP 8)

IntlChar::charDirectionGet bidirectional category value for a code point

说明

public static IntlChar::charDirection(int|string $codepoint): ?int

Returns the bidirectional category value for the code point, which is used in the » Unicode bidirectional algorithm (UAX #9).

注意:

Some unassigned code points have bidi values of R or AL because they are in blocks that are reserved for Right-To-Left scripts.

参数

codepoint

The int codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")

示例

示例 #1 Testing different code points

<?php
var_dump
(IntlChar::charDirection("A") === IntlChar::CHAR_DIRECTION_LEFT_TO_RIGHT);
var_dump(IntlChar::charDirection("\u{05E9}") === IntlChar::CHAR_DIRECTION_RIGHT_TO_LEFT);
var_dump(IntlChar::charDirection("+") === IntlChar::CHAR_DIRECTION_EUROPEAN_NUMBER_SEPARATOR);
var_dump(IntlChar::charDirection(".") === IntlChar::CHAR_DIRECTION_COMMON_NUMBER_SEPARATOR);
?>

以上示例会输出:

bool(true)
bool(true)
bool(true)
bool(true)
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