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(PHP 7, PHP 8)
IntlChar::charMirror — Get the "mirror-image" character for a code point
$codepoint): int|string|null
Maps the specified character to a "mirror-image" character.
For characters with the Bidi_Mirrored property, implementations sometimes need a "poor man's" mapping to another Unicode character (code point) such that the default glyph may serve as the mirror-image of the default glyph of the specified character. This is useful for text conversion to and from codepages with visual order, and for displays without glyph selection capabilities.
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}")
Returns another Unicode code point that may serve as a mirror-image substitute, or codepoint
itself if there is no such mapping or codepoint does not have the
Bidi_Mirrored property.
返回类型是 int，如果代码点作为 UTF-8 string 传递，则会返回 string 。失败时返回 null。
示例 #1 Testing different code points
<?php
var_dump(IntlChar::charMirror("A"));
var_dump(IntlChar::charMirror("<"));
var_dump(IntlChar::charMirror("("));
?>
以上例程会输出：
string(1) "A" string(1) ">" string(2) ")"
IntlChar::PROPERTY_BIDI_MIRRORED