IntlChar::foldCase
(PHP 7, PHP 8)
IntlChar::foldCase — Perform case folding on a code point
说明
public static IntlChar::foldCase(int|string
$codepoint, int $options = IntlChar::FOLD_CASE_DEFAULT): int|string|nullThe given character is mapped to its case folding equivalent; if the character has no case folding equivalent, the character itself is returned.
参数
codepoint-
The int codepoint value (e.g.
0x2603for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g."\u{2603}") options-
Either
IntlChar::FOLD_CASE_DEFAULT(default) orIntlChar::FOLD_CASE_EXCLUDE_SPECIAL_I.
返回值
Returns the Simple_Case_Folding of the code point, if any; otherwise the code point itself on success,
or null on failure.
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