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This document uses PHP Chinese website manual Release
(PHP 7)
IntlChar::foldCase — Perform case folding on a code point
$codepoint
[, int $options
= IntlChar::FOLD_CASE_DEFAULT
] )The given character is mapped to its case folding equivalent; if the character has no case folding equivalent, the character itself is returned.
codepoint
The integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")
options
Either IntlChar::FOLD_CASE_DEFAULT
(default)
or IntlChar::FOLD_CASE_EXCLUDE_SPECIAL_I
.
Returns the Simple_Case_Folding of the code point, if any; otherwise the code point itself.