IntlChar::tolower
(PHP 7, PHP 8)
IntlChar::tolower — Make Unicode character lowercase
说明
The given character is mapped to its lowercase equivalent. If the character has no lowercase equivalent, the original character itself is returned.
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}"
)
返回值
Returns the Simple_Lowercase_Mapping of the code point, if any; otherwise the code point itself.
The return type will be int unless the code point was passed as a UTF-8 string, in which case a string will be returned.
范例
示例 #1 Testing different code points
<?php
var_dump(IntlChar::tolower("A"));
var_dump(IntlChar::tolower("a"));
var_dump(IntlChar::tolower("Φ"));
var_dump(IntlChar::tolower("φ"));
var_dump(IntlChar::tolower("1"));
var_dump(IntlChar::tolower(ord("A")));
var_dump(IntlChar::tolower(ord("a")));
?>
以上例程会输出:
string(1) "a" string(1) "a" string(2) "φ" string(2) "φ" string(1) "1" int(97) int(97)
参见
- IntlChar::totitle() - Make Unicode character titlecase
- IntlChar::toupper() - Make Unicode character uppercase
- mb_strtolower() - 使字符串小写