IntlChar::tolower()
版本:php7
(PHP 7)
Make Unicode character lowercase
说明
public static IntlChar::tolower(mixed $codepoint): mixed
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 integer codepoint value(e.g.0x2603forU+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 integer unless the code point was passed as a UTF-8 string, in which case a string will be returned.
范例
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