IntlChar::toupper
(PHP 7)
IntlChar::toupper — Make Unicode character uppercase
说明
The given character is mapped to its uppercase equivalent. If the character has no uppercase equivalent, the character itself is returned.
参数
返回值
Returns the Simple_Uppercase_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
Example #1 Testing different code points
<?php
var_dump(IntlChar::toupper("A"));
var_dump(IntlChar::toupper("a"));
var_dump(IntlChar::toupper("Φ"));
var_dump(IntlChar::toupper("φ"));
var_dump(IntlChar::toupper("1"));
var_dump(IntlChar::toupper(ord("A")));
var_dump(IntlChar::toupper(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(65) int(65)
参见
- IntlChar::tolower() - Make Unicode character lowercase
- IntlChar::totitle() - Make Unicode character titlecase
- mb_strtoupper() - 使字符串大写