IntlChar::toupper
(PHP 7, PHP 8)
IntlChar::toupper — Make Unicode character uppercase
说明
public static IntlChar::toupper(int|string
$codepoint
): int|string|nullThe given character is mapped to its uppercase equivalent. If the character has no uppercase equivalent, the 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_Uppercase_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::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
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