IntlChar::toupper()

版本：php7

(PHP 7)

Make Unicode character uppercase

说明

publicstaticIntlChar::toupper(mixed $codepoint): mixed

The given character is mapped to its uppercase equivalent. If the character has no uppercase equivalent, the 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_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

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