IntlChar::toupper()

版本：php7

(PHP 7)

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

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

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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