IntlChar::tolower()

版本：php7

(PHP 7)

Make Unicode character lowercase

说明

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

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