Php/docs/intlchar.isalpha

• PHP Manual
• IntlChar
• Check if code point is a letter character

IntlChar::isalpha

(PHP 7)

IntlChar::isalpha — Check if code point is a letter character

说明

public static IntlChar::isalpha ( mixed $codepoint ) : bool

Determines whether the specified code point is a letter character. true for general categories "L" (letters).

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 true if codepoint is a letter character, false if not.

范例

Example #1 Testing different code points

<?phpvar_dump(IntlChar::isalpha("A"));var_dump(IntlChar::isalpha("1"));var_dump(IntlChar::isalpha("\u{2603}"));?>

以上例程会输出：

bool(true)
bool(false)
bool(false)

参见

• IntlChar::isalnum() - Check if code point is an alphanumeric character
• IntlChar::isdigit() - Check if code point is a digit character