Php/docs/intlchar.isdigit

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

IntlChar::isdigit

(PHP 7)

IntlChar::isdigit — Check if code point is a digit character

说明

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

Determines whether the specified code point is a digit character.

true for characters with general category "Nd" (decimal digit numbers). Beginning with Unicode 4, this is the same as testing for the Numeric_Type of Decimal.

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 digit character, false if not.

范例

Example #1 Testing different code points

<?phpvar_dump(IntlChar::isdigit("A"));var_dump(IntlChar::isdigit("1"));var_dump(IntlChar::isdigit("\t"));?>

以上例程会输出：

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

参见

• IntlChar::isalpha() - Check if code point is a letter character
• IntlChar::isalnum() - Check if code point is an alphanumeric character
• IntlChar::isxdigit() - Check if code point is a hexadecimal digit