IntlChar::isdigit()

版本：php7

(PHP 7)

Check if code point is a digit character

说明

Determines whether the specified code point is a digit character.

TRUEfor 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

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

ReturnsTRUEif$codepointis a digit character,FALSEif not.

范例

Testing different code points

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