IntlChar::isdigit
(PHP 7)
IntlChar::isdigit — Check if code point is a digit character
说明
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
返回值
Returns TRUE
if
codepoint
is a digit character, FALSE
if not.
范例
Example #1 Testing different code points
<?php
var_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