IntlChar::isdigit()
版本:php7
(PHP 7)
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
- $codepoint
The integer codepoint value(e.g.0x2603forU+2603 SNOWMAN), or the character encoded as a UTF-8 string(e.g."u{2603}")
返回值
Returns TRUE
if$codepointis a digit character,FALSE
if not.
范例
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