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- intl
- IntlChar
IntlChar::isxdigit
(PHP 7, PHP 8)
IntlChar::isxdigit — Check if code point is a hexadecimal digit
说明
public static IntlChar::isxdigit(int|string$codepoint): ?bool
Determines whether the specified code point is a hexadecimal digit.
true for characters with general category "Nd" (decimal digit numbers) as
well as Latin letters a-f and A-F in both ASCII and Fullwidth ASCII.
(That is, for letters with code points 0041..0046, 0061..0066, FF21..FF26, FF41..FF46.)
This is equivalent to IntlChar::digit($codepoint, 16) >= 0.
参数
-
codepoint -
The int codepoint value (e.g.
0x2603for 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 hexadecimal character, false if not. Returns null on failure.
范例
示例 #1 Testing different code points
<?php
var_dump(IntlChar::isxdigit("A"));
var_dump(IntlChar::isxdigit("1"));
var_dump(IntlChar::isxdigit("\u{2603}"));
?>
以上例程会输出：
bool(true) bool(true) bool(false)
注释
注意:
In order to narrow the definition of hexadecimal digits to only ASCII characters use:
<?php
$isASCIIHexadecimal = IntlChar::ord($codepoint) <= 0x7F && IntlChar::isxdigit($codepoint);
?>
参见
- IntlChar::isdigit() - Check if code point is a digit character
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/intlchar.isxdigit.php