IntlChar::isxdigit
(PHP 7)
IntlChar::isxdigit — Check if code point is a hexadecimal digit
Description
public static bool IntlChar::isxdigit ( mixed $codepoint )Determines whether the specified code point is a hexadecimal digit.
TRUE for characters with general category "Nd" (decimal digit numbers) as well as Latin letters a-f and A-F in both ASCII and Fullwidth ASCII. (That is, for letters with code points 0041..0046, 0061..0066, FF21..FF26, FF41..FF46.)
This is equivalent to IntlChar::digit($codepoint, 16) >= 0.
Parameters
codepoint
The integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")
Return Values
Returns TRUE if codepoint is a hexadecimal character, FALSE if not.
Notes
Note: In order to narrow the definition of hexadecimal digits to only ASCII characters use: <?php $isASCIIHexadecimal = IntlChar::ord($codepoint) <= 0x7F && IntlChar::isxdigit($codepoint); ?>
Examples
Example #1 Testing different code points
<?php
var_dump(IntlChar::isxdigit("A"));
var_dump(IntlChar::isxdigit("1"));
var_dump(IntlChar::isxdigit("\u{2603}"));
?>The above example will output:
bool(true)
bool(true)
bool(false)See Also
- IntlChar::isdigit() - Check if code point is a digit character
← IntlChar::isWhitespace
IntlChar::ord →
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