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IntlChar::isxdigit

(PHP 7, PHP 8)

IntlChar::isxdigitCheck if code point is a hexadecimal digit

Description

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.

Liste de paramètres

codepoint

La valeur codepoint de type entier (i.e. 0x2603 pour U+2603 SNOWMAN), ou le caractère encodé en UTF-8 de type chaîne de caractères (i.e. "\u{2603}")

Valeurs de retour

Returns true if codepoint is a hexadecimal character, false if not. Returns null on failure.

Exemples

Exemple #1 Test de différents codepoint

<?php
var_dump
(IntlChar::isxdigit("A"));
var_dump(IntlChar::isxdigit("1"));
var_dump(IntlChar::isxdigit("\u{2603}"));
?>

L'exemple ci-dessus va afficher :

bool(true)
bool(true)
bool(false)

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);
?>

Voir aussi

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