International PHP Conference 2019 - Spring Edition

IntlChar::isxdigit

(PHP 7)

IntlChar::isxdigitCheck if code point is a hexadecimal digit

Beschreibung

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.

Parameter-Liste

codepoint

Der Integer-Wert des Codepoints (z.B. 0x2603 f├╝r U+2603 SNOWMAN) oder das Zeichen als UTF-8 String kodiert (z.B. "\u{2603}")

R├╝ckgabewerte

Returns TRUE if codepoint is a hexadecimal character, FALSE if not.

Anmerkungen

Hinweis:

In order to narrow the definition of hexadecimal digits to only ASCII characters use:

<?php
$isASCIIHexadecimal 
IntlChar::ord($codepoint) <= 0x7F && IntlChar::isxdigit($codepoint);
?>

Beispiele

Beispiel #1 Testen unterschiedlicher Codepoints

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

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

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

Siehe auch

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