IntlChar::isdefined
(PHP 7, PHP 8)
IntlChar::isdefined — Check whether the code point is defined
Beschreibung
public static IntlChar::isdefined(int|string
$codepoint): ?boolDetermines whether the specified code point is "defined", which usually means that it is assigned a character.
true for general categories other than "Cn" (other, not assigned).
Hinweis:
Note that non-character code points (e.g., U+FDD0) are not "defined" (they are Cn), but surrogate code points are "defined" (Cs).
Parameter-Liste
-
codepoint -
Der int-Wert des Codepoints (z. B.
0x2603für U+2603 SNOWMAN) oder das Zeichen als UTF-8-String kodiert (z.B."\u").
Rückgabewerte
Returns true if
codepoint is a defined character, false if not. Returns null on failure.
Beispiele
Beispiel #1 Testen unterschiedlicher Codepoints
<?php
var_dump(IntlChar::isdefined("A"));
var_dump(IntlChar::isdefined(" "));
var_dump(IntlChar::isdefined("\u"));
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
bool(true) bool(true) bool(false)
Siehe auch
- IntlChar::isdigit() - Check if code point is a digit character
- IntlChar::isalpha() - Check if code point is a letter character
- IntlChar::isalnum() - Check if code point is an alphanumeric character
- IntlChar::isupper() - Check if code point has the general category "Lu" (uppercase letter)
- IntlChar::islower() - Check if code point is a lowercase letter
- IntlChar::istitle() - Check if code point is a titlecase letter
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