(PHP 7)
IntlChar::isIDStart — Check if code point is permissible as the first character in an identifier
Determines if the specified character is permissible as the first character in an identifier according to Unicode (The Unicode Standard, Version 3.0, chapter 5.16 Identifiers).
TRUE
for characters with general categories "L" (letters) and "Nl" (letter numbers).
Returns TRUE
if
codepoint
may start an identifier, FALSE
if not.
Beispiel #1 Testen unterschiedlicher Codepoints
<?php
var_dump(IntlChar::isIDStart("A"));
var_dump(IntlChar::isIDStart("$"));
var_dump(IntlChar::isIDStart("\n"));
var_dump(IntlChar::isIDStart("\u{2603}"));
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
bool(true) bool(false) bool(false) bool(false)
IntlChar::PROPERTY_ID_START