(PHP 7, PHP 8)
IntlChar::isIDStart — Check if code point is permissible as the first character in an identifier
$codepoint
): ?boolDetermines if the specified character is permissible as the first character in an identifier according to Unicode (The Unicode Standard, Version 3.0, chapter 5.16 Identifiers).
true
for characters with general categories "L" (letters) and "Nl" (letter numbers).
codepoint
int türünde Unicode karakter kodu (örn. U+2603
SNOWMAN için 0x2603
) veya string
türünde Unicode karakter kodu (örn. "\u{2603}"
)
Returns true
if
codepoint
may start an identifier, false
if not. Returns null
on failure.
Örnek 1 Farklı karakter kodlarının denenmesi
<?php
var_dump(IntlChar::isIDStart("A"));
var_dump(IntlChar::isIDStart("$"));
var_dump(IntlChar::isIDStart("\n"));
var_dump(IntlChar::isIDStart("\u{2603}"));
?>
Yukarıdaki örneğin çıktısı:
bool(true) bool(false) bool(false) bool(false)
IntlChar::PROPERTY_ID_START