IntlChar::isIDStart

(PHP 7, PHP 8)

IntlChar::isIDStart — Check if code point is permissible as the first character in an identifier

Açıklama

public static IntlChar::isIDStart(int|string $codepoint): ?bool

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).

Bağımsız Değişkenler

codepoint: int türünde Unicode karakter kodu (örn. U+2603 SNOWMAN için 0x2603) veya string türünde Unicode karakter kodu (örn. "\u{2603}")

Dönen Değerler

Returns true if codepoint may start an identifier, false if not. Returns null on failure.

Örnekler

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)

Ayrıca Bakınız

IntlChar::isalpha() - Check if code point is a letter character
IntlChar::isIDPart() - Check if code point is permissible in an identifier
IntlChar::PROPERTY_ID_START

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