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)

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