PHP 8.4.0 RC4 available for testing

    ArrayObject::offsetGet

    (PHP 5, PHP 7, PHP 8)

    ArrayObject::offsetGet — Retorna o valor no índice especificado

    Descrição

    public ArrayObject::offsetGet(mixed $key): mixed

    Parâmetros

    key

    O índice com o valor.

    Valor Retornado

    O valor no índice especificado ou null.

    Erros/Exceções

    Produz uma mensagem de erro E_NOTICE quando o índice especificado não existe.

    Exemplos

    Exemplo #1 Exemplo de ArrayObject::offsetGet()

    <?php
    $arrayobj     = new ArrayObject(array('zero', 7, 'example'=>'e.g.'));
    var_dump($arrayobj->offsetGet(1));
    var_dump($arrayobj->offsetGet('example'));
    var_dump($arrayobj->offsetExists('notfound'));
    ?>

    O exemplo acima produzirá:

    int(7)
string(4) "e.g."
bool(false)

    Melhore Esta Página

    Aprenda Como Melhorar Esta Página • Envie uma Solicitação de Modificação • Reporte um Problema
    ＋adicione uma nota

    Notas Enviadas por Usuários (em inglês) 3 notes

    up
    4
    Sam
    16 years ago
    If you're overloading ArrayObject, it's worth noting that while this method (when implemented by the parent) will return a reference, so code like $fakeArray['foobar']['hello'] = 1; will work like you expect.

    However, when you overload the offsetGet method, you CANNOT define it as &offsetGet, so the above code falls out (because it returns the 'foobar' variable before you actually work with it).

    This is something that the developers broke between 5.0 and 5.1, and was closed as bogus (http://bugs.php.net/bug.php?id=34783). So this is not a big, or question, or request, but just something worth noting.
    up
    2
    Jason
    8 years ago
    It's worth noting that the PHP devs *did* fix the issue brought up in Sam's comment in 2013 (per the comment thread in his link here: https://bugs.php.net/bug.php?id=34783#1366088374), since at least PHP 5.3.8.

    So, you *can* (and in most cases should) overload offsetGet with reference syntax to get expected functionality:

    <?php
    class myArrayType extends ArrayAccess {

    public function &    offsetGet($index) {
    // ...
    }

    }
    ?>
    up
    1
    Alex Andrienko
    15 years ago
    Speaking of offsetGet() method overloading, be advised, that if you're iterating through Object via foreach, this method wouldn't be called. Iterator's current() method will be called instead.
    ＋adicione uma nota
    To Top