PHP 5.4.35 Released

Iterator::key

(PHP 5 >= 5.0.0)

Iterator::keyDevuelve la clave del elemento actual

Descripción

abstract public scalar Iterator::key ( void )

Devuelve la clave del elemento actual.

Parámetros

Esta función no tiene parámetros.

Valores devueltos

Devuelve scalar en caso de éxito, o NULL en caso de error.

Errores/Excepciones

Muestra un E_NOTICE en caso de error.

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User Contributed Notes 3 notes

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2
Lszl Lajos Jnszky
2 years ago
And converts everything to integer except string, so in php the post process could be:

    public function key() {
        $yourKey = $this->createYourKey();
        if (is_object($yourKey) || is_array($yourKey))
            throw new Exception('Array and Object not allowed.');
        elseif (is_string($yourKey))
            return $yourKey;
        else
            return (int) $yourKey;
    }
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1
michaelgranados at gmail dot com
1 year ago
Since PHP 5.5.X foreach can accept non scalar items. So the return can be anything ;)
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-1
Anonymous
3 years ago
Be careful, the returned value must be a scalar! Took me a while to figure out why foreach() doesn't work on my class that handles arrays with object keys...
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