Iterator::key

(PHP 5 >= 5.0.0)

Iterator::keyReturn the key of the current element

Descrierea

abstract public scalar Iterator::key ( void )

Returns the key of the current element.

Parametri

Această funcție nu are parametri.

Valorile întoarse

Returns scalar on success, or NULL on failure.

Erori/Excepții

Issues E_NOTICE on failure.

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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
9 months ago
Since PHP 5.5.X foreach can accept non scalar items. So the return can be anything ;)
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-1
Anonymous
2 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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