PHP 7.2.0 Beta 1 Released

Iterator::key

(PHP 5 >= 5.0.0, PHP 7)

Iterator::keyReturn the key of the current element

Descrição

abstract public scalar Iterator::key ( void )

Returns the key of the current element.

Parâmetros

Esta função não possui parâmetros.

Valor Retornado

Returns scalar on success, or NULL on failure.

Erros

Issues E_NOTICE on failure.

add a note add a note

User Contributed Notes 2 notes

up
8
michaelgranados at gmail dot com
4 years ago
Since PHP 5.5.X foreach can accept non scalar items. So the return can be anything ;)
up
2
Lszl Lajos Jnszky
5 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;
    }
To Top