(PHP 5 >= 5.5.0, PHP 7, PHP 8)

Generator::keyRécupère la clé cédée


public Generator::key(): mixed

Récupère la clé de la valeur yielded.

Liste de paramètres

Cette fonction ne contient aucun paramètre.

Valeurs de retour

Retourne la clé cédée.


Exemple #1 Exemple avec Generator::key()


function Gen()
'key' => 'value';

$gen = Gen();

"{$gen->key()} => {$gen->current()}";

L'exemple ci-dessus va afficher :

key => value

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User Contributed Notes 1 note

jasonrlester at yahoo dot com
9 months ago
This is important when considering how other Generators work such as JavaScript's an Python's. While PHP's generator has the ->valid() method they don't, or an equivalent. JS uses Iterator protocol which says next() should return an object of

    done: bool,
    value: mixed

In which case you can use keys->done to see if the generator can still be iterated.
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