Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php |
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| 47 | class OledrionOledrion_vendorsHandler extends Oledrion_XoopsPersistableObjectHandler |
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| 48 | { |
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| 49 | /** |
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| 50 | * OledrionOledrion_vendorsHandler constructor. |
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| 51 | * @param XoopsDatabase|null $db |
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| 52 | */ |
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| 53 | public function __construct(XoopsDatabase $db) |
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| 57 | |||
| 58 | /** |
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| 59 | * Renvoie la liste de tous les vendeurs du module |
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| 60 | * |
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| 61 | * @param Oledrion_parameters $parameters |
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| 62 | * @return array tableau d'objets de type vendors |
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| 63 | * @internal param int $start Position de départ |
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| 64 | * @internal param int $limit Nombre total d'enregistrements à renvoyer |
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| 65 | * @internal param string $order Champ sur lequel faire le tri |
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| 66 | * @internal param string $order Ordre du tri |
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| 67 | * @internal param bool $idaskey Indique si le tableau renvoyé doit avoir pour clé l'identifiant unique de l'enregistrement |
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| 68 | */ |
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| 69 | public function getAllVendors(Oledrion_parameters $parameters) |
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| 88 | |||
| 89 | /** |
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| 90 | * Retourne le nombre de produits associés à un vendeur |
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| 91 | * |
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| 92 | * @param integer $vendor_id L'ID du vendeur |
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| 93 | * @return integer Le nombre de produits du vendeur |
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| 94 | */ |
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| 95 | public function getVendorProductsCount($vendor_id) |
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| 101 | |||
| 102 | /** |
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| 103 | * Supprime un vendeur |
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| 104 | * |
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| 105 | * @param oledrion_vendors $vendor |
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| 106 | * @return boolean Le résultat de la suppression |
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| 107 | */ |
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| 108 | public function deleteVendor(Oledrion_vendors $vendor) |
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| 112 | |||
| 113 | /** |
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| 114 | * Retourne des vendeurs selon leur ID |
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| 115 | * |
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| 116 | * @param array $ids Les ID des vendeurs à retrouver |
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| 117 | * @return array Objets de type oledrion_vendors |
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| 118 | */ |
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| 119 | View Code Duplication | public function getVendorsFromIds($ids) |
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| 129 | } |
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| 130 |
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.