{"id":93,"date":"2013-04-04T15:13:27","date_gmt":"2013-04-04T13:13:27","guid":{"rendered":"http:\/\/www.lafabriquedecode.com\/blog\/?p=93"},"modified":"2013-04-04T15:17:59","modified_gmt":"2013-04-04T13:17:59","slug":"php-heritage-multiple-des-interfaces","status":"publish","type":"post","link":"http:\/\/www.lafabriquedecode.com\/blog\/2013\/04\/php-heritage-multiple-des-interfaces\/","title":{"rendered":"PHP : h\u00e9ritage multiple des interfaces"},"content":{"rendered":"<p>Vous le savez s\u00fbrement, les interfaces servent \u00e0 contraindre des classes \u00e0 impl\u00e9menter une ou des m\u00e9thodes publiques. N&rsquo;importe quelle classe, abstraite ou concr\u00e8te, peut les impl\u00e9menter. Mais saviez-vous que, contrairement aux classes, les interfaces peuvent h\u00e9riter de plusieurs parents ?<\/p>\n<p>Prenons l&rsquo;exemple suivant ;<\/p>\n<pre class=\"brush: php; title: ; notranslate\" title=\"\">\r\n\r\ninterface Counterializable extends Serializable, Countable {\r\n    public function counterialiser();\r\n}\r\n\r\nclass CompteEtSerialise implements Counterializable {}\r\n\r\n<\/pre>\n<p>Ici, l&rsquo;interface <em>Counterializable<\/em> (contraction de <em>Countable<\/em> et de <em>Serializable<\/em>) impose \u00e0 notre classe concr\u00e8te <em>CompteEtSerialise<\/em> l&rsquo;impl\u00e9mentation de 4 m\u00e9thodes:<br \/>\n&#8211; deux provenant de Serializable (<em>serialize<\/em> et <em>unserialize<\/em>)<br \/>\n&#8211; une provenant de Countable (<em>count<\/em>)<br \/>\n&#8211; une provenant de Counterializable (<em>counterialiser<\/em>)<\/p>\n<p>Si l&rsquo;on ex\u00e9cute ce code, il se produit l&rsquo;erreur suivante :<\/p>\n<pre class=\"brush: php; title: ; notranslate\" title=\"\">\r\nPHP Fatal error: Class CompteEtSerialise contains 4 abstract methods\r\nand must therefore be declared abstract or implement the remaining\r\nmethods (Counterializable::counterialiser, Serializable::serialize,\r\nSerializable::unserialize, ...)\r\n\r\n<\/pre>\n<p>Ce message d&rsquo;erreur est bien la preuve que l&rsquo;h\u00e9ritage multiple, qui ne s&rsquo;applique pas aux classes, s&rsquo;applique en revanche aux interfaces !<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vous le savez s\u00fbrement, les interfaces servent \u00e0 contraindre des classes \u00e0 impl\u00e9menter une ou des m\u00e9thodes publiques. N&rsquo;importe quelle classe, abstraite ou concr\u00e8te, peut les impl\u00e9menter. Mais saviez-vous que, contrairement aux classes, les interfaces peuvent h\u00e9riter de plusieurs parents ? Prenons l&rsquo;exemple suivant ; Ici, l&rsquo;interface Counterializable (contraction de Countable et de Serializable) impose [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[3],"tags":[7,4,9,8],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.6.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PHP : h\u00e9ritage multiple des interfaces - La Fabrique de code - Tech blog<\/title>\n<meta name=\"description\" content=\"Un exemple concret et concis de l&#039;utilisation de l&#039;h\u00e9ritage multiple avec les interfaces.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lafabriquedecode.com\/blog\/2013\/04\/php-heritage-multiple-des-interfaces\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PHP : h\u00e9ritage multiple des interfaces - 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