{"id":5224,"date":"2025-12-18T12:15:50","date_gmt":"2025-12-18T11:15:50","guid":{"rendered":"https:\/\/sutilweb.eu\/?page_id=5224"},"modified":"2025-12-18T12:15:52","modified_gmt":"2025-12-18T11:15:52","slug":"25-clases-abstractas-en-php","status":"publish","type":"page","link":"https:\/\/sutilweb.eu\/index.php\/lenguajes\/php\/php-practico\/25-clases-abstractas-en-php\/","title":{"rendered":"25. Clases abstractas en PHP"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Cuando&nbsp;creamos interfaces, debemos definir todos los m\u00e9todos que coloquemos dentro como m\u00e9todos p\u00fablicos, pero no se pueden utilizar m\u00e9todos protegidos, por lo que para estos casos no vamos a poder utilizar interfaces. Para ello nos van a ayudar lo que se denominan <strong>clases abstractas<\/strong>. Se comportan de una manera similar a las interfaces pero permiten definir los m\u00e9todos como protegidos o permiten poder extendernos en la funcionalidad de alg\u00fan m\u00e9todo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La clase abstracta se&nbsp;crea de igual manera que las clases, s\u00f3lo que anteponiendo la palabra reservada <strong><em>abstract<\/em><\/strong> delante de la palabra <strong><em>class.<\/em> <\/strong>Igualmente, a todos los m\u00e9todos que incluyamos les tenemos que anteponer la palabra reservada <strong><em>abstrac<\/em><em>t<\/em><\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cuando definimos una clase abstracta, no podemos instanciar esta clase, las clases abstractas s\u00f3lo sirven para que pueda ser extendida desde otra clase.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ejm<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>  &lt;?php\n\n  \/\/ Creaci\u00f3n de una clase abstracta\n  abstract class ClaseAbstracta {\n    abstract protected function getValor();\n    abstract public function valorPrefijo($prefijo);\n\n    public function imprimir(){\n      echo $this->getValor();\n    }\n  }\n\n  class ClaseConcreta extends ClaseAbstracta {\n    protected function getValor(){\n      return \"Clase concreta\";\n    }\n\n    public function valorPrefijo($prefijo, $separador = \".\"){\n      return $prefijo . \"Clase concreta\";\n    }\n  }\n\n  $clase1 = new ClaseConcreta;\n  $clase1->imprimir();\n  echo \"&lt;br \/>\";\n  echo $clase1->valorPrefijo(1);<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Cuando&nbsp;creamos interfaces, debemos definir todos los m\u00e9todos que coloquemos dentro como m\u00e9todos p\u00fablicos, pero no se pueden utilizar m\u00e9todos protegidos, por lo que para estos casos no vamos a poder utilizar interfaces. Para ello nos van a ayudar lo que se denominan clases abstractas. Se comportan de una manera similar a las interfaces pero permiten [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":4518,"menu_order":24,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-5224","page","type-page","status-publish","hentry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"Sutil Web","author_link":"https:\/\/sutilweb.eu\/index.php\/author\/sutilweb\/"},"uagb_comment_info":0,"uagb_excerpt":"Cuando&nbsp;creamos interfaces, debemos definir todos los m\u00e9todos que coloquemos dentro como m\u00e9todos p\u00fablicos, pero no se pueden utilizar m\u00e9todos protegidos, por lo que para estos casos no vamos a poder utilizar interfaces. Para ello nos van a ayudar lo que se denominan clases abstractas. Se comportan de una manera similar a las interfaces pero permiten&hellip;","_links":{"self":[{"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages\/5224","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/comments?post=5224"}],"version-history":[{"count":3,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages\/5224\/revisions"}],"predecessor-version":[{"id":5227,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages\/5224\/revisions\/5227"}],"up":[{"embeddable":true,"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/pages\/4518"}],"wp:attachment":[{"href":"https:\/\/sutilweb.eu\/index.php\/wp-json\/wp\/v2\/media?parent=5224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}