{"id":2839,"date":"2012-06-10T13:09:22","date_gmt":"2012-06-10T13:09:22","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=2839"},"modified":"2012-08-30T18:37:55","modified_gmt":"2012-08-30T18:37:55","slug":"comprobar-si-el-dni-introducido-es-correcto","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/","title":{"rendered":"Comprobar si el DNI introducido es correcto"},"content":{"rendered":"<p>En este art\u00edculo vamos a explicar como crear una funci\u00f3n que compruebe si un DNI es correcto o no con PHP.<\/p>\n<p><a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/06\/dni.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-3018\" title=\"dni\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/06\/dni-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/06\/dni-300x225.jpg 300w, https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/06\/dni.jpg 720w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>La funci\u00f3n es la siguiente:<\/p>\n<pre>function isDni($dni) {\r\n  $numeros = substr($dni, 0, -1);\r\n  $letra = substr($dni, -1, 1);\r\n  if (substr(\"TRWAGMYFPDXBNJZSQVHLCKE\",$numeros%23,1) == $letra)\r\n    return true;\r\n  else\r\n    return false;\r\n}<\/pre>\n<p>Esta funci\u00f3n recibe como par\u00e1metro un DNI y retorna si ese DNI introducido es correcto o no bas\u00e1ndose en que un DNI correcto debe tener 8 n\u00fameros con su letra correspondiente. Por ejemplo: 12345678L<\/p>\n<p>La funci\u00f3n retorna TRUE si el DNI introducido es correcto considerando los 8 n\u00fameros y su letra correspondiente. Retorna FALSE si no es correcto.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>En este art\u00edculo vamos a explicar como crear una funci\u00f3n que compruebe si un DNI es correcto o no con PHP. La funci\u00f3n es la siguiente: function isDni($dni) { $numeros = substr($dni, 0, -1); $letra = substr($dni, -1, 1); if (substr(\u00abTRWAGMYFPDXBNJZSQVHLCKE\u00bb,$numeros%23,1) == $letra) return true; else return false; } Esta funci\u00f3n recibe como par\u00e1metro un [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3018,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Comprobar si el DNI introducido es correcto - Jose Aguilar Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comprobar si el DNI introducido es correcto - Jose Aguilar Blog\" \/>\n<meta property=\"og:description\" content=\"En este art\u00edculo vamos a explicar como crear una funci\u00f3n que compruebe si un DNI es correcto o no con PHP. La funci\u00f3n es la siguiente: function isDni($dni) { $numeros = substr($dni, 0, -1); $letra = substr($dni, -1, 1); if (substr(&quot;TRWAGMYFPDXBNJZSQVHLCKE&quot;,$numeros%23,1) == $letra) return true; else return false; } Esta funci\u00f3n recibe como par\u00e1metro un [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/\" \/>\n<meta property=\"og:site_name\" content=\"Jose Aguilar Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/joseaguilarblog\" \/>\n<meta property=\"article:published_time\" content=\"2012-06-10T13:09:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2012-08-30T18:37:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/06\/dni.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"720\" \/>\n\t<meta property=\"og:image:height\" content=\"540\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jose Aguilar\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@JoseAguilarBlog\" \/>\n<meta name=\"twitter:site\" content=\"@JoseAguilarBlog\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jose Aguilar\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minuto\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/\",\"name\":\"Comprobar si el DNI introducido es correcto - Jose Aguilar Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/06\/dni.jpg\",\"datePublished\":\"2012-06-10T13:09:22+00:00\",\"dateModified\":\"2012-08-30T18:37:55+00:00\",\"author\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/#primaryimage\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/06\/dni.jpg\",\"contentUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/06\/dni.jpg\",\"width\":720,\"height\":540},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/comprobar-si-el-dni-introducido-es-correcto\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\/\/www.jose-aguilar.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Comprobar si el DNI introducido es correcto\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#website\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/\",\"name\":\"Jose Aguilar Blog\",\"description\":\"Desarrollo Web con PrestaShop, WordPress, PHP, jQuery y Ajax\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.jose-aguilar.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11\",\"name\":\"Jose Aguilar\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/abbfef5f1d75260c549d0f2c2842bb697ba1aadff3b2836b39d2590c8a625415?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/abbfef5f1d75260c549d0f2c2842bb697ba1aadff3b2836b39d2590c8a625415?s=96&d=mm&r=g\",\"caption\":\"Jose Aguilar\"},\"description\":\"Director ejecutivo y tecnol\u00f3gico en JA Modules. 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