{"id":5943,"date":"2013-05-11T16:00:09","date_gmt":"2013-05-11T16:00:09","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=5943"},"modified":"2013-05-11T16:05:58","modified_gmt":"2013-05-11T16:05:58","slug":"controlar-array-de-checkboxes-con-php","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/","title":{"rendered":"Controlar array de checkboxes con PHP"},"content":{"rendered":"<p>En este art\u00edculo vamos a ver como controlar un grupo de checkboxes guardados en un array con PHP.<\/p>\n<p>El componente checkbox permite seleccionar una opci\u00f3n al usuario del programa o p\u00e1gina Web con el objetivo de tomar una decisi\u00f3n directamente en pantalla. Esta situaci\u00f3n se puede dar en muchos circumstancias.<\/p>\n<p>En el ejemplo que vamos a ilustrar vamos a tener un listado de paises agrupados por continentes dando la opci\u00f3n al usuario de elegir los paises que desee.<\/p>\n<p><a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/05\/paises.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-5960\" alt=\"paises\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/05\/paises.png\" width=\"721\" height=\"376\" srcset=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/05\/paises.png 721w, https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/05\/paises-300x156.png 300w\" sizes=\"auto, (max-width: 721px) 100vw, 721px\" \/><\/a><\/p>\n<p>La idea no es m\u00e1s que un formulario con inputs checkboxes y un bot\u00f3n submit. La lista de checkboxes la pondremos de la siguiente forma:<\/p>\n<pre>&lt;input type=\"checkbox\" value=\"Espa\u00f1a\" name=\"countries[]\" \/&gt;&lt;label&gt;Espa\u00f1a&lt;\/label&gt;&lt;br\/&gt;\r\n&lt;input type=\"checkbox\" value=\"Portugal\" name=\"countries[]\" \/&gt;&lt;label&gt;Portugal&lt;\/label&gt;&lt;br\/&gt;\r\n&lt;input type=\"checkbox\" value=\"Francia\" name=\"countries[]\" \/&gt;&lt;label&gt;Francia&lt;\/label&gt;&lt;br\/&gt;\r\n...<\/pre>\n<p>Sobretodo te tienes que fijar en el atributo \u00abname\u00bb de los inputs que no es m\u00e1s que un array y tambi\u00e9n es importante su valor.<\/p>\n<p>Y el bot\u00f3n:<\/p>\n<pre>&lt;input type=\"submit\" name=\"enviar\" value=\"enviar\" \/&gt;<\/pre>\n<p>Ahora, viene la clave del asunto. Nos interesa controlar que paises ha checkeado el usuario. \u00bfC\u00f3mo controlaremos estos datos?<\/p>\n<pre>&lt;?php\r\nif (isset($_POST['enviar'])) {\r\n\u00a0\u00a0 \u00a0if (is_array($_POST['countries'])) {\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0$selected = '';\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0$num_countries = count($_POST['countries']);\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0$current = 0;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0foreach ($_POST['countries'] as $key =&gt; $value) {\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if ($current != $num_countries-1)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0$selected .= $value.', ';\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0else\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0$selected .= $value.'.';\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0$current++;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0else {\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0$selected = 'Debes seleccionar un pa\u00eds';\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0echo '&lt;div&gt;Has seleccionado: '.$selected.'&lt;\/div&gt;';\r\n}\u00a0\u00a0 \u00a0\r\n?&gt;<\/pre>\n<p>El c\u00f3digo de control anterior lo puedes situar por debajo de la etiqueta &lt;body&gt; y lo que estamos indicando es que si se ha pulsado el bot\u00f3n de enviar. Comprobamos si es un array la variable \u00abcountries\u00bb enviada por POST, y si lo es recorremos el array obteniendo su valor finalmente imprimi\u00e9ndolo por pantalla.<\/p>\n<p><a href=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/05\/paises2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-5962\" alt=\"paises2\" src=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/05\/paises2.png\" width=\"718\" height=\"48\" srcset=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/05\/paises2.png 718w, https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2013\/05\/paises2-300x20.png 300w\" sizes=\"auto, (max-width: 718px) 100vw, 718px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.jose-aguilar.com\/scripts\/php\/checkboxes-array\/index.php\" target=\"_blank\">Ver ejemplo en funcionamiento<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>En este art\u00edculo vamos a ver como controlar un grupo de checkboxes guardados en un array con PHP. El componente checkbox permite seleccionar una opci\u00f3n al usuario del programa o p\u00e1gina Web con el objetivo de tomar una decisi\u00f3n directamente en pantalla. Esta situaci\u00f3n se puede dar en muchos circumstancias. En el ejemplo que vamos [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4977,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[98,84,77],"class_list":["post-5943","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","tag-checkboxes","tag-formularios","tag-validaciones"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Controlar array de checkboxes con PHP - 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=\"Controlar array de checkboxes con PHP - Jose Aguilar Blog\" \/>\n<meta property=\"og:description\" content=\"En este art\u00edculo vamos a ver como controlar un grupo de checkboxes guardados en un array con PHP. El componente checkbox permite seleccionar una opci\u00f3n al usuario del programa o p\u00e1gina Web con el objetivo de tomar una decisi\u00f3n directamente en pantalla. Esta situaci\u00f3n se puede dar en muchos circumstancias. En el ejemplo que vamos [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/\" \/>\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=\"2013-05-11T16:00:09+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2013-05-11T16:05:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/10\/php.png\" \/>\n\t<meta property=\"og:image:width\" content=\"128\" \/>\n\t<meta property=\"og:image:height\" content=\"128\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\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=\"2 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/\",\"name\":\"Controlar array de checkboxes con PHP - Jose Aguilar Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/10\/php.png\",\"datePublished\":\"2013-05-11T16:00:09+00:00\",\"dateModified\":\"2013-05-11T16:05:58+00:00\",\"author\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/#\/schema\/person\/e6d485db1e1140866e95971d17105d11\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/#primaryimage\",\"url\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/10\/php.png\",\"contentUrl\":\"https:\/\/www.jose-aguilar.com\/blog\/wp-content\/uploads\/2012\/10\/php.png\",\"width\":128,\"height\":128},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.jose-aguilar.com\/blog\/controlar-array-de-checkboxes-con-php\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Portada\",\"item\":\"https:\/\/www.jose-aguilar.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Controlar array de checkboxes con PHP\"}]},{\"@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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