{"id":366,"date":"2011-06-28T15:50:05","date_gmt":"2011-06-28T15:50:05","guid":{"rendered":"https:\/\/www.jose-aguilar.com\/blog\/?p=366"},"modified":"2019-07-26T10:09:33","modified_gmt":"2019-07-26T10:09:33","slug":"validar-input-checkbox-con-php","status":"publish","type":"post","link":"https:\/\/www.jose-aguilar.com\/blog\/validar-input-checkbox-con-php\/","title":{"rendered":"Validar input checkbox con PHP"},"content":{"rendered":"

En este art\u00edculo vas a descubrir como validar<\/strong> una casilla de verificaci\u00f3n o campo tipo checkbox<\/strong> con PHP<\/strong>.<\/p>\n

Parece una tonter\u00eda pero, a menudo nos rompemos la cabeza intentado averiguar porque no conseguimos validar un campo tipo checkbox<\/em>.<\/p>\n

Una forma de comprobar el valor de dicho campo en el servidor con PHP<\/strong> lo vas a ver a continuaci\u00f3n.<\/p>\n

En el ejemplo en funcionamiento voy a revisar con PHP<\/strong> si el usuario ha aceptado las condiciones o no al enviar el formulario para mostrar un mensaje de alerta o mensaje de confirmaci\u00f3n.<\/p>\n

El formulario que voy a utilizar es muy simple ya que tan solo tiene el campo de verificaci\u00f3n que el usuario debe verificar.<\/p>\n

En el cuerpo de la p\u00e1gina o dentro de la etiqueta <body> agrega el c\u00f3digo HTML<\/strong> que permite mostrar el formulario:<\/p>\n

<\/a>Source code<\/a><\/td><\/a> <\/a> <\/a> <\/td><\/tr><\/table><\/div>
<form<\/span><\/a> action<\/span>=<\/span>"index.php"<\/span> method<\/span>=<\/span>"post"<\/span>><\/span>\n    <div<\/span><\/a> class<\/span>=<\/span>"form-group form-check"<\/span>><\/span>\n        <input<\/span><\/a> type<\/span>=<\/span>"checkbox"<\/span> class<\/span>=<\/span>"form-check-input"<\/span> id<\/span>=<\/span>"conditions"<\/span> name<\/span>=<\/span>"conditions"<\/span> value<\/span>=<\/span>"1"<\/span>><\/span>\n        <label<\/span><\/a> class<\/span>=<\/span>"form-check-label"<\/span> for<\/span>=<\/span>"conditions"<\/span>><\/span>Aceptar condiciones de uso<\/<\/span>label<\/span><\/a>><\/span>\n    <\/<\/span>div<\/span><\/a>><\/span>\n    <input<\/span><\/a> type<\/span>=<\/span>"submit"<\/span> class<\/span>=<\/span>"btn btn-primary"<\/span> name<\/span>=<\/span>"sendForm"<\/span> value<\/span>=<\/span>"Enviar"<\/span>\/<\/span>><\/span>\n<\/<\/span>form<\/span><\/a>><\/span><\/pre><\/div><\/div>\n
El formulario tiene una acci\u00f3n en la que indico el archivo que debe ejecutarse al pulsar el bot\u00f3n de \u00abEnviar\u00bb. Los datos son recibidos por el servidor mediante el m\u00f3dulo POST.<\/p>\n
Dentro del formulario tan solo hay una casilla de verificaci\u00f3n o checkbox y campo de tipo submit que hace de bot\u00f3n para enviar el formulario.<\/p>\n
Para el aspecto visual estoy utilizando Bootstrap 4<\/strong>.<\/p>\n
El c\u00f3digo PHP<\/strong> que recoge esta informaci\u00f3n para procesarla est\u00e1 en el mismo archivo index.php<\/em>. All\u00ed donde quieras agregar lo siguiente:<\/p>\n
<\/a>Source code<\/a><\/td><\/a> <\/a> <\/a> <\/td><\/tr><\/table><\/div>
<?php<\/span>\nif<\/span> (<\/span>isset<\/span><\/a>(<\/span>$_POST<\/span>[<\/span>'sendForm'<\/span>]<\/span>)<\/span>)<\/span> {<\/span>\n    if<\/span> (<\/span>isset<\/span><\/a>(<\/span>$_POST<\/span>[<\/span>'conditions'<\/span>]<\/span>)<\/span> &&<\/span> $_POST<\/span>[<\/span>'conditions'<\/span>]<\/span> ==<\/span> '1'<\/span>)<\/span>\n        echo<\/span> '<div class="alert alert-success">Has aceptado correctamente las condiciones de uso.<\/div>'<\/span>;<\/span>\n    else<\/span>\n        echo<\/span> '<div class="alert alert-danger">Debes aceptar las condiciones de uso.<\/div>'<\/span>;<\/span>\n}<\/span>\n?><\/span><\/pre><\/div><\/div>\n
Donde estoy controlando si el bot\u00f3n con name=\u00bbsendForm\u00bb ha sido pulsado para luego controlar si el valor del campo de la casilla de verificaci\u00f3n est\u00e1 checkeado o no.<\/p>\n
Y ya puedes ver en tu p\u00e1gina web algo como la siguiente imagen:<\/p>\n
\"Validar<\/p>\n
Como puedes observar, validar un campo tipo checkbox<\/strong> con PHP<\/strong> es muy sencillo. Con pocas l\u00edneas de c\u00f3digo lo tienes.<\/p>\n
<\/i> Ver demo<\/a> <\/i> Descargar<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Tutorial y c\u00f3digo de ejemplo que te va a permitir descubrir como validar un campo tipo checkbox o casilla de verificaci\u00f3n en el servidor con PHP.<\/p>\n","protected":false},"author":1,"featured_media":7381,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[98,84,77],"class_list":["post-366","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php","tag-checkboxes","tag-formularios","tag-validaciones"],"yoast_head":"\nValidar input checkbox con PHP - Jose Aguilar Blog<\/title>\n<meta name=\"description\" content=\"Tutorial y c\u00f3digo de ejemplo que te va a permitir descubrir como validar un campo tipo checkbox o casilla de verificaci\u00f3n en el servidor con PHP.\" \/>\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=\"Validar input checkbox con PHP - 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