Web Dev @ Microsoft SEO By WooRank Books Courses Screencasts Newsletters Versioning Shop Forums Advertise Contribute Contact Us Our Story 995kSubscribers 132kFollowers 80kFollowers PHP Article Form Validation with PHP By Iain Tench March 09, 2012 In this article you'll construct and validate a simple form using HTML and PHP. The form is created using HTML and validation and processing of the form's contents is done with PHP. The goal is to teach you some basic HTML form elements and how their data is accessible to you in your PHP scripts. The form you'll create contains a number of inputs: text fields, radio buttons, a multiple-option select list, a checkbox, and a submit button. These inputs will be validated to ensure, for example, that the user has entered their name. Any errors or omissions will be highlighted with a message alongside the relevant field. The HTML Form First, let's look at the form. The purpose of the form is to capture user details (name, address, and email) to obtain feedback (on fruit consumption and favorite fruit) and request a brochure. Text Fields The name, address, and email fields are text input elements and can be coded like this: Name Address Email The HTML input element can have several attributes, the most important of which are the type and name attributes. type="text" defines these instances as a single-line input field to accept text. The name attribute is used to specify a name for this value. Radio Buttons 0 1 2 More than 2 Here type="radio" renders the input as a radio button. Notice how each button is assigned the same name. This is because collectively the radio buttons should be treated as a group (the user should select either 0, or 1, or 2, etc.). The value attribute diffe
Error Message In Php Form
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PHP to verify user input and send an email or display an error message in
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case the validation fails. Sample HTML Form Here is the HTML
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and PHP code for the form we will be working with:
The form will look something like the following - your basic no-frills feedback form: Your Name* Email Address* Subject Enquiry* For testing purposes we've removed all the usual JavaScript Form Validation http://www.the-art-of-web.com/php/form-handler/ and HTML5 Form Validation so the form can simply be submitted and validated by PHP on the server. You'll notice that we've used PHP to insert the form action as the current page. That's because we are using the "redirect-after-POST" technique as illustrated here: This is explained in more detail in our CAPTCHA article. It prevents the form from being resubmitted if the landing page is reloaded, and allows us to display validation error messages inline using PHP. Finally, the code includes PHP commands to re-insert any submitted values back in to the form so they don't have to be retyped in case of an error. PHP Form Handler The important characteristics of a form handler is that it verifies that the required variables have been set, and that they have appropriate values. Remember to be thorough as this is your last (only real) line of defence against malicious scripts. Here we are detecting a POST event and exto http://buildinternet.com/2008/12/how-to-validate-a-form-complete-with-error-messages-using-php-part-1/ Validate a Form Using PHP Part 1: Complete with Error Messages! Having a site visitor fill out a form is the https://www.sitepoint.com/form-validation-with-php/ primary way to gather information. Forms are the main line of communication with anyone that visits your site, so taking the error message time to make sure users fill them out correctly is key. Using PHP, we are able to ensure that all fields are properly filled out before submission, with required adjustments being called to attention through the use of error messages. The error message in CSS & HTML Groundwork Let's start off by opening up a fresh php document and putting a form within it. I have created errorpart1.php