Validating php code
Then, the if (isset($_POST["submit"])) test returns true, and it executes the code in that if-block.Each rules = “…” line adds a new validation rule into the rules list.Live Demo Following is a live demo of the PHP form we will create by the end of this tutorial.states that after submission form data will be handled by the PHP script present in this file only.These validation rules are basically a LIST (or an array for the technically-literate), saying which form fields need to validated, in what way, and what errors should be displayed to the user if they’re not filled in properly. Add some display code into your page which will output any errors that occur.The overall logic of the code is simple: if the user has clicked the submit button (with the name=”submit” attribute), it submits the contents of the form to the same page.
The demonstration page contains all the validation options currently offered by the script.
Version 2.0 (Dec 2006) includes some additional validation rules (alphanumeric test, improved range and length tests). Many thanks to Mihai Ionescu and Nathan Howard for contributing their code.
The 2.3.1 release fixes a bug noticed by Khalid Hanif with the reg_exp option. I’ve tried to make this script as simple to integrate as possible, but these help pages are included here as a handy reference and starting point. Here are the steps you’ll need to do to get it working with your form. Direct your form to submit its contents to itself using the action=”” attribute.
I want all the three columns details to be entered by the user.
if the user leaves anyone of them, it should show an alert message like "Please enter the name, it cannot be blank".