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07-Apr-2016 03:14

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In the at very beginning, we initialized variable name $error as blank.

Then rest of the script will be executed if the form is submitted as line 11.

In this post, you’ll learn – How to Validate Forms with PHP and it will be a server side form validation.

We will create a user registration form at first, and then we will validate fields of that form such as name, email, phone number, birth date, bio etc.

Bad data can harm a server, steal information or even can delete a whole database.

As server side form validation is done on server, the submitted data is validated and cleaned by server and then it is used.

Client side form validation is done in user’s machine but server side form validation is done on server.

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No one can modify those data without having access to the server.In this example, you will need two files as below with correspondence names. These files are commented enough to understand what’s going on. If you want, you can use get method, just change method=”get” and replace $_POST with $_GET – that’s all.In this document we have discussed Java Script Form Validation using a sample registration form.The tutorial explores Java Script validation on submit with detail explanation.

body { font-family: 'trebuchet ms'; font-size: 1.4em; padding: 0 50px; color: #444; } input, textarea {font-size: 1em;} p.error {background: #ffd; color: red;} p.error:before {content: "Error: ";} p.success {background: #ffd; color: green;} p.success:before {content: "Success: ";} p.error, p.success {font-weight: bold;} real_escape_string() as above function is deprecated // Or you can use prepared statements to sanitize // Use stripslashes to do the opposite } // do stuffs with validated & safe data //show the raw data (for practice) var_dump($_POST); } ? We used text inputs, password inputs, number inputs, radio button inputs and a textarea input. This PHP syntax is shorthand for echoing a variable inline (see this post for more on PHP Shorthand Syntax) and “@” as prefix on any expression in PHP, any error messages that might be generated by that expression will be ignored.

We used “@” in case if the variable is not set, it won’t show any error.



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