Form is submitting the data by attribute action=pb-text2.php to pb-text2.php file, inside which we will keep this code to receive data and display the same.
Keeping Default data inside Textbox
We will use default attribute to keep some default data inside input textbox. Source of this data can be a variable or we can display by taking data from a database table.
When the page is loaded the data stored in PHP variable will be stored and displayed inside text box as default value. Here is one example
$t1="My Data here "
echo "<input type=text name='t1' value='$t1'>";
Output is here
Redirection of submitted data to input form
In this text box we will store the value entered by the user. This form is submitting to another page where the PHP code will collect the data and it will redirect ( or back ) to main page with the value of data in query string. We will use PHP header redirect in the second page ( page to which form data will be submitted ) to post back the data to the main page having the form.
Here to take care of some characters like & we have used urlencode and urldecode to first encode the date before sending through the address bar and then after receiving at main page again we will decode it to get the original data entered by the visitor.
You are asked to update your address, the site will collect your present address from a database table and show it to you as default data inside a textbox. You can change the data and submit to update the table with your new address.