1. >> PHP: Form Processing

2. Processing File TRY NOW TRY NOW Will this work?
Create a new file called add-process.php
Open the file and accept the submitted values from the form (using the $_POST variable)
Write Insert Query to add the item to the database
TRY NOW
Will this work?
Open the add-item.php file
Go down to the form tag
Add the attributes
method
action
TRY NOW

3. Redirecting After a Form Submission
Approach 1: Within the process file
Do as before
Go to the add-process.php file
Under the previous written code, create tags for new page
Step 1: Create $title variable
Step 2: Create $section variable
Step 3: Include the header.php
Step 4: Write the div tag with class “content”
Step 5: Write a div tag with classes “section page”
Step 6: Write a heading 1 tag with text “Add Item”.
Step 7: Write a paragraph tag with text “Item Added to the Database Successfully”
Step 8: Include the footer.php
TRY NOW
ISSUE
Using back can resubmit the form again and send another

4. Redirecting After a Form Submission
Approach 2: Redirect to a new page
Create a new file add-thanks.php
Copy all the code from the previous add-process.php file we wrote to display the confirmation into this new page.
TRY NOW
For this to work, we need to add a redirect in the add-process.php
Open the file add-process.php
Add the following line at the end
header(‘Location: add-thanks.php’);
TRY NOW
Method for the server and the browser to communicate before any HTML gets passed

5. Redirecting After a Form Submission
Approach 3: On the same add-item page
Open the file add-item.php
In the form tag
Change the action attribute to “add-item.php”
Open the file add-process.php and copy all the code to the beginning of the add-item.php file
Modify the header command and change the page to add-item.php.
Add a command exit; after the header function
TRY NOW
Avoids execution of other php code in the file
Mind Exercise
How can we display the confirmation message and remove the form within the same add-item.php file?

6. isset() PHP method
Determines whether a certain variable has already been declared by PHP
Returns a Boolean value true if the variable has already been set
and false otherwise or if the variable is set to the value NULL
Accepts an arbitrary amount of parameters
Returns true if all the variables have been defined
 otherwise, it returns false
USAGE
if(isset($_GET[“status”])) { }

7. Web-Based Systems - Misbhauddin
Selective Display
Display this only when item is added to the database
Display this only when the query failed
Display this in the beginning
HINT
Use isset() function
Use the header function with GET
Declare a status variable
Use it as conditional in the HTML Body
Web-Based Systems - Misbhauddin

8. Summary Passing & Processing Form Variables
method=“GET” (Access using the $_GET Array)
method=“POST” (Access using the $_POST Array)
FORM
Re-direction after Form Submission
contact.php
contact-process.php
contact-thanks.php
action=“contact-process.php”
header(“Location: contact-thanks.php”
action=“contact-process.php”
Approach 1
action=“contact.php”
Approach 2
Approach 3