Fix Syntax Errors and Improve Email Handling in Contact Form Script

[iamabhishek2828]

The current PHP script for handling contact form submissions has several issues that need to be addressed to ensure proper functionality, security, and user experience.
Problems Identified:
Syntax Errors:
Misplaced semicolon in the assignment of $visitor_email.
Typo in the email headers ("form" should be "From").
Security Concerns:
Lack of validation and sanitization for user inputs.
Potential vulnerability to header injection attacks via the mail function.
Functional Issues:
$email_from contains a URL instead of an email address.
Incorrect email headers leading to improper email formatting.
Need for proper redirection after form submission.

[iamabhishek2828]

I would like to work on this issue. Please assign it to me.