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PHP Contact Us Script

    PHP Contact Us Script

    A PHP script uses to send contact-us form data to the webmaster, It is simple and runs without modification

    PHP Contact Us Script Links and Downloads

    Direct download of PHP Contact Us Script

    PHP Contact Us Script on CodeProject

    Get it from GitHub

    ♦ Arabic version of this article

    Introduction

    Run out of box PHP contact-us script, it does not need modification, it will detect the domain and send an email containing the contact message to [email protected] whatever fields are in your form; it will detect them and send the form data with email.

    System requirements

    • A website with hosting support PHP; Almost all hosts do support it.
    • You could use it for any website regardless of what it uses: pure Html/PHP, WordPress, Joomla, Drupal, or any other system

    PHP Version

    PHP 5.6, PHP 7.0, PHP 7.1, PHP 7.2, PHP 7.3, PHP 7.4 or PHP 8.0

    Keywords

    HTML, PHP, web, web-hosting, website, script, code, contact us

    Background

    Lots of contact-us scripts are available over the internet.

    Other scripts need modification of the PHP file before use while this script will run directly out of the box.

    This script is very useful to those who do not know PHP and to the beginners of PHP.

    Using the Code

    • Unzip the downloaded zip file
    • Create the contact-us folder in the www directory of your website
    • Upload the files to the contact-us folder
    • That is all
    • The contact-us URL is like example.com/contact-us replace example.com with your domain

    Modifying contact-us form design

    • You could modify the contact us page design as you want,
    • Add or omit fields as needed
    • Use from_emailfrom_namesubjectmessage and captcha as fields names
    • Put your own Ads or make your form free of ads
    • You are free to put a link to us or not.

    About the contact-us code

    From Action

    <form action="send.php" method="POST">

    Fields Names

    Use from_email, from_name, subject, message and captcha as main fields’ names in your form.

    Captcha

    If you don’t wish to use captcha, then change the 1st line of the ‘send.php’ code to be:
    $captcha = false;

    If you wish to use captcha, then no change is needed and the 1st line of the ‘send.php’ code will be:

    $captcha = true;
    
    

    If you need to modify the form; please note that we use captcha, include the following in your form:

    <img src="captcha_code_file.php?rand=<?php echo rand(); 
    ?>" id='captchaimg' ><br>
    Enter the code above here : 
    <input id="captcha" name="captcha" type="text">

    Thank you URL

    Put your own $thank_you_url in the 2nd line of the code.

    What Does This Script Do?

    • Check the referrer page and stop the script if it is called directly:
      $REFERER = $_SERVER['HTTP_REFERER'];
      if(!preg_match("@^http:\/\/(www\.)?$domain\/@",$REFERER)){
                      die("This page can't be call directly");
      }
    • Validate user email and user name to prevent injecting the wrong command in the header parameter of the mail() function:
      if(!$from_email) $from_email = "[email protected]$domain";
      if (!filter_var($from_email, FILTER_VALIDATE_EMAIL)) {
                      $Err .= 'Invalid email format<br>';
                      $from_email = "[email protected]$domain";
      }
    • Validate subject and encode it if needed to prevent send failure:
      if ($subject && !preg_match('/^[A-Za-z ]+$/',$subject)){
                      $subject = "=?UTF-8?B?".base64_encode($subject)."?=";
      }
    • Store captcha in session and compare it with variable
    • Seek all posted variables
      foreach ($_POST as $key => $value)
      {
          $value = htmlspecialchars($value);
          $message_html .= "<h2>$key</h2><p>$value</p>";
      }
    • Send the message in Html UTF-8 format to be compatible with most languages
    • Redirect to thank you URL
      header('Location: '. $thank_you_url);

    PHP Mailing Technique

    There are lots of mailing techniques in PHP; PEAR Mail, PHP Mailer, and a mail function. However, we just use the mail function as it is common and simple.

    PHP Email Validation

    PHP FILTER_SANITIZE_EMAIL Filter

    Remove all illegal characters from an email address:

    $from_email = filter_var($from_email, FILTER_SANITIZE_EMAIL);

    PHP FILTER_VALIDATE_EMAIL Filter

    Check if the variable $email is a valid email address:

    if (!filter_var($from_email, FILTER_VALIDATE_EMAIL)) {                    
        $Err .= 'Invalid email format<br>';               
        $from_email = "[email protected]$domain";
    }

    Validate Email in PHP using a regular expression:

    $pattern = '/^[\w.-][email protected][\w.-]+\.[A-Za-z]{2,6}$/';
    if(!preg_match($pattern, $from_email)){ 
        $Err .= 'Invalid email format<br>';               
        $from_email = "[email protected]$domain";
    }

    What is the Next Step?

    Setting the max email could be sent for a single IP per hour.

    If you have any suggestions for this section or to improve the script; please write it in the comments to be included in the next version.

    Links

    https://www.codeproject.com/KB/PHP/1139299.aspx

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