Monday 24 February 2014

How to Create a Contact Form for Your Website in an Easy Way : A Set of Step by Step Tutorials Using HTML5, CSS3 and PHP (10)


(For the latest PDF files Merger Software please have a look at the top of the left margin, inside the red box.)
Continues From Part 9
In the previous post I got  the IP of the visitor and displayed it on the bottom of the contact page as a courtesy. I also put it inside the messages they might send for me. To keep the IP of any visitor who might send a message or just click on my page, I keep a record of IP's of all the visitors. Allow me to advance further and add more elaborations to my contact form.
Remember that I am not addressing any security issue such as preventing SQL Injection or making PHP codes more accomplished by using advanced functions. Sometimes they are controversial even among the PHP experts. I have done many computer codes from Assembly and machine codes, Fortran, dos to Eifel. Now I only do assembly, C, and Java and sometimes Windows C++. I do not like to become engaged in PHP. See, it is advised to change $Name = $_POST['Name'] to $Name = filter_input(INPUT_POST, 'Name'). This works. but a similar trick, filter_input(INPUT_SERVER, "REMOTE_ADDR") in place of $_SERVER["REMOTE_ADDR"] does not work, uniformly (might work intermittently; mostly dispatches Server Error). It is due to the fact that as you might notice, parameters and references are not uniform. Hence, the interested readers might like to study manuals deeper.

How to make a simple basic database of visitors' IP's?

How to collect (put) visitors' IP records in a text file?

It is usual that web servers use MySQL to gather information in a systematic manner. I make a simple text to keep records of visitors IP. Please remember line (217) of contact form in previous post. This is where the visitors get their IP's upon landing on the page and the best time to catch a record of the visit. Therefore, add the following snippet after this line and before line (218). Hence Line (218) will become Line (228)

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 $ip_file = 'save_ip.txt';
 $date_ti = date('Y-m-d H:i:s');
 if(file_exists($ip_file)){
       $file_content = file_get_contents($ip_file);
       file_put_contents($ip_file, $file_content . "\r\n" . $date_ti . "\t||\t" . $visitor_ip);  
 }
 else{//create text file and put header for the table
      file_put_contents($ip_file, "Date and Time" . "\t||\t" . "Visitors IPs"
               . "\r\n" . $date_ti . "\t||\t" . $visitor_ip);
 } 

(Download PHP code in Zip format here or open the code in text format here). On each landing, the code snippet checks if the text file  'save_ip.txt' is already created and exists. If it is the first ever reference to this file it creates the file and puts a simple header for its columns. Then goes to the next line and puts the date, time and IP of the first visitor in the second row. However, if the text file already exists code snippet gets contents of the text, rewrites it. Then goes to the next line and adds one new record to previous records. I tried to add some formatting and vertical bars to separate columns, nevertheless, readers might like to impose their own ways of doing that. Remember that, at the end, one needs to use MySQL to accumulate these information or to invoke third party tools and subscribed services.
Also, it is worth mentioning that one needs to become familiar with PHP tabs, new line, carriage-return, end-of-line and so on. I used the familiar "\t", "\r", "\n" for purposes of this article, but frequently, they do not behave in such a simple way as they should.
You can learn about PHP date and time formats, too, from their wikis.
After two visits you can open the text file in your browser to watch records of visitors IP's or you can download and read them with a text editor, or other ways that your web server allows.


Please check permissions (three digits numbers such as 644) for the created file not to be accessible to unwanted visitors. (In the last snap-shot IP's painted with wrong numbers for privacy of visitors.)
Please click here to open the contact form and then open the saved text to see that your own IP has been added (many times a day I renew the text to keep privacy of previous visitors).

Download this tutorial as PDF format here
Download part 1 to part 10 as PDF format here

Monday 10 February 2014

How to Create a Contact Form for Your Website in an Easy Way : A Set of Step by Step Tutorials Using HTML5, CSS3 and PHP (9)

(For the latest PDF files Merger Software please have a look at the top of the left margin, inside the red box.) 
Continues From Part 8

How to get IP addresses of visitors.

As promised, in this refinement I'll get the IP address of the visitor and show inside a formatted division to visitors who come to the contact page. You can use the code inside any other page of your choice. First let me put the final code here for your consideration  (download PHP code in Zip format here or open the code in text format here).

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<!DOCTYPE html>
<!--
Created by Peter Jones 10 February, 2014
www.codesforus.blogspot.com 
copyrights
-->
<html>
    <head>
        <title> Demo-Final: Dysprosium Contact Form, Get IP</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width">
        <script type= "text/javascript">
            var RecaptchaOptions = {
                theme: 'white'
            };
        </script>
        <style>            
            #contact-wrapper {
                margin: 20px auto;
                border: 2px solid #ccc;
                border-radius: 5px;
                padding: 20px 50px 20px 50px;
                background: transparent;
                width: 600px;
            }
            #contact-area {
                width: 600px;
                margin-top: 25px;
            }            
            #contact-area label {
                float: left;
                margin-right: 15px;
                padding-top: 5px;
                width: 100px;
                text-align: right;
                font-size: 100%;
            }
            #contact-area input, #contact-area textarea {
                margin: 0px 0px 10px 0px;
                border: 2px solid #ccc;
                border-radius: 5px;
                padding: 5px;
                width: 471px;
                font-family: Helvetica, sans-serif;
                font-size: 110%;
            }
            #contact-area textarea {
                height: 90px;
            }
            #contact-area textarea:focus, #contact-area input:focus {
                border: 2px solid #900;
            }
            #contact-area input.submit-button {
                float: left;
                cursor: pointer; 
                margin-top:10px;
                margin-left:112px;
                background: transparent;
                width: 100px;
                font-size: 100%;
                color: #024d8e
            }
            #contact-area input[type="submit"]:hover{
                border: 2px solid #900;
            } 
            #recaptcha_widget_div {
                margin-top: 20px;
                margin-bottom: 10px;
                margin-left: 112px;
            }            
            #recaptcha_fail_div {
                margin-top: 20px;
                margin-bottom: 10px;
                margin-left: 112px;
                border:medium groove #A00;
                border-radius: 5px;
                border:medium groove #A00;
                padding:3px;
                background-color:transparent;
                width:350px;
                color:#900;
                font-weight:bold;
                font-size:80%;
            }      
        </style>
    </head>
    <body>
        <div id="contact-wrapper">
            <div id="contact-area">
                <form method="post" action="">
                    <label for="Name"><span style="color: red; font-size: 100%">*&nbsp;</span>Name:</label>
                    <input type="text" name="Name" id="Name" value="<?php echo isset($_POST['Name']) ? $_POST['Name'] : '' ?>" />
                    
                    <label for="City">City:</label>
                    <input type="text" name="City" id="City" value="<?php echo isset($_POST['City']) ? $_POST['City'] : '' ?>" />
                    
                    <label for="Email"><span style="color: red; font-size: 100%">*&nbsp;</span>Email:</label>
                    <input type="text" name="Email" id="Email" value="<?php echo isset($_POST['Email']) ? $_POST['Email'] : '' ?>" />
                    
                    <label for="Subject">Subject:</label>
                    <input type="text" name="Subject" id="Subject" value="<?php echo isset($_POST['Subject']) ? $_POST['Subject'] : '' ?>" />
                    
                    <label for="Message"><span style="color: red; font-size: 100%">*&nbsp;</span>Message:</label>
                    <textarea name="Message" rows="20" cols="20" id="Message"><?php echo isset($_POST['Message']) ? $_POST['Message'] : '' ?></textarea>
                    
                    <p style="margin:20px auto 10px 112px;">Fields shown by <span style="color: red; font-size: 100%">*&nbsp;</span> are required.</p>
                        <div id="recaptcha_widget_div">
                            <?php
                                require_once('recaptchalib.php');
                                $publickey = "6LcJA-sSAAAAAPVPHLiHjGTlkhuWhLX2Luj3hS85"; // you got this from the signup page
                                echo recaptcha_get_html($publickey);
                            ?>
                        </div>
                    <input type="submit" name="submit" value="Submit" class="submit-button" />
                </form>
                <div style="clear: both;">
                </div>
                <?php
                    $visitor_ip = getVisitorIP();
                    $hdshake =null;
                    if( isset($_POST['submit']) ) { 
                        $error = null;
                        require_once('recaptchalib.php');
                        $privatekey = "6LcJA-sSAAAAABCEyOe_wqfheVwfxfu4L9idhqhv";
                        $Name = Trim(stripslashes($_POST['Name'])); 
                        $City = Trim(stripslashes($_POST['City'])); 
                        $Email = Trim(stripslashes($_POST['Email'])); 
                        $Subject = Trim(stripslashes($_POST['Subject']));
                        $Message = Trim(stripslashes($_POST['Message']));
                        $hdshake .= '<li>Your IP :&nbsp;'. $visitor_ip .'</li>';
                        $hdshake .= '<li>Your eMail :&nbsp;'.$Email.'</li>';
                        echo '<div id="recaptcha_fail_div"><ul>'. $hdshake .'</ul></div>'; 
                        if( !empty($Email) ){ 
                            list($emailPart, $domainPart) = explode('@', $Email);
                            $one=filter_var($Email, FILTER_VALIDATE_EMAIL);
                            $two=MailIPAddress($domainPart);
                            if (!(($one) && ($two))) {
                                $error .= '<li>Email is invalid .</li>';
                                echo '<div id="recaptcha_fail_div"> <ul>'. $error .'</ul></div>';
                                exit();
                            } 
                        }
                        $error .= ( empty($Name) )  ? '<li>Please enter your name.</li>' : null;
                        $error .= ( empty($Email) ) ? '<li>Blank Email is not accepted.</li>' : null;
                        $error .= ( empty($Message) ) ? '<li>Please enter some comments or questions.</li>' : null;
                        
                        $resp = recaptcha_check_answer ($privatekey, 
                                                        $_SERVER["REMOTE_ADDR"], 
                                                        $_POST["recaptcha_challenge_field"], 
                                                        $_POST["recaptcha_response_field"]);                        
                        $error .= ( !($resp->is_valid) ) ? '<li>The captcha code entered is incorrect .</li>' : null;
                        if (!empty($error)) {
                            // What happens when the CAPTCHA was entered incorrectly
                            echo '<div id="recaptcha_fail_div"> <ul>'. $error .'</ul></div>';
                            exit();
                        } 
                        //Next send contact to website admin.
                        $EmailToAdmin = "carlo.dj@messiahpsychoanalyst.org"; //Put your website admin email here. Don't forget quotes. 
                        // body of the email your own admin receives
                        $Body = "RE: Contact from visitors";
                        $Body .= "\n";
                        $Body .= "Name: ";
                        $Body .= $Name;
                        $Body .= "\n";
                        $Body .= "City: ";
                        $Body .= $City;
                        $Body .= "\n";
                        $Body .= "Subject: ";
                        $Body .= $Subject;
                        $Body .= "\n";
                        $Body .= "Email: ";
                        $Body .= $Email;
                        $Body .= "\n";
                        $Body .= "Visitor's IP: ";
                        $Body .= $visitor_ip;
                        $Body .= "\n";
                        $Body .= "Message: ";
                        $Body .= "\n";
                        $Body .= $Message;
                        $Body .= "\n";
                        // send email to admin
                        $posted = mail($EmailToAdmin, $Subject, $Body, "From: <$Email>");
                        // redirect to thanks page 
                        if ($posted){
                            echo '<div style=\'margin-top: 20px; margin-left:112px; border: 2px groove blue; border=radius:5px; padding-left: 10px; width:400px;\'>
                                     <p>Thanks By <a href="http://messiahpsychoanalyst.org">Dysprosium</a></p>
                                     <hr style=\'margin: 1px auto 1px auto; height: 1px; color: #fefefe; width: 82%;\'/> 
                                     <h1>Your message has been sent! Thanks for Your Message!</h1>
                                     <p><a href="Default.html">Click to go to Home page!</a></p>
                                  </div>';
                            //After thank you send an email containing his message to the visitor
                            // prepare email body text
                            $Body = " Madam/Sir,\n Thank you for your message.\n Dysprosium.\n";
                            $Body .= " ======================================================\n\n";
                            $Body .= "Name: ";
                            $Body .= $Name;
                            $Body .= ", Esq.";
                            $Body .= "\n";
                            $Body .= "From: ";
                            $Body .= $City;
                            $Body .= "\n";
                            $Body .= "Email: ";
                            $Body .= $Email;
                            $Body .= "\n";
                            $Body .= "Subject: ";
                            $Body .= $Subject;
                            $Body .= "\n";
                            $Body .= "Message: ";
                            $Body .= "\n";
                            $Body .= $Message;
                            $Body .= "\n";
                            // send email 
                            mail($Email, $Subject, $Body, "From: <$EmailToAdmin>");
                        }                        
                    }
                    else{
                        echo '<div id="recaptcha_fail_div">&nbsp;&nbsp;Your IP :&nbsp;'. $visitor_ip .'</div>';                                 
                    }
                ?>
            </div>
        </div>
        <?Php
            /**
             * http://www.electrictoolbox.com/php-get-mail-server-ip-address/
             * Get a mail server's IP address with PHP
             * Posted November 9th, 2012 in PHP by Chris Hope
             * Returns an IP address that mail can be delivered to for the passed in domain.
             *
             **/
            function MailIPAddress($domain) {
                $ip = false;
                $records = dns_get_record($domain, DNS_MX);
                $priority = null;
                foreach ($records as $record) {
                    if ($priority == null || $record['pri'] < $priority) {
                        $myip = gethostbyname($record['target']);
                        // if the value returned is the same, then the lookup failed
                        if ($myip != $record['target']) {
                            $ip = $myip;
                            $priority = $record['pri'];
                        }
                    }
                }
                if (!$ip) {
                    $ip = gethostbyname($domain);
                    // if the value returned is the same, then the lookup failed
                    if ($ip == $domain) {
                        $ip = false;
                    }
                }
                return $ip;
            }
        ?>
        <?php
            function getVisitorIP() {
                $client = @$_SERVER['HTTP_CLIENT_IP'];
                $forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
                $remote = $_SERVER['REMOTE_ADDR'];
                if (filter_var($client, FILTER_VALIDATE_IP)) {
                    $ip = $client;
                } 
                else { 
                     if (filter_var($forward, FILTER_VALIDATE_IP)) {
                         $ip = $forward;
                     } 
                     else {
                         $ip = $remote;
                     }
                }
                return $ip;
            }
        ?>
    </body>
</html>

Look at lines (254) to (272). A function has been added that returns IP address using PHP standard methods. This is very crude implementation of PHP and those methods should be guarded, in principle, against access to any global. Nevertheless it works for now and interested individual can do better by gaining deeper knowledge of PHP.
At line (130) visitor's IP has filled variable  $visitor_ip  to be displayed later with an echo command. Line (131) defines a $hdshake variable to show a formatted phrase for $visitor_ip and $Email of the visitor.

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 $visitor_ip = getVisitorIP();
 $hdshake =null;

If the visitor has attempted the contact form, then lines (141) to (143) display their IP and email.

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 $hdshake .= '<li>Your IP :&nbsp;'. $visitor_ip .'</li>';
 $hdshake .= '<li>Your eMail :&nbsp;'.$Email.'</li>';
 echo '<div id="recaptcha_fail_div"><ul>'. $hdshake .'</ul></div>';

Otherwise, if the visitor has just landed on the contact form page, then the page only displays his IP. This is reflected in the else phrase in lines (216) to (218).

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 else{
      echo '<div id="recaptcha_fail_div">&nbsp;&nbsp;Your IP :&nbsp;'. $visitor_ip .'</div>';                                 
 }

Meanwhile note that lines (174) to (176), where you have sent the visitor's IP back for yourself for having further information to keep in your own database.

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 $Body .= "Visitor's IP: ";
 $Body .= $visitor_ip;
 $Body .= "\n";

This is the snap-shot of page when visitor lands on page.

Above IP has been painted to a wrong number to avoid coincidence with some people's real IP. You can check yours by clicking here, please. In the next article we collect IP's of every visit in a text file.

Download this tutorial as PDF format here
Download part 1 to part 9 as PDF format here