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Php > E-Mail Code Examples

Email a user with out exposing email address

Email a user with out exposing email address Keeping emails hidden is an increasing concern with all the spam floating around. Here is a way using MySQL and a contact form to allow a group of users on a site to contact each other safely... Bastien <?php //select the email address' from your db /* CREATE TABLE `contacts` ( `id` int(10) NOT NULL auto_increment, `first_name` varchar(30) NOT NULL default '', `last_name` varchar(50) NOT NULL default '', `email` varchar(75) default NULL, `contact_status` tinyint(1) NOT NULL default '0', PRIMARY KEY (`id`) ) TYPE=MyISAM AUTO_INCREMENT=2 ; */ if (isset($_POST['submit'])) { //submit button pushed call the send_email function send_email(); }else{ //nothing has been pushed so show the form show_form(); }//end if /* send_mail function */ function send_email() { //default values for elements $subject = ''; $id = ''; $message = ''; $your_name = ''; $your_email = ''; $err_msg = ''; $headers = ''; //get the values from the form handle any errors if(isset($_POST['subject'])) { $subject = $_POST['subject']; } if(isset($_POST['email'])) { $id = $_POST['email']; } if(isset($_POST['message'])) { $message = $_POST['message']; } if(isset($_POST['your_name'])) { $your_name = $_POST['your_name']; } if(isset($_POST['your_email'])) { $your_email = $_POST['your_email']; } if ($id == "" ) { $err_msg = "No person chosen."; } //sender's email if(!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $your_email)) { $err_msg .= "Your email is not valid. Please re-enter it<br />"; $your_email = ''; } //check to see if the other elements have values if(empty($message)) { $err_msg .= "No message set. Please enter a message.<br />"; } if(empty($subject)) { $err_msg .= "No subject set. Please enter a subject.<br />"; } if(empty($your_name)) { $err_msg .= "No sender name set. Please enter a your name.<br />"; } //check the err_msg to see if there are any messages if ($err_msg != ''){ //there is an error so build the data into a pipe delimited string and pass it back to the form $data = "$id|$subject|$message|$your_email|$your_name"; show_form($data,$err_msg); die(); }//end if //get the email from the db and send it $sql = "select email from contacts where id = $id"; $result = conn($sql); if(mysql_num_rows($result)==1) { $row = mysql_fetch_array($result); $email = $row['email']; } //send the email //build the headers $headers .= "MIME-Version: 1.0\n"; $headers .= "Content-type: text/html; charset=iso-8859-1\n"; $headers .= "X-Priority: 1\n"; $headers .= "X-MSMail-Priority: High\n"; $headers .= "X-Mailer: PHP\n"; $headers .= "From: \"".$your_name."\" <".$your_email.">\n"; if (!mail($email, $subject, $message, $headers)) { echo "Email failed!\nTry again"; show_form(); }else{ echo "<script language='javascript'>alert('Mail sent');</script>"; echo "<script language='javascript'>window.location='thankyou.htm';</script>"; }//end if }//end function /* show_form function */ function show_form($data='',$msg='') { //show the form for the email //the $data='' and $msg='' constructs allow for no information to be passed to the function //set defaults for function $subject = ''; $email = ''; $message = ''; $your_name = ''; $your_email = ''; //explode the string passed back from the send_mail function if there is an error if (($data !="" )&&($msg != "")) { $elements = explode("|",$data); $email = $elements[0]; $subject = $elements[1]; $message = $elements[2]; $your_email = $elements[3]; $your_name = $elements[4]; }//end if /* optional where clauses could include: 1. only active users 2. check to see if the user wants to allow contact from others on the site 3. only new users (signed up within a certain date) */ $sql = "SELECT * FROM contacts";//[optional where clause to show only people who choose to allow contact] $result = conn($sql); echo "<head><title>Make A Friend</title></head><body>\n"; echo "<table width='100%' cellpadding='0' cellspacing='0'>\n"; echo "<form name='email' action='".$_SERVER['PHP_SELF']."' method='post'>\n"; echo "<tr><td colspan='2' align='center'><h2>Email A Friend</h2></td></tr>\n"; echo "<tr><td colspan='2' align='center'> </td></tr>\n"; echo "<tr><td colspan='2' align='center' style='color:red; font-weight:bold;'>$msg</td></tr>\n"; //produce the email drop down if (mysql_num_rows($result)>0){ //produce the drop down list echo "<tr><td width='50%' align='right'>Name: </td><td><select name='email'>\n"; //optionally add MULTIPLE to allow sending to multiple addresses echo "<option value=''>Choose One</option>\n"; while ($rows = mysql_fetch_array($result)){ echo "<option value='".$rows['id']."'>".$rows['first_name'].' '.$rows['last_name']."</option>\n"; }//end while echo "</select></td></tr>"; }else{ //if there is a problem, have the user manually enter the email address echo "<tr><td colspan='2' align='center' style='color:red; font-weight:bold;'><br />Currently unable to locate email addresses. There maybe a problem with the database.</td></tr>"; echo "<tr><td colspan='2'> </td></tr>"; echo "<tr><td colspan='2' align='center' style='color:red; font-weight:bold;'>Please enter the email address manually</td></tr>\n"; echo "<tr><td width='40%' align='right'>Email Address: </td><td><input type='text' name='email' size='50' value='$email'></td></tr>\n"; }//end if echo "<tr><td align='right'>Subject: </td> <td><input type='text' name='subject' size='50' value='$subject'></td></tr>\n"; echo "<tr><td align='right' valign='top'>Message: </td> <td><textarea name='message' cols='25' rows='10'>$message</textarea></td></tr>\n"; echo "<tr><td align='right'>Your name: </td> <td><input type='text' name='your_name' cols='25' rows='10' value='$your_name' ></td></tr>\n"; echo "<tr><td align='right'>Your Email: </td> <td><input type='text' name='your_email' cols='25' rows='10' value='$your_email'></td></tr>\n"; echo "<tr><td colspan='2' align='center'><input type='submit' value='Send Email' name='submit'><input type='reset' value='Reset'></td></tr>\n"; echo "</form></table></body>\n"; }//end function /* db connection function */ function conn($sql) { $host = "localhost"; $user = "user"; $pass = "pass"; $db = "my_db"; //echo "commnecing connection to local db<br>"; if (!($conn=mysql_connect($host, $user, $pass))) { printf("error connecting to DB by user = $user and pwd=$pass"); exit; } $db3=mysql_select_db($db,$conn) or die("Unable to connect to local database"); $result = mysql_query($sql) or die ("Can't run query because ". mysql_error()); return $result; }//end function ?>