PHP submit button not working right -

    <div class="contact-forum">      <h1>contact forum</h1>     <div class="contact-enters">     <form action="home.php" method="post">         <div class="firstname">             <p>first name:</p> </div>  <input type="text" name="firstname" placeholder="firstname" /> <br />          <div class="lastname">             <p> lastname: </p></div> <input type="text" name="lastname" placeholder="lastname" /> <br />          <div class="email">             <p> email: </p></div>  <input type="text" name="email" placeholder="e-mail" /> <br />          <div class="topic">             <p>topic: </p> </div><input type="text" name="topic" placeholder="topic" /> <br />        <div class="message">         <p> message: </p> </div> <div class="message-box"><input type="text" name="message" /></div> <br />           <input type="submit" name="send" />     </form>     </div> </div>  <div class="php"> <?php  $con = mysqli_connect("localhost", "kylelongrich", "cash7144") or die('can not connect server');  mysqli_select_db($con,"kylelongrich") or die("could not connect database");   if(isset($_post['send'])) {  $firstname = strip_tags($_post['firstname']); $lastname = strip_tags($_post['lastname']); $email = strip_tags($_post['email']); $topic = strip_tags($_post['topic']); $message = strip_tags($_post['message']);  $email_query = mysqli_query($con,"select email emailquestions email ='$email'") or die("could not check email"); $count_email = mysqli_num_rows($email_query);  if ($count_email > 0) {     echo 'your email alread in use'; }   $sql = "insert emailquestions (firstname, lastname, email, subject, message) values ('$firstname','$lastname','$email','$topic','$message')";  mysqli_query($con, $sql);  $message = 'your message has been sent';  }   $message='';    ?> 

when being displayed submit button when hit won't send or work @ all. no php code errors come not work properly. because of the styling? great

try else after if statement, , use set in query.

if ($count_email > 0) { echo 'your email alread in use'; } else { $sql = "insert emailquestions set           (firstname, lastname, email, subject,     message) values         ('$firstname','$lastname','$email','$topic','$message')";  mysqli_query($con, $sql);  $success_message = 'your message has been         sent'; echo $success_message; } 

hope helps