php - I can connect to mysql db but my table is not updating -

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i able connect mysql db have created table called attorney_users. know missing or doing wrong? have post function code below. when register user confirms success, table not updated.

<?php   require_once('appvars.php');   require_once('connectvars.php');    // connect database   $dbc = mysqli_connect(db_host, db_user, db_password, db_name);    if (isset($_post['submit'])) {     // grab profile data post     $username = mysqli_real_escape_string($dbc, trim($_post['username']));     $firstname = mysqli_real_escape_string($dbc, trim($_post['firstname']));     $lastname = mysqli_real_escape_string($dbc, trim($_post['lastname']));     $firmname = mysqli_real_escape_string($dbc, trim($_post['firmname']));     $email = mysqli_real_escape_string($dbc, trim($_post['email']));     $password = mysqli_real_escape_string($dbc, trim($_post['password']));     $password2 = mysqli_real_escape_string($dbc, trim($_post['password2']));      if (!empty($username) && !empty($password) && !empty($password2) && ($password == $password2)) {       // make sure isn't registered using username       $query = "select * attorney_users username = '$username'";       $data = mysqli_query($dbc, $query);       if (mysqli_num_rows($data) == 0) {         // username unique, insert data database         $query = "insert attorney_users (username, firstname, lastname, firmname, email, password, date) values ('$username', '$firstname', '$lastname', $firmname, $email, sha('$password'), now())";         mysqli_query($dbc, $query);          // confirm success user         echo '<p>your new account has been created. you\'re ready <a href="index.php">log in</a>.</p>';          mysqli_close($dbc);         exit();       }       else {         // account exists username, display error message         echo '<p class="error">an account exists username. please use different username.</p>';         $username = "";       }     }     else {       echo '<p class="error">you must enter of sign-up data, including desired password twice.</p>';     }   }    mysqli_close($dbc); ?> <div id="main-wrapper">             <div id="register-wrapper">                 <form method="post" action = "<?php echo $_server['php_self'];?>">                 <fieldset>                     <ul>                          <label for="username">username : </label>                          <input type="text" id="username" name = "username" value = "<?php if (!empty($username)) echo $username; ?>"  />                           <label for="firstname">first name : </label>                          <input type="text" id="firstname"  name = "firstname"  />                           <label for="lastname">last name : </label>                          <input type="text" id="lastname"  name = "lastname" />                           <label for="firmn">firm name : </label>                          <input type="text" id="firmname"  name = "firmname" />                           <label for="email">email : </label>                          <input type="text" id="email"  name = "email"  />                           <label for="password">password : </label>                          <input type="password" id="password"  name="password" />                           <label for="password2">verify password : </label>                          <input type="password" id="password2"  name="password2" />                          </li>                         <li class="buttons">                          <input type="submit" value="register" name="submit"  />                             <input type="button" name="cancel" value="cancel" onclick="location.href='index.php'" />                      </li>                     </ul>                 </fieldset>                 </form>             </div>         </div>      </body> </html>

date reserved in mysql, use ` around column name

$query = "insert attorney_users (`username`, `firstname`,  `lastname`, `firmname`, `email`, `password`, `date`)  values ('$username', '$firstname', '$lastname', $firmname,  $email, sha('$password'), now())";

and why using mysqli_real_escape_string escaping , can use prepared statement here.

edit

use checking error in query

$data = mysqli_query($dbc, $query) or die(mysqli_error());

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