I can't store the data into MySQL - php

Question

So I have this form. I would like to store the data into my database. However, it's not and there is no error log. I would really appreciate help, as it's due in 2 days and I've been trying for the past week or so.
<form enctype="multipart/form-data" action="preview.php" method="post" class="f">
<p>
<p>
<p><label for="name">Teacher's Name:</label>
<input type="text" style="font-family:Gloria Hallelujah" size="35" name="name" id="name" autofocus required></p>
<p><label for="name">Title:</label>
<input type="text" style="font-family:Gloria Hallelujah" size="35" name="title" id="title" autofocus required></p>
<p><label for="done">Done By:</label>
<input type="text" style="font-family:Gloria Hallelujah" size="35" name="done" id="done" required></p>
<p><label for="no">Class:</label>
<input type="text" style="font-family:Gloria Hallelujah" size="15" name="class" id="no" required></p>
<p><label for="sch">School:</label>
<select name="sch">
<option value="seg">School of Engineering (SEG)</option>
<option value="sit">School of Information Technology (SIT)</option>
<option value="sdn">School of Design (SDN)</option>
<option value="sbm">School of Business Management (SBM)</option>
<option value="shs">School of Health Sciences (SHS)</option>
<option value="scl">School of Chemical & Life Sciences (SCL)</option>
<option value="sidm">School of Interactive and Digital Media (SIDM)</option>
</select>
<p><label for="msg">Show your Gratitude! :</label>
<textarea class="tarea" maxlength="3000" cols="38.5" rows="6" name="comments" placeholder="Enter Message here..." required></textarea>
<p class="limit">Char limit: 3000 chars.</p>
</p>
And it goes to preview.php where it is supposed to store the data.
<?php
include "mysqli.connect.php";
include "fbmain.php";
$sql = "INSERT INTO table(teacherName, title, doneBy, studentClass, school, message)VALUES ('$_POST[name]','$_POST[title]','$_POST[done]','$_POST[class]','$_POST[comments]') where facebookId = '".$me['id']."'";

Answer 1

INSERT command does not need WHERE clause .
P.S : You are wide open to SQL Injection.

Answer 2

('$_POST[name]','$_POST[title]','...
Change to:
('{$_POST[name]}','{$_POST[title]}','...
this is better
see http://ir1.php.net/mysqli_query
And check Database And check WHERE structs
You can Display Errors And Fix them By Put this code After Query
if (mysqli_connect_errno()) {
echo mysqli_connect_error();
exit();
}

Answer 3

$_POST[name] isn't the same as $_POST['name'], $_POST[title] isn't the same as $_POST['title'] etc.
Instead of:
$sql = "INSERT INTO table(teacherName, title, doneBy, studentClass, school, message)VALUES ('$_POST[name]','$_POST[title]','$_POST[done]','$_POST[class]','$_POST[comments]') where facebookId = '".$me['id']."'";
try
$name = $_POST['name'];
$title = $_POST['title'];
$done = $_POST['done'];
$class = $_POST['class'];
$comments = $_POST['comments'];
$sql = "INSERT INTO table(teacherName, title, doneBy, studentClass, school, message)VALUES ('{$name}','{$title}','{$done}','{$class}','{comments}') where facebookId = '".$me['id']."'";
But above is just to get it to work!
It isn't the recommended way of doing this. You should do it with parametized queries... http://forum.codecall.net/topic/44392-php-5-mysqli-prepared-statements/