Job Entrys Not Submitting to Database Table - php

Question

I have a forum where a user can enter in a job they are looking for which would be submitted to a database and then displayed on the following page. Only I can't get any of the data to upload, and I'm not sure why.
I'm also struggling with ways to error check. Any ideas?
// Check for job submission
if(isset($_POST['submit']))
//empty error array
$error = array();
// check for a things in the field
if(empty($_POST['job']))
{
$error[] = 'Please fill in all required fields';
}
// iff there are no errors, insert the job listing into the database.
// otherwies, display error.
if(sizeof($error) == 0)
{
// insert job listing
$query = "INSERT INTO job (
job_id,
user_id,
jobtitle,
company,
location,
summary,
responsibilities,
skills
) VALUES (
null,
'{$_SESSION['user_id']}',
'{$_POST['jobtitle']}',
'{$_POST['company']}',
'{$_POST['location']}',
'{$_POST['summary']}',
'{$_POST['responsibilities']}',
'{$_POST['skills']}',
NOW()
)";
$result = mysqli_query($dbc, $query) or die('Query failed: ' . mysqli_error($dbc));
// display a confirmation
echo "<div class=\"alert alert success\">Your job listing has been added</div>";
} else {
// display error message
foreach($error as $value)
{
echo "<div class=\"alert alert-danger\"{$value}</div>";
}
}
?>
<!-- Job listing Form -->
<form method="post" action="listings.php">
<div class="form-group">
<label> Job Title </label>
<input name ="jobtitle" type="text" class="jobform"/>
<label>Company/Organization</label>
<input name="company" type="text" class="jobform"/>
<label> Job Location </label>
<input name ="location" type="text" class="jobform"/>
<label> Job Responsibilities </label>
<textarea name="summary" rows="8" cols="20" class="jobfourm"></textarea>
<label> Job Responsibilities </label>
<textarea name="responsibilities" rows="8" cols="20" class="jobfourm"></textarea>
<label> Job Skills </label>
<textarea name="skills" rows="8" cols="20" class="jobforum"></textarea>
</div>
<div class="form-group">
<input name="submit" type="submit" value="Submit" class="btn btn-large btn-primary" />
</div>
</form>
</div>

Answer 1

My bets are on your query:
(
job_id,
user_id,
jobtitle,
company,
location,
summary,
responsibilities,
skills
) VALUES (
null,
'{$_SESSION['user_id']}',
'{$_POST['jobtitle']}',
'{$_POST['company']}',
'{$_POST['location']}',
'{$_POST['summary']}',
'{$_POST['responsibilities']}',
'{$_POST['skills']}',
NOW()
for what should be job_id, you're passing null. Now, I'm going to assume that all jobs must have a job ID, correct? You need to actually pass in a valid id, as I'm going to bet money (or rep) that that's a non nullable field in the table. Additionally, you've added a column in your values that you have not declared in your column name parameter.