Error Querying database when insert PHP code is executed - php

Question

I've been tinkering with my PHP code to insert data into a SQL table and I always get ERROR QUERYING DATABASE. The values are coming from a normal HTML form and and then when I hit submit (action=memberadd.php) I get the error message from the code below. I'm missing something but can't see what it is????
<?php
$first_name = $_POST['first_name'];
$last_name = $_POST['last_name'];
$city = $_POST['city'];
$state = $_POST['state'];
$country = $_POST['country'];
$industry = $_POST['industry'];//only showing one - need to fix
$profile_visibility = $_POST['profile_visibility'];
$position = $_POST['position'];
$status = $_POST['status'];
$profile_link = $_POST['profile_link'];
$skills = $_POST['skills'];
//connects and sends information to the database
$dbc = mysqli_connect('localhost', 'root', 'root', 'main') or die('Error connecting to MySQL server.');
//inserts data into the member_details table main db
$query = "INSERT INTO 'member_details' (first_name, last_name, city, state, country, industry, profile_visibility, position, status, profile_link, skills)
VALUES ('$first_name', '$last_name', '$city', '$state', '$country', '$industry', '$profile_visibility', '$position', '$status', '$profile_link', '$skills')";
$result = mysqli_query($dbc, $query) or die('Error querying database.');
mysqli_close($dbc);
echo '<h2>Here are your details.</h2>';
echo '<h3>First Name: '.$first_name.'<br />';
echo '<h3>Last Name: '.$last_name.'<br />';
echo 'City: '.$city.'<br />';
echo 'State: '.$state.'<br />';
echo 'Country: '.$country.'<br />';
echo 'Industry: '.$industry.'<br />';//only showing one - need to fix
echo 'Profile: '.$profile_visibility.'<br />';
echo 'Position: '.$position.'<br />';
echo 'Status: '.$status.'<br />';
echo 'Link: '.$profile_link.'<br />';
echo 'Skills: '.$skills.'<br /></h3>';
?>

Answer 1

The Problem
As #Fred -ii- has noted the problem is with the quotes being around the table name in your INSERT statement.
$query = "INSERT INTO 'member_details' (first_name, ...
^ ^
The solution
If you wish to 'quote' table or column names, you should use backticks which you can read more about on the MySQL documentation page.
$query = "INSERT INTO `member_details` (first_name, ...
Detecting errors
To check a MySQLi database request for errors there are a few methods that can be used to get error information. Probably the most useful is mysqli_error() which will give you an error string.
$result = mysqli_query($dbc, $query);
if(!$result)
{
printf("Errormessage: %s\n", mysqli_error($dbc));
}
As #Fred -ii- also mentioned you should use error reporting correctly when developing new code. Ideally you should configure this in your php.ini, but it can also easily be done by adding the following to the top of your page(s).
error_reporting(E_ALL);
ini_set('display_errors', 1);
Finally, you're wide open to SQL Injection Attacks. You should look into using prepared statements with MySQLi to help prevent this.

Answer 2

You can use mysql query like...
$query = "INSERT INTO `member_details` SET first_name = '".$first_name."', last_name = '".$last_name."', city = '".$city."', state = '".$state."', country = '".$country."', industry = '".$industry."', profile_visibility = '".$profile_visibility."', position = '".$position."', status = '".$status."', profile_link = '".$profile_link."', skills = '".$skills."'";