SQL Error: 'Fatal Error' - php

Question

I am trying to output some minutes 7 days after a meeting has taken place. I have inserted in the following code only to get a fatal error message.
<?php
$id = $_GET['meeting_id'];
$from = date( 'Y-m-d', strtotime( $row['date_update'] . '-7 days' ) );
$result = $this->db->get ('SELECT * FROM Meetings INNER JOIN Minutes ON Minutes.meeting_id = Meetings.meeting_id WHERE Rooms.date >= "' . $from . '" AND Rooms.date <= NOW() AND Minutes.meeting_id = $id')
or die(mysql_error());
if (mysql_num_rows($result) == 0) {
echo '<h3>There Arent Any Minutes For This Meeting Yet</h3>';
} else {
while($info = mysql_fetch_array($result))
{
echo "<tr>";
echo "<td><br/>" .'Title: '. $info['title']." </td>";
echo "<td><br/><br/>" .'Subject: '. $info['subject']. "</td>";
echo "<td><br/><br/>" .'Next Subject: '. $info['next_subject']."</td>";
echo '<br/><br/>Attendees';
echo ' | Apologies';
}
}
echo "</tr>";
echo "</table>";
?>
the error message i am getting is as follows:
Fatal error: Using $this when not in object context in E:\webareas\hj942\CW\meetings\conference\viewminutes.php on line 59
line 59 is the query at $result.
anyone?

Answer 1

"$this" is used inside a Class to refer to itself. As you're not inside a class, the php script produces an error. Use mysql_query() instead, and of course you'll need to connect to your DB first

Answer 2

You are using $this->db on the 5th line of your code and it's not a object context. You probably want to use $db, but also you need to initiate db connection on $db variable for it to work.

Answer 3

First, establish a MySQL connection:
$db = mysql_connect('db_host', 'db_user', 'db_password');
Then, use $db variable with the mysql_query() function instead of $this->db->get:
$result = mysql_query($db, 'SELECT * FROM Meetings INNER JOIN Minutes ON Minutes.meeting_id = Meetings.meeting_id WHERE Rooms.date >= "' . $from . '" AND Rooms.date <= NOW() AND Minutes.meeting_id = $id')
Or even without the $db variable (if you use only one database):
$result = mysql_query('SELECT * FROM Meetings INNER JOIN Minutes ON Minutes.meeting_id = Meetings.meeting_id WHERE Rooms.date >= "' . $from . '" AND Rooms.date <= NOW() AND Minutes.meeting_id = $id')