使用PHP从数据库中获取数据

Question

I have tried to fetch data from priority table of elective_mgmt database.The source code is given below :

<?php
    $connect = mysql_connect("localhost","root","");
    mysql_select_db("elective_mgmt",$connect);
    $result = mysql_query($con,"SELECT * FROM priority");
        echo "<table border='1'>
`<tr>
<th>Name</th>
<th>Roll</th>
<th>Email</th>
<th>Priorityone</th>
<th>Prioritytwo</th>
<th>Prioritythree</th>
</tr>";
while($row = mysql_fetch_array($result))
  {
  echo "<tr>";
  echo "<td>" . $row['Name'] . "</td>";
  echo "<td>" . $row['Roll'] . "</td>";
  echo "<td>" . $row['Email']. "</td>";
  echo "<td>" . $row['Priorityone']."</td>";
  echo "<td" . $row['Prioritytwo']."</td>";
  echo "<td" . $row['Prioritythree']."</td>"; 
  echo "</tr>";
  }
echo "</table>";

mysql_close($con);
?>

 ?>

When I run it ,it displays like this:

Warning: mysql_query() expects parameter 2 to be resource, string given in C:\xampp\htdocs\Elective_management\admin_view.php on line 5

Warning: mysql_fetch_array() expects parameter 1 to be resource, null given in C:\xampp\htdocs\Elective_management\admin_view.php on line 15
Name    Roll    Email   Priorityone Prioritytwo Prioritythree

Warning: mysql_close() expects parameter 1 to be resource, null given in C:\xampp\htdocs\Elective_management\admin_view.php on line 28
?>

I didn't get any idea. Please help me.

Answer 1

you parameter order to mysql_query is incorrect. First the query then the connection.

mysql_query("SELECT * FROM priority", $connect);