一个文档中有多个mysql_query请求

Question

I have a PHP document opening a connection to a database. Everything works fine - but as soon as I add one additional mysql_query request to the document, the mySQL server responds with a 500 internal server error.

Any idea why? Is there a reason that I cannot have multiple mysql_query requests in the one document?

thanks very much!

The offending PHP code is here (most of the echos are there for debugging reasons)

<?php
$q=$_GET["q"];

$con = mysql_connect('address.com', 'database', 'password');
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("sql01_5789willgil", $con);

$sql1="SELECT * FROM place WHERE title = '".$q."'";
$result1 = mysql_query($sql1);
$row = mysql_fetch_array($result1);
$id=$row+1;


$sql2="SELECT * FROM place WHERE title = '".$q."'";

$result2 = mysql_query($sql2);

echo "<table border='1'>
<tr>
<th>Firstname</th>
<th>Lastname</th>
<th>Age</th>
<th>Hometown</th>
<th>Job</th>
</tr>";

while($row = mysql_fetch_array($result2))
  {
  echo "<tr>";
  echo "<td>" . $row['title'] . "</td>";
  echo "<td>" . $row['description'] . "</td>";
  echo "<td>" . $row['latitude'] . "</td>";
  echo "<td>" . $row['longitude'] . "</td>";
  echo "<td>" . $row['image'] . "</td>";
  echo "</tr>";
  }
echo "</table>";


echo "ID equals " . $id;
echo "row equals " . $row;

mysql_close($con);
?>

Answer 1

$sql1="SELECT * FROM place WHERE title = '".
mysql_real_escape_string($q, $con)."'"; <-- please escape

$result1 = mysql_query($sql1, $con);    <-- always specify link identifier

if ($result1)
{
  $row = mysql_fetch_array($result1);  <-- always check result exist before fetch
}