php mysql select from columns from 2 tables Join - php

Question

I have two tables.
visitors_details, with id,scanner_id,time columns
and visitors_info with scanner_id, name,surname columns
I want to get back
id,name,surname,time in a table
i have written this but is not working
$result = mysql_query("SELECT visitors_details.id AS id,
visitors_info.name AS name, visitors_info.surname AS surname, visitors_details.time
AS time FROM visitors_details AS d LEFT JOIN visitors_info AS i ON
d.scanner_id=i.scanner_id ");
echo "<table border='1'>
<tr>
<th>id</th>
<th>name</th>
<th>surname</th>
<th>Time</th>
</tr>";
while($row = mysql_fetch_array($result))
{
echo "<tr>";
echo "<td>" . $row['id'] . "</td>";
echo "<td>" . $row['name'] . "</td>";
echo "<td>" . $row['surname'] . "</td>";
echo "<td>" . $row['time'] . "</td>";
echo "</tr>";
}
echo "</table>";
any ideas??

Answer 1

Its better to enable some debugging for your code like this:
<?php
error_reporting(E_ALL);
$sql = "
SELECT d.id AS id, i.name AS name, i.surname AS surname, d.time AS time
FROM visitors_details AS d
LEFT JOIN visitors_info AS i ON d.scanner_id=i.scanner_id
";
$result = mysql_query($sql);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
?>

Answer 2

try this query
$result = mysql_query("SELECT d.id , i.name , i.surname , d.time
FROM visitors_details AS d LEFT JOIN visitors_info AS i
ON d.scanner_id=i.scanner_id ");

Answer 3

Add this to catch errors. saves a lot of time:
if(!$result) {
echo mysql_error();
}