Insert is only doing the first row [duplicate] - php

Question

This question already has answers here:
PHP Insert data from one table to another
(2 answers)
Closed 3 years ago.
I have a simple query that is returning some results from my database, it returns 4 rows, but when I do the insert it's only doing the first row and then stopping, does not seem to be doing an insert for each row that is returned from the first query.
$sql = "SELECT t.ID AS 'TopicID', t.seminar_id AS 'SeminarID', rl.resourceid AS 'ResourceID', r.ResourceType AS 'ResourceType'
FROM topic t
LEFT JOIN resourcelink rl ON rl.entityid = t.ID
LEFT JOIN resources r ON r.ResourceID = rl.resourceid
WHERE t.seminar_id = '124840'";
$result = mysql_query($sql);
// echo "<pre>";
// print_r($sql);
// echo "</pre>";
while($row = mysql_fetch_assoc($result))
{
$resourceID = $row['ResourceID'];
$resourceType = $row['ResourceType'];
if ($resourceID != '' && $resourceType != 1)
{
$sql_insert = "INSERT INTO resourcelink (resourceid, entityid, entitytype, linkorder, viewinplayer)
VALUES ($resourceID, $topicID, 1, 0, 0)";
$result = mysql_query($sql_insert);
}
}

Answer 1

The reason is that you're overwriting the $result variable when you do the first insert. So when the next iteration of the while loop calls mysql_fetch_assoc($result), it's fetching the result of the INSERT, not the result of the SELECT.
Since you never do anything with the result of the INSERT, there's no need to assign a variable. If you do need to use the result, you should use a different variable name. So change:
$result = mysql_query($sql_insert);
to
mysql_query($sql_insert) or die("Insert error: " . mysql_error());