PHP while loop - exclude most recent row? [closed]
I have a 开发者_StackOverflowPHP while loop that loads user comments - I need to exclude the most recent row in the database.
$sql = "SELECT c.trackid, c.comment, c.time, c.userid, u.id, u.username FROM
comments c
LEFT JOIN users u
ON u.id = c.userid
WHERE trackid='$trackid'
ORDER BY c.time DESC";
$i=1;
while ($row = mysql_fetch_assoc($result)) {
echo "<div class=\"commentDivs\">" . $row['time'] ."<br><br> " . $row['username'] . "<div class=\"userPostedComments\">" . $row['comment'] . "</div></div>";
}
How do I exclude the most recent row from the loop?
you can do it this way you will have to run 2 queries first to find the id of the latest comment ....
$sql = mysql_query("SELECT id FROM tbl_name ORDER BY id DESC");
$row = mysql_fetch_array($sql);
$latest_id = $row['id'];
This will give you the latest id and then you can run the next query like this
$sql1 = mysql_query("SELECT * FROM tbl_name WHERE id != '$latest_id' ORDER BY id DESC");
while($row1 = mysql_fetch_array($sql1))
{ }
and let us know what you trying to do , might be that will make your code more clean
If your query returns results sorted by most recent descending, you can do this on the query's side by specifying OFFSET 1
.
Alternately, you can use mysql_data_seek to move the row pointer however you need.
SELECT c.trackid, c.comment, c.time, c.userid, u.id, u.username FROM
comments c
LEFT JOIN users u
ON u.id = c.userid
WHERE trackid='$trackid'
AND c.time != ( SELECT max(c.time) FROM comments WHERE u.id = c.userid )
ORDER BY c.time DESC
please provide the database structure and the sql query so we can help , you can use ORDER BY id
or store the time as DATETIME
and ORDER BY time
in the sql query
You could use something as
$rows = array();
while ($row = mysql_fetch_array($result))
{
$rows[] = $row;
}
then you can easily use $rows as an array, and can step in a for-loop until count($rows)-1
like
for($i = 0; $i < count($rows) - 1 ; $i++)
{
print '<div class="commentDivs">' . $rows[$i]['time'] .'<br><br> ' . $rows[$i]['username'] . '<div class="userPostedComments">' . $rows[$i]['comment'] . '</div></div>';
}
EDIT: or you can jump over the specific line, if you hav not ordert them by the time...
or if you have it ordert DESC by the time yust modify my loop-header to
for($i = 1; $i < count($rows) ; $i++)
Here is a simple solution, using your current query:
for($i=1; $i < mysql_num_rows($result); $i++) {
mysql_data_seek($result, $i);
$row = mysql_fetch_assoc($result);
echo "<div class=\"commentDivs\">" . $row['time'] ."<br><br> " . $row['username'] . "<div class=\"userPostedComments\">" . $row['comment'] . "</div></div>";
}
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