embedded PHP preventing scrolling - php

Question

so I am using an HTML template, and have a dynamic table generated by PHP. For whatever reason, when I add the php table in, I can no longer scroll on the page. I am wondering if there is some work around, or there is something I should be looking for in the template CSS to fix this.
Here is my HTML with the embedded PHP:
<div class="block-head">
<h2>Datatable All Features</h2>
</div>
<div class="block-content np">
<table cellpadding="0" cellspacing="0" width="100%" class="table table-bordered table-striped sortable">
<thead>
<tr>
<th><input type="checkbox" class="checkall"/></th>
<th width="25%">Name</th>
<th width="25%">Gender</th>
</tr>
</thead>
<tbody>
<?php
while ($row = mysql_fetch_array($query)) {
echo "<tr>";
echo "<td>" . $row[username] . "</td>";
echo "<td>" . $row[gender] . "</td>";
echo "</tr>";
}
?>
</tbody>
</table>
</div>
Here is my query, which I have above my HTML, for whatever it's worth. I know it's deprecated (just not a top priority right now):
$query = mysql_query("SELECT * FROM markerfollowing WHERE markerID = '$markerid'"); //query
When I remove the php in the table, it scrolls fine. When I put it back, no dice.
Sincere thanks for any help!
Here is my solution:
<?php
while ($row = mysql_fetch_array($query)) {
echo "<tr>";
echo "<td>" . '<input type="checkbox" name="checkbox"/>' . "</td>";
echo "<td>" . $row['username'] . "</td>";
echo "<td>" . $row['gender'] . "</td>";
echo "<td>" . $row['username'] . "</td>";
echo "<td>" . $row['gender'] . "</td>";
echo "</tr>";
}
?>

Answer 1

It's probably an error 500 which you cannot see because of your PHP.ini configuration.
change the $row[username] to $row['username'] and do the same with the gender.
This should do the job:
<?php
while ($row = mysql_fetch_array($query)) {
echo "<tr>";
echo "<td>" . $row['username'] . "</td>";
echo "<td>" . $row['gender'] . "</td>";
echo "</tr>";
}
?>