Nested while loop in PHP in getting data from database - php

Question

<?php
$sqlquerypmenu = "select *
from subsubmenu
where submenu_id=1
and position='left'
and status=1";
if($querypmenu = sqlsrv_query($conn,$sqlquerypmenu)){
if(sqlsrv_has_rows($querypmenu) === true){
while($rowdata = sqlsrv_fetch_array($querypmenu, SQLSRV_FETCH_ASSOC)){
?>
<h4 class="title-small folder_name"> <?php echo $rowdata ['website_title']; ?> </h4>
<?php
$id = $rowdata['id'];
$filequerymenu = "select *
from upload_files
where main_menu='value_name'
and sub_menu='value_key'
and subsub_menu= $id ";
if($filemenu = sqlsrv_query($conn,$filequerymenu)){
if(sqlsrv_has_rows($filemenu) === true){
while($filedata = sqlsrv_fetch_array($filemenu, SQLSRV_FETCH_ASSOC)){ ?>
<a class="smalltext font_val" href="<?php echo DOCUMENT_URL.$filedata ['file_name']; ?> " target="_blank" ><?php echo $filedata['document_name']; ?></a>
<?php
}
}
}
}
}
}
?>
In the nested while loop the second while loop only shows the first row of data and does not show the rest of the data.
How can I fix this?

Answer 1

Consider querying the database once with one JOIN query. Possibly opening up another fetch within a while loop causes instances issues:
<?php
...
$sql = "select s.website_title, u.file_name, u.document_name
from upload_files u
inner join subsubmenu s ON u.subsub_menu = s.id
where u.main_menu = 'value_name'
and u.sub_menu = 'value_key'
and s.submenu_id = 1
and s.[position] = 'left'
and s.[status] = 1
order by s.id, s.website_title;"
$title = "";
if($result = sqlsrv_query($conn, $sql)){
if(sqlsrv_has_rows($result) === true){
while($rowdata = sqlsrv_fetch_array($result, SQLSRV_FETCH_ASSOC)){
if($title != $rowdata['website_title']) {
$title = $rowdata['website_title']
?>
<h4 class="title-small folder_name"> <?php echo $rowdata ['website_title']; ?> </h4>
<?php
}
?>
<a class="smalltext font_val" href="<?php echo DOCUMENT_URL.$filedata ['file_name']; ?> " target="_blank" ><?php echo $filedata['document_name']; ?></a>
<?php
}
}
}
?>