hiding a slider image in php - php

Question

I am creating a property website from a database with PHP. On the description of each property listed has a slider of up to 10 images/slides. However, if there are only 6 images/slides for example; i would like to hide the remaining 6 images/slides from showing.
Here is what i have so far;
$sql = DB::getInstance()->query('SELECT * FROM listings WHERE id =' . Input::get('id'));
foreach($sql->results() as $row) {
<div id="property-slider">
<section class="slider">
<div class="flexslider">
<ul class="slides">
<li>
<figure>
<img src="admin/<?php echo $row->img_set_1 ?>" alt="<?php echo $row->alt ?>">
</figure>
</li>
<li>
<figure>
<img src="admin/<?php echo $row->img_set_2 ?>" alt="<?php echo $row->alt ?>">
</figure>
</li>
<li>
<figure>
<img src="admin/<?php echo $row->img_set_3 ?>" alt="<?php echo $row->alt ?>">
</figure>
</li>
<li>
<figure>
<img src="admin/<?php echo $row->img_set_5 ?>" alt="<?php echo $row->alt ?>">
</figure>
</li>
<li>
<figure>
<img src="admin/<?php echo $row->img_set_6 ?>" alt="<?php echo $row->alt ?>">
</figure>
</li>
<li>
<figure>
<img src="admin/<?php echo $row->img_set_7 ?>" alt="<?php echo $row->alt ?>">
</figure>
</li>
<li>
<figure>
<img src="admin/<?php echo $row->img_set_8 ?>" alt="<?php echo $row->alt ?>">
</figure>
</li>
<li>
<figure>
<img src="admin/<?php echo $row->img_set_9 ?>" alt="<?php echo $row->alt ?>">
</figure>
</li>
<li>
<figure>
<img src="admin/<?php echo $row->img_set_10 ?>" alt="<?php echo $row->alt ?>">
</figure>
</li>
</ul>
</div>
</section>
</div>
}
I am trying to get a result simular to this, but think repeating this 10 time etc etc, just think there is a better way
<?php
if(empty($row->img_set_1)) {
echo "";
} else {
echo "<li>";
echo "<figure>";
echo "<a href='#'><img src='{admin/$row->img_set_1}'></a>";
echo "</figure>";
echo "</li>";
}
?>
this is the function for the query
public function query($sql, $params = array()) {
$this->_error = false;
if($this->_query = $this->_pdo->prepare($sql)) {
$x = 1;
if(count($params)) {
foreach($params as $param) {
$this->_query->bindValue($x, $param);
$x++;
}
}
if($this->_query->execute()) {
$this->_results = $this->_query->fetchAll(PDO::FETCH_OBJ);
$this->_count = $this->_query->rowCount();
} else {
$this->_error = true;
}
}
return $this;
}
THIS IS AN UPDATE OF THE WORKING SLIDER---NOT IDEAL BUT IT WORKS
<?php
if(empty($row->img_set_1)) {
echo "";
} else {
echo "<li>";
echo "<figure>";
echo "<a href='#'><img src='admin/{$row->img_set_1}'></a>";
echo "</figure>";
echo "</li>";
}
if(empty($row->img_set_2)) {
echo "";
} else {
echo "<li>";
echo "<figure>";
echo "<a href='#'><img src='admin/{$row->img_set_2}'></a>";
echo "</figure>";
echo "</li>";
}
//This repeats etc etc
?>

Answer 1

You could do something like this:
$x = 1;
while($x<=10) {
if(!empty($row["img_set_$x"])) {
echo "<li>";
echo "<figure>";
echo "<a href='#'><img src=".'{admin/'.$row["img_set_$x"].'}'."</a>";
echo "</figure>";
echo "</li>";
}
$x++;
}