Extracting image value from Array in Codeigniter - php

Question

I'm having issues extracting a value from an array of images via Codeigniter/MySQL. So i have a table called "image" in my database and if i echo out it i get the following code:
{"f01efdf6fe3b2bb387d3094aa701203f":{"filename":"f01efdf6fe3b2bb387d3094aa701203f.jpg","alt":"","caption":"","primary":true},"b11581adadd1848acb2898e7a284afc1":{"filename":"b11581adadd1848acb2898e7a284afc1.png","alt":"","caption":""},"2cfee6d3c334696833b1cfe13910fcf1":{"filename":"2cfee6d3c334696833b1cfe13910fcf1.png","alt":"","caption":""}}
As you can see there are 3 images there, what i need is to echo out just the image where "primary" value is:true within a foreach loop...
EDIT:
<?php
$query = $this->db->query("SELECT * FROM offers_products WHERE offer_large LIMIT 5;");
?>
<?php foreach ($query->result() as $row): ?>
<li><?=$row->id?></li>
<li><?=$row->name?></li>
<li><!-- THIS IS THE IMAGES TABLE VALUE --> <?=$row->images?> <!-- --></li>
<li><?=$row->description?></li>
<?php endforeach; ?>

Answer 1

Maybe:
$array = json_decode($stringFromDatabase, true);
$primary = false;
foreach ($array as $longStringDontCare => $imageArray) {
if (!empty($imageArray['primary'])) {
$primary = $imageArray;
break;
}
}
if ($primary) {
echo $primary['filename'];// should give: f01efdf6fe3b2bb387d3094aa701203f.jpg
}
To give you one last hint:
<?php
function getPrimaryImageFromJsonString($stringFromDatabase) {
$array = json_decode($stringFromDatabase, true);
$primary = false;
foreach ($array as $longStringDontCare => $imageArray) {
if (!empty($imageArray['primary'])) {
$primary = $imageArray;
break;
}
}
if ($primary) {
return $primary['filename'];
}
return null;
}
?>
<?php foreach ($query->result() as $row): ?>
<li><?=$row->id?></li>
<li><?=$row->name?></li>
<li><?php echo getPrimaryImageFromJsonString($row->images);?></li>
<li><?=$row->description?></li>
<?php endforeach; ?>
L.E: a few edits.

Answer 2

You have to first decode the json encoded string and extract the primary image from there:
Here is small function which you can use to extract the primary image:(You can place this function in Helper if you are using CodeIgniter)
function get_primary_image($encode_json_data)
{
$primary_image = '';
$decoded_json = json_decode($encode_json_data);
foreach($decoded_json as $obj)
{
if(isset($obj->primary) && $obj->primary == 1)
$primary_image = $obj->filename;
}
return $primary_image;
}
You can call above function in your view in following way:
<?php foreach ($query->result() as $row): ?>
<li><?=$row->id?></li>
<li><?=$row->name?></li>
<li> <?=get_primary_image($row->images)?></li><!-- Here, you call above function -->
<li><?=$row->description?></li>
<?php endforeach; ?>