Get intro image by ID from database (joomla)

I am trying to read the intro image from a joomla database. I have a list of products, that each need to show the intro image that matches the ID of the product.

//  content
$content            = "SELECT * FROM `snm_content` WHERE catid = 13";
$contentcon         = $conn->query($content);
$contentcr          = array();
while ($contentcr[] = $contentcon->fetch_array());

$img = $contentcr[0]['images'];

$plaatje = explode('/', $img);

$plaatje = explode('"', $plaatje[2]);

$plaatje = $plaatje[0];

$img = preg_replace('/[^a-zA-Z0-9']/', '_', $img);

$img = explode('___', $img);

$img = $img[1];

Then in a foreach I put the following code:

<img src="cms/images/website/'.$plaatje.'" alt="" class="company_logo">

This shows the same image for every product though.

I read something about json_decode to get the image path from the database field.

How can I get the correct image for every product?

The following code prints the correct array:

print_r($content['images']);

Example of a field in the database with all the possible images (intro, full etc)

{"image_intro":"images/website/Airco_blog.jpg","float_intro":"","image_intro_alt":"","image_intro_caption":"","image_fulltext":"","float_fulltext":"","image_fulltext_alt":"","image_fulltext_caption":""}

Answer

I guess this will work for you :

$article_images = $content['images']      // Get image parameters of the article

$pictures = json_decode($article_images); // Split the parameters apart

echo "<img src='" . $pictures->{'image_intro'} . "' alt='" . $pictures->{'image_intro_alt'} . "'>"; // get the intro image

// Edited your post to fix the image tag.

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Answer