Remove the desired number from data - php

Question

I have a question about how can I delete the desired number from the img_ids. As you see in the table below the img_ids like 68,67,66,65,64, . I want to delete for example number 67, how can I do that with PHP. My mind is confused because of the commas :S.
<div class="delete" id="67">Delete Image</div>
Ajax
$("body").on("click", ".delete", function(){
var deleteimgid = $(this).attr("id");
var data = 'img='+deleteimgid;
$.ajax({
type: 'POST',
url: 'delete.php',
data: data,
cache: false,
beforeSend: function(){},
success: function(response){
}
});
});
delete.php
<?php
include_once 'inc.php';
if(isset($_POST['img'])){
$imgid = mysqli_real_escape_string($db, $imgid);
// Then what should be the query ?
// I am confused because of the commas.
}
?>

Answer 1

Even tho you should not store data like that, here a working approach:
$imgList = '12,23,45,56,67,78';
$imgid = 12;
$imgIds = explode(',', $imgList);
$imgIds = array_filter($imgIds, function ($item) use ($imgid) {
return $imgid != $item;
});
$imgList = implode(',', $imgIds);
print $ImgList; // prints 23,45,56,67,78
What it does:
Splitting the list of ids into an array by comma
Use array_filter to map over the array and remove the desired value
Implode the list again by comma
How you actually should/could store your data
As others have pointed out in the comments, you should normalize your database. Read more
You also could use a blob field instead of a text field, since PHP can handle blob data very easy using serialize/unserialize