How to select the id - php

Question

I have a problem on selecting an id on div. I use a while loop on my div.
So i'am creating a unique ID using the id row on my sql. My question is, is it possible to select the id using Javascript? I use bootstrap modal to update my information details (i dont actually know how to ask this question because my english is poor).
example:
while($row = mysqli_fetch_array($result)) {
<div id="'details-'<?php echo $row['Room_ID'];?>">
//code
</div>
}

Answer 1

To fix your Php code:
while($row = mysqli_fetch_array($result)) {
echo "<div id='details-" . $row['Room_ID'] ."'>";
// CODE
echo "</div>";
}
The problem you got in the id, where you stopped the value by ' already, so the result was something like:
<div id='details-'28>//Code</div> and fixed to <div id='details-28'>//Code</div>
and to select the ID with pure JavaScript use document.getElementById( ID )
If you are not sure of the ID and you just wanna select all items, add a class to the item and select them all by document.getElementsByClassName
So to select all your stuff by javascript:
1) Add into your PHP code class called "details"
2) Create a javascript to select all items with the class name "details"
3) Do a foreach loop for the selected items and split them by "-" to devide the "details" from the actual ID
4) Do whatever you want now with the ID
Practical showcase:
Php:
while($row = mysqli_fetch_array($result)) {
echo "<div class='details' id='details-" . $row['Room_ID'] ."'>";
// CODE
echo "</div>";
}
JavaScript:
<script>
var itemDetails = document.getElementsByClassName("details");
for(var i = 0; i < itemDetails.length; i ++) {
var ID = itemDetails[i].getAttribute("id").split("-")[1];
// Now you got the ID stored in the variable ID
</script>
Here you got an example on JSFiddle

Answer 2

As for as my understanding from your code, you are want to create a div with id details from your database. For that you should correct your code as given blew
<?php
while($row = mysqli_fetch_array($result)) {
echo "<div id='details-'". $row['Room_ID'];">";
//code
echo "</div>";
}
?>
If it is problem to select it and perform some manipulations using jQuery/javascript you may consult the official API documentation at
This link