ethics-canvas/canvas/php/check-comments.php

<?php
    require_once("../../php/db_utils.php");

    try {
        // Connect to the database
        $database = db_connect();
        
        // Incoming data
        $canvasId = $_POST["canvas_id"];
        $ideaId = $_POST["idea_id"];
        
        // Declare query
        $query = 'SELECT id
                  FROM comments
                  WHERE canvas_id = "' . $canvasId . '"
                  AND idea_id = "' . $ideaId . '";';
                    
        // Run query
        $recordSet = db_query_return($database, $query);
        
        // Get comments by active user
        $comments = Array();
        
        while($record = $recordSet->fetch_assoc()) {
            $comments[] = $record["id"];
        }
        
        mysqli_free_result($recordSet);
        
        echo(json_encode($comments));
        
        // Close the connection to the database
        db_close($database);
    }
    catch(Exception $e) {
        $errorMsg = $e->getMessage();
        print_r($errorMsg);
    }
?>