I was wondering if I could please have some help with a PHP issue I'm having?I'm a beginner and I've been working on making a basic CMS as a personal project to build my skills with.It's all working so far, but on the admin page which updates the site, I'm having a problem with the updating part.The page is populated by DB information, and it is updating when I choose to submit the update form. But if I only alter the text and don't re-select an image, or update the form without choosing a new image, the form sends an empty string to the database which erases the image that was there.
Here is the original code for the page:
<?php include("../core/db.php"); ?><?php if(isset($_GET['page'])){ $page=$_GET['page'];} else { $page="home";}?><?php////Select from DB query$query="(SELECT * FROM pages WHERE page_title='{$page}')";$get_page_query=mysqli_query($connection,$query);if(!$get_page_query){ die("Get page query problem" . mysqli_error($connection));}while($row=mysqli_fetch_assoc($get_page_query)){$page_title=$page;$page_content=$row['page_content'];$page_image=$row['page_image'];}?><!----Navigation----><table border="1"><tr height="50"><td colspan="2"><a href="admin.php?page=home">Home</a> | <a href="admin.php?page=about_us">About us</a> | <a href="admin.php?page=about_our_style">About our style</a> | <a href="admin.php?page=fees">Fees</a> | <a href="admin.php?page=time_table">Time table</a> | <a href="admin.php?page=gallery">Gallery</a> | <a href="admin.php?page=contact">Contact</a></td> </tr></table><!----Update form----><form method="post" action="" enctype="multipart/form-data"><p>Page Image<br/><input type="file" class="form-control" name="image"></p><img src="../images/<?php echo $page_image; ?>" width="300"><p>Page Content<br/><textarea name="page_content" type="text" rows="10" cols="100"><?php echo $page_content; ?></textarea></p><p><input type="submit" name="update" value="update"/></p></form><?php////Update queryif(isset($_POST['update'])){ echo "Update posted"; $page_content=$_POST['page_content']; $page_image=$_FILES['image']['name']; $page_image_tmp=$_FILES['image']['tmp_name']; move_uploaded_file($page_image_tmp, "../images/$page_image"); $query="UPDATE pages SET page_image='{$page_image}', page_content='{$page_content}' WHERE page_title='{$page}'"; $update_page_query=mysqli_query($connection,$query); if(!$update_page_query){ die("Update query problem" . mysqli_error($connection)); }header("location:admin.php?page={$page}");}?>I've spent a few hours on this but I can't work out how to fix it.Any help would be greatly appreciated.Thank you for any help.I've tried writing an if statement to fix it but it doesn't do anything at all:
if(empty($_FILES['image']['name'])){ $page_image=$row['page_image']; } else { $page_image=$_FILES['image']['name']; $page_image_tmp=$_FILES['image']['tmp_name']; move_uploaded_file($page_image_tmp, "../images/$page_image"); }