gallery.php

<?php
function deleteImg() {
	$xml = simplexml_load_file("gallery.xml");
	$sxe = new SimpleXMLElement ($xml->asXML());
	
	$delete = $_POST["deleteImage"];
	
	$path = $_POST["path"];
	
	unset($sxe->xpath("image[@id='".$delete."']")[0]->{0});
	$sxe->asXML("gallery.xml");
	
	if (file_exists($path)) {
		unlink($path);
	}
}

function addImage(){	
	$originalFileName = basename($_FILES["fileToUpload"]['name']);
	$fileExtension = pathinfo($originalFileName, PATHINFO_EXTENSION);
	$newFileName = uniqid().'.'.$fileExtension;

	$target_dir = "uploads/";
	$target_file = $target_dir . $newFileName;
	$uploadOk = 1;
	$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
	// Check if image file is a actual image or fake image
	if(isset($_POST["submit"])) {
	    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
	    if($check !== false) {
	        $uploadOk = 1;
	    } else {
	        echo "File is not an image.";
	        $uploadOk = 0;
	    }
	}
	// Check if file already exists
	if (file_exists($target_file)) {
	    echo "Sorry, file already exists.";
	    $uploadOk = 0;
	}
	// Allow certain file formats and check if file is to big
	if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
	&& $imageFileType != "gif" && $_FILES["fileToUpload"]["size"] > 50000000) {
	    echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed or your file is too large.";
	    $uploadOk = 0;
	}
	// Check if $uploadOk is set to 0 by an error
	if ($uploadOk == 0) {
	    echo "Sorry, your file was not uploaded.";
	// if everything is ok, try to upload file
	} else {
	    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
	        
	        // Generates a new id for the new Node.
			$xml = simplexml_load_file("gallery.xml");
			$images = new SimpleXMLElement($xml->asXML());
			$item = $images->count();
			if ($item != 0) {
				$xmlIds = array();
				foreach ($images as $image) {
					$nodeId = (int)$image->attributes();
					$xmlIds[] = $nodeId;
				}
				$arrayId = $item - 1;
				$lastXMLIdUsed = $xmlIds[$arrayId];
				$newId = $lastXMLIdUsed + 1;
			}else{
				$newId = 0;
			}

			// Add text, image etc to the XML file
		    $image = $xml->addChild("image");
		    $image->addAttribute("id", $newId);
		    $image->addChild("title", $_POST["fileName"]);
		    $image->addChild("date", $_POST["fileDate"]);
		    $image->addChild("text", $_POST["fileText"]);
		    $image->addChild("path", $target_file);

		    $xml->asXML("gallery.xml");
	        

	    } else {
	        echo "Sorry, there was an error uploading your file.";
	    }
	}
}