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I have a script that resizes and uploads an image. It works great. Now I would like to add a new function to it that will detect if there is a duplicate image already posted. If there is, it will not upload the image. I have found a script that has that function. I am just a little lost on how to incorporate that into my php code. Here is my image upload/resize code. if(Input::exists()) { if(Token::check(Input::get('token'))) { // Setting up image folders based on user id $userDir= 'images/'.$userid.'/'; if(!is_dir($userDir)){ mkdir('images/'.$userid.'/', 0775); } else { // Uploading image with resize and crop. if(isset($_FILES['image'])) { if (empty($_FILES['image']['name'])) { $error = 'Please choose an image!'; } else { function swapHW() { global $height, $width, $newheight, $newwidth; $tempHeight = $height; $tempWidth = $width; $height = $tempWidth; $width = $tempHeight; $tempHeight = $newheight; $tempWidth = $newwidth; $newheight = $tempWidth; $newwidth = $tempHeight; } function getOrientedImage($imagePath){ $image = imagecreatefromstring(file_get_contents($imagePath)); $exif = exif_read_data($imagePath); if(!empty($exif['Orientation'])) { switch($exif['Orientation']) { case 8: $image = imagerotate($image,90,0); swapHW(); break; case 3: $image = imagerotate($image,180,0); break; case 6: $image = imagerotate($image,-90,0); swapHW(); break; } } return $image; } $name = $_FILES['image']['name']; $temp = $_FILES['image']['tmp_name']; $type = $_FILES['image']['type']; $size = $_FILES['image']['size']; $ext = strtolower(end(explode('.', $name))); $size2 = getimagesize($temp); $width = $size2[0]; $height = $size2[1]; $upload = md5(rand(0, 1000) . rand(0, 1000) . rand(0, 1000) . rand(0, 1000)); // Restrictions for uploading $maxwidth = 6000; $maxheight = 6000; $allowed = array('image/jpeg', 'image/jpg', 'image/png', 'image/gif'); // Recognizing the extension switch($type){ // Image/Jpeg case 'image/jpeg': $ext= '.jpeg'; break; // Image/Jpg case 'image/jpg': $ext= '.jpg'; break; // Image/png case 'image/png': $ext= '.png'; break; // Image/gif case 'image/gif': $ext= '.gif'; break; } // upload variables $path = $userDir . $upload . $ext; $thumb_path = $userDir . 'thumb_' . $upload . $ext; // check if extension is allowed. if(in_array($type, $allowed)) { // Checking if the resolution is FULLHD or under this resolution. if($width <= $maxwidth && $height <= $maxheight) { if($size <= 5242880) { // check the shape of the image if ($width == $height) {$shape = 1;} if ($width > $height) {$shape = 2;} if ($width < $height) {$shape = 3;} //Adjusting the resize script on shape. switch($shape) { // Code to resize a square image. case 1: $newwidth = 300; $newheight = 225; break; // Code to resize a tall image case 2: $newwidth = 300; $ratio = $newwidth / $width; $newheight = round($height * $ratio); break; // Code to resize a wide image. case 3: $newheight = 225; $ratio = $newheight / $height; $newidth = round($width * $ratio); break; } // Resizing according to extension. switch($type) { // Image/Jpeg case 'image/jpeg'; $img = imagecreatefromjpeg($temp); $thumb = imagecreatetruecolor($newwidth, $newheight); imagecopyresized($thumb, $img, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); imagejpeg($thumb, $thumb_path); break; // Image/Jpg case 'image/jpg'; $img = imagecreatefromjpeg($temp); $thumb = imagecreatetruecolor($newwidth, $newheight); imagecopyresized($thumb, $img, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); imagejpeg($thumb, $thumb_path); break; // Image/png case 'image/png'; $img = imagecreatefrompng($temp); $thumb = imagecreatetruecolor($newwidth, $newheight); imagecopyresized($thumb, $img, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); imagepng($thumb, $thumb_path); break; // Image/gif case 'image/gif'; $img = imagecreatefromgif($temp); $thumb = imagecreatetruecolor($newwidth, $newheight); imagecopyresized($thumb, $img, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); imagegif($thumb, $thumb_path); break; } try { $stmt = $db->prepare("INSERT INTO images(path, thumb_path) VALUES(:path, :thumb_path)"); $stmt->bindParam('path', $path); $stmt->bindParam('thumb_path', $thumb_path); $stmt->execute(); if($stmt == false){ $error = 'There was a problem uploading your image.'; } else { $success = 'Your image has been uploaded.'; move_uploaded_file($temp, $path); } } catch(Exception $e) { die($e->getMessage()); } } else { $error = 'Your image size is too big.'; } } else { $error = 'Your image resolution exceeds the limit.'; } } else { $error = 'Your have uploaded a forbidden extension.'; } } } } } } This guy has found a way to find duplicate images. Here is his script. http://www.catpa.ws/php-duplicate-image-finder/ I could really use some help on integrating his method into mine.