php create image on foreach loop

Hi,

i have the following code which works my uploading a photo to a directory. the script will then compare it against an thumbnail directory. if there is no thumbnail it creates one. it is all done by comparing the names. i cannot get it to work properly. the foreach loop works when there is no if statements within it. the if statements are done so it can support muliple formats.

how should i configure this to work

<?php
// Turn off all error reporting
error_reporting(0);
	
	
//SCAN THE FOLDER AND CREATE THUMBNAILS
	//BASED ON THE $DIRECTORY VALUE SET ON THE INDIVIDUAL PAGES
	//ALLOW ONLY CERTAIN IMAGE TYPES
	$files = glob("{$directory}*.{jpg,gif,png,jpeg}", GLOB_BRACE); //GIVES US THE ENTIRE LOCATION TO THE FILE 
	 
	//REMOVE THE ENDING OF THE IMAGE TO MAKE A DESRIPTION
	$file_types= array(".png",".jpeg",".jpg",".gif"); //match the allowable file types
	
	//RECONFIGURE THE NAME TO REMOVE THE FULL PATH AND THE EXTENSION OF THE FILES
	//REMOVE THE ENTIRE LENGTH OF THE FILE LOCATION AND GET JUST THE FILE NAMES
	$short_names = str_replace($directory,"",$files);
	 
//DETERMINE IF YOU WANT TO CREATE THUMBNAILS - SET ON INDIVIDUAL PAGES
	if($thumbs ===TRUE){
							
		//SET THE LOCATION OF THE THUMBNAILS BASED OFF OF THE DIRECTORY SET ON INDIVIDUAL PAGES
		$thumb_directory= $directory."thumbnail/";
		
		//CHECKS TO MAKE SURE THE THUMBDIRECTORY EXISTS IF NOT CREATE IT
		if(is_dir($thumb_directory)!==TRUE){
			mkdir($thumb_directory,0755);
		}
		
		//GET THE FILES FROM THUMBNAIL DIRECTORY
		$tb_files = glob("{$thumb_directory}*.{jpg,gif,png,jpeg}", GLOB_BRACE); //GIVES US THE ENTIRE LOCATION TO THE FILE 
		 
		//RECONFIGURE THE NAME TO REMOVE THE FULL PATH AND THE EXTENSION OF THE FILES
		//REMOVE THE ENTIRE LENGTH OF THE FILE LOCATION AND GET JUST THE FILE NAMES
		$tb_names = str_replace($thumb_directory,"",$tb_files);
		//REMOVE THE THUMBNAIL PREFIX
		$tb_prefix="tb_";
		$tb_short_names =str_replace($tb_prefix,"",$tb_names);

		//COMPARE THE THUMBS DIRECTORY TO CHECK IF IT HAS THE SAME INFORMATION--BASED ON THE SAME NAMES
		$images_difference= array_diff($short_names, $tb_short_names);
		 
		//IF THERE ARE DIFFERENCES IN THE ARRAYS MAKE A THUMB 
			foreach($images_difference as $differences){
				 
				//RENAME THE THUMB
				$rename_thumb = $tb_prefix.$differences;
				 
				//CREATE THE NEW IMAGE VARIABLE
				$new_image =$directory.$differences;
				 
				//CONFIGURE THE THUMBNAILS

				$new_height=$thumb_height;
				$new_width=$thumb_width;
				
				//GET ORIGNINAL IMAGE INFORMATION
				list($width, $height) = getimagesize($new_image);
						
				$thumb = imagecreatetruecolor($new_width, $new_height);
				
				//FIGURE OUT THE EXTENSION OF THE FILE
				$preg = pathinfo($differences, PATHINFO_EXTENSION);
				 
				//CREATE JPEG IMAGES
				if($preg == "jpg" || $preg == "jpeg"){

						$source = imagecreatefromjpeg($new_image);
						
						//RESIZE THE IMAGE
						imagecopyresized($thumb, $source, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
						imagejpeg($thumb, $thumb_directory.$rename_thumb, 100);
						
					echo "created:".$rename_thumb."PLEASE REFRESH"."<BR/>";
				}elseif($preg == "png"){
				   //CREATE PNG IMAGES

						  $source = imagecreatefrompng($new_image);
						  
						  //RESIZE THE IMAGE
						  imagecopyresized($thumb, $source, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
						  imagepng($thumb, $thumb_directory.$rename_thumb, 100);
						  echo "created:".$rename_thumb."PLEASE REFRESH"."<BR/>";
				}elseif($preg == "gif"){
					//CREATE GIF IMAGE

							$source = imagecreatefromgif($new_image);
							
							//RESIZE THE IMAGE
							imagecopyresized($thumb, $source, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
							imagegif($thumb, $thumb_directory.$rename_thumb, 100);
							echo "created:".$rename_thumb."PLEASE REFRESH"."<BR/>";
							
				}else{
					//THE FILE IS NOT AN SUPPORTED IMAGE	
						echo "The file is not supported:".$new_image."<br/>";
					  
				}
		  }
	}

?>

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