codice:
  $url = $_FILES['imagefile']['name'];   // Set $url To Equal The Filename For Later Use 
  		if ($_FILES['imagefile']['type'] == "image/jpg" || $_FILES['imagefile']['type'] == "image/jpeg" || $_FILES['imagefile']['type'] == "image/pjpeg") { 
    		$file_ext = strrchr($_FILES['imagefile']['name'], '.');   // Get The File Extention In The Format Of , For Instance, .jpg, .gif or .php 
    		$copy = copy($_FILES['imagefile']['tmp_name'], "$idir" . $_FILES['imagefile']['name']);   // Move Image From Temporary Location To Permanent Location 
    		if ($copy) {   // If The Script Was Able To Copy The Image To It's Permanent Location 
      			print 'Image uploaded successfully.
';   // Was Able To Successfully Upload Image 
      			$simg = imagecreatefromjpeg("$idir" . $url);   // Make A New Temporary Image To Create The Thumbanil From 
      			$currwidth = imagesx($simg);   // Current Image Width 
      			$currheight = imagesy($simg);   // Current Image Height 
      			if ($currheight > $currwidth) {   // If Height Is Greater Than Width 
         			$zoom = $twidth / $currheight;   // Length Ratio For Width 
         			$newheight = $theight;   // Height Is Equal To Max Height 
         			$newwidth = $currwidth * $zoom;   // Creates The New Width 
      			} else {    // Otherwise, Assume Width Is Greater Than Height (Will Produce Same Result If Width Is Equal To Height) 
        			$zoom = $twidth / $currwidth;   // Length Ratio For Height 
        			$newwidth = $twidth;   // Width Is Equal To Max Width 
        			$newheight = $currheight * $zoom;   // Creates The New Height 
      			} 
      		$dimg = imagecreate($newwidth, $newheight);   // Make New Image For Thumbnail 
      		imagetruecolortopalette($simg, false, 256);   // Create New Color Pallete 
      		$palsize = ImageColorsTotal($simg); 
      		for ($i = 0; $i < $palsize; $i++) {   // Counting Colors In The Image 
       		$colors = ImageColorsForIndex($simg, $i);   // Number Of Colors Used 
       		ImageColorAllocate($dimg, $colors['red'], $colors['green'], $colors['blue']);   // Tell The Server What Colors This Image Will Use 
      	} 
      		
		imagecopyresized($dimg, $simg, 0, 0, 0, 0, $newwidth, $newheight, $currwidth, $currheight);   // Copy Resized Image To The New Image (So We Can Save It) 
 		imagejpeg($dimg, "$tdir" . $url);   // Saving The Image
una volta fatto il resize.. come posso fare per inserire nel database..

e poi ?

grazie
d