is it possible

[Talguy]

is it possible to find out the dimensions of an image with php before it is saved to the server, for example the images are passed into the upload script from a form and I want to find the dimensions of them before I call a copy or move_uploaded_file function.

The prupose for me wanting to do is because I want to resize the image that is being uploaded if it is bigger the maximum that I have set. I have tried to do something like this but it seems not to work

$uploaded = $_FILES['photo_filename'];

$size = getimagesize($uploaded['tmp_name']);

if(size[0] > maxsize)
{
   do something.....
}

[halojoy]

maybe, i dont know
but ..
isnt it better to 'move_uploaded_file'
before you make this size check?

[Talguy]

I figured out how to do it with a little help from a script I found online. I'm going to post the code so that if another person runs into the problem they'll find the solution here.

$function_suffix = $gd_function_suffix[$filetype];

		// Instead of finding out which output function to use by testing the extension, 
		// just use the extension to create the function
		$function_to_read = "imagecreatefrom".$function_suffix;
        $function_to_write = "image".$function_suffix;

		/*                Add this check
		 * check to see if the image is great then 768 pixels wide and tall
		 * if the picture is wider or tall then the make lenght resize the picture and copy it to the server
		 * else copy it to the server
		 */
		$origimage = $function_to_read($photos_uploaded['tmp_name'][$counter]);

		// Create the main image	
		if($origimage)
		{
		  $origwidth = imagesx($origimage);
		  $origheight = imagesy($origimage);

		  if($origwidth > $maxSideLength) {
		    $width = $maxSideLength;
		    $height= (int)($maxSideLength * ($origheight / $origwidth));

			// Create an image template based on the file's extension
			if($function_suffix == $photo_types['image/gif']) {
			  $tmpimage = imagecreate($width, $height);
			}
			else {
			  $tmpimage = imagecreatetruecolor( $width, $height );
			}
		    imagecopyresized( $tmpimage, $origimage, 0, 0, 0, 0, $width, $height, $origwidth, $origheight );

			// Save the cropped image to the server
            $function_to_write( $tmpimage, $images_dir."/".$photo_category['category_name']."/".$filename );
            imagedestroy( $tmpimage );
		    echo "cropping\n";
		  }
		  elseif($origheight > $maxSideLength) {
		    $width = (int)($maxSideLength * ($origwidth / $origheight));
			$height = maxSideLength;

			// Create an image template based on the file's extension
			if($function_suffix == $photo_types['image/gif']) {
			  $tmpimage = imagecreate($width, $height);
			}
			else {
			  $tmpimage = imagecreatetruecolor( $width, $height );
			}
		    imagecopyresized( $tmpimage, $origimage, 0, 0, 0, 0, $width, $height, $origwidth, $origheight );

			// Save the cropped image to the server
            $function_to_write( $tmpimage, $thumbs_dir."/".$photo_category['category_name']."/".$filename );
            imagedestroy( $tmpimage );
		    echo "cropping\n";
		  }
		  else {
		    // Store the orignal file
		    echo "saving\n";
            move_uploaded_file($photos_uploaded['tmp_name'][$counter], $images_dir."/".$photo_category['category_name']."/".$filename);
		  }
		}