Image Resizer

[ryanfilard]

I already have a script that uploads the image but I would like to make a copy of the image resized down by 50% and uploaded to a new folder (imgups/thumbnails) I want it to do this all in one php script. I am not sure how to do this.

[floridaflatlander]

I use some code that's pretty good, I got it from the book PHP Solutions by david powers. The old one is real cheap on Amazon and there is also a pdf version for free online somewhere, you'll have to search. I can set the size to save, rename and I reduce the pixel count to 50 or what ever I want %. I use 50% and the images still look pretty good for online.

[Alkimuz]

i use the following for resizing to other size in pixels, you can change it a little to work for percentages (set in the main code the pixel size to, for example, 0.5 and define the new width and height in the function photoresize by multiplying the original width and height with this number)

 

this code will mentain the aspect ratio and use the with as main resize variable and adapt height to that, you can play with the beginning of the function photoresize to change that. 

 

notice the "copy()" in the uploadscript

 

in function.php:

<?php
function photoupload($filename, $source, $destination, $destination2)
{
/*START PHOTOUPLOAD*/
        
// Does the file have the right MIME type?

   if ($_FILES[$filename]['type'] != 'image/pjpeg' AND $_FILES[$filename]['type'] != 'image/jpeg' AND $_FILES[$filename]['type'] != 'image/gif' AND $_FILES[$filename]['type'] != 'image/png' AND $_FILES[$filename]['type'] != 'image/wbmp')
      {
      echo 'the file you want to upload is no photo, please go back to try again';
      exit;
      }

		  
      move_uploaded_file ($source, $destination );
		copy($destination, $destination2);

return 0;

/*END PHOTOUPLOAD*/
}

function photoresize($source, $maxx, $maxy)//foto wordt max breedte
{
/*START PHOTORESIZE*/

	// Get current dimensions

    list($width_orig, $height_orig) = getimagesize($source);


       // Check if they are over their limit

       if ( ($width_orig > $maxx) || ( $height_orig > $maxy))

          {

          if ($maxx && ($width_orig < $height_orig)) 
				  {
					$maxx = ($maxy / $height_orig) * $width_orig;
					} 
				else 
					{
					$maxy = ($maxx / $width_orig) * $height_orig;
					}
		   
		   // Resample voorbereiden
		   $image_p = imagecreatetruecolor($maxx, $maxy);
			 $image_type = strtolower( substr($source, strrpos( $source, '.' )) );

			 switch( $image_type )
			   {
				 case '.gif' :  $image = imagecreatefromgif($source);  break;
				 case '.jpg' :  $image = imagecreatefromjpeg($source); break;
				 case '.jpeg':  $image = imagecreatefromjpeg($source); break;
				 case '.png' :  $image = imagecreatefrompng($source);  break;
				 case '.bmp' :  $image = imagecreatefromwbmp($source); break;
				 }
		   // Resample de afbeelding

			 imagecopyresampled($image_p, $image, 0, 0, 0, 0, $maxx, $maxy, $width_orig, $height_orig);

				 // Output
			 switch( $image_type)
			   {
				 case '.gif'  :  imagegif($image_p, $source, 100);  break;
				 case '.jpg'  :  imagejpeg($image_p, $source, 100); break;
				 case '.jpeg' :  imagejpeg($image_p, $source, 100); break;
				 case '.png'  :  imagepng($image_p, $source, 100);  break;
				 case '.bmp'  :  image2wbmp($image_p, $source, 100);break;
				 }
			  
         

        } 
	                                            



return 0;	

    

/*END PHOTORESIZE*/
}

?>	

 

in your main code:

<?php
@$picture = time().'-'.$_FILES['picture']['name'];

@$filename = 'picture';

if ($_FILES['picture']['tmp_name'] == TRUE)
   {
//photo uploaden
$source = $_FILES['picture']['tmp_name'];
$path= 'pictures/';

$destination = $path.$picture ;
photoupload($filename, $source, $destination);

//photo resizen
$source = $destination;
$maxx= '500';
$maxy= '500';
photoresize2($source, $maxx, $maxy);
   }
?>

 

hope this helps!

[The Little Guy]

If you have imagemagick you could make your life a lot easier and just do this:

 

shell_exec("convert rose.jpg -resize 50% thumb/rose.png");

[jcbones]

If you don't have imageMajik, I would suggest simple Image.  One of the easiest free image classes out ATM.