<?

function img_resize($sourcefile, $destfile, $forcedwidth, $forcedheight, $imgcomp=0) {
   if (!$sourcefile)
      return false;
   $g_imgcomp=100-$imgcomp;
   $g_srcfile=$sourcefile;
   $g_dstfile=$destfile;
   $g_fw=$forcedwidth;
   $g_fh=$forcedheight;
   $g_type="";
   if 	  (strpos($g_srcfile,".jpg")) $g_type="jpg";
   else if (strpos($g_srcfile,".jpeg")) $g_type="jpg";
   //else if (strpos($g_srcfile,".gif")) $g_type="gif";
   else if (strpos($g_srcfile,".png")) $g_type="png";
   else if (strpos($g_srcfile,".JPG")) $g_type="jpg";
   else if (strpos($g_srcfile,".JPEG")) $g_type="jpg";
   //else if (strpos($g_srcfile,".GIF")) $g_type="gif";
   else if (strpos($g_srcfile,".PNG")) $g_type="png";
   else 
      return "invalid file type(not jpg, or png)!".$sourcefile;

   if(file_exists($g_srcfile))    {
       $g_is=getimagesize($g_srcfile);
       if(($g_is[0]-$g_fw)>=($g_is[1]-$g_fh))    {
          $g_iw=$g_fw;
          $g_ih=($g_fw/$g_is[0])*$g_is[1];
       }
       else {
          $g_ih=$g_fh;
          $g_iw=($g_ih/$g_is[1])*$g_is[0];
       }

       if ($g_type=="jpg") $img_src=@imagecreatefromjpeg($g_srcfile);
       if ($g_type=="gif") $img_src=@imagecreatefromgif($g_srcfile);
       if ($g_type=="png") $img_src=@imagecreatefrompng($g_srcfile);
       if (!$img_src) {
          @imagedestroy($img_src);
          @imagedestroy($img_dst);
          return false;
       }

       if ($g_type=="gif") {
       	$img_dst=imagecreate($g_iw,$g_ih);
  		 	imagecopyresized($img_dst, $img_src, 0, 0, 0, 0, $g_iw, $g_ih, $g_is[0], $g_is[1]);
       }
       else {
       	$img_dst=imagecreatetruecolor($g_iw,$g_ih);
       	imagecopyresampled($img_dst, $img_src, 0, 0, 0, 0, $g_iw, $g_ih, $g_is[0], $g_is[1]);
       }
       if ($g_type=="jpg") imagejpeg($img_dst, $g_dstfile, $g_imgcomp);
       if ($g_type=="gif") imagegif($img_dst, $g_dstfile);
       if ($g_type=="png") imagepng($img_dst, $g_dstfile);
       @imagedestroy($img_src);
       @imagedestroy($img_dst);
       return true;
   }
   else {
      @imagedestroy($img_src);
      @imagedestroy($img_dst);
      return false;
   }
}

function img_crop($src, $dst, $x, $y, $w, $h){
   $g_type="";
   if 	  (strpos($src,".jpg")) $g_type="jpg";
   else if (strpos($src,".jpeg")) $g_type="jpg";
   else if (strpos($src,".gif")) $g_type="gif";
   else if (strpos($src,".png")) $g_type="png";
   else if (strpos($src,".JPG")) $g_type="jpg";
   else if (strpos($src,".JPEG")) $g_type="jpg";
   else if (strpos($src,".GIF")) $g_type="gif";
   else if (strpos($src,".PNG")) $g_type="png";
   else 
      return "invalid file type(not jpg, gif, or png)!".$src;

   if(file_exists($src))    { 
       $g_is=getimagesize($src);

		 //SOURCE RESOURCE (img_src)
	    if ($g_type=="jpg") $img_src=imagecreatefromjpeg($src);
       if ($g_type=="gif") $img_src=imagecreatefromgif($src);
       if ($g_type=="png") $img_src=imagecreatefrompng($src);
       
       //DESTINATION RESOURCE (img_dst)
       if ($g_type=="gif")
       	$img_dst=imagecreate($w,$h);
       else
       	$img_dst=imagecreatetruecolor($w,$h);

	   imagecopyresized($img_dst, $img_src, 0, 0, $x, $y, $w, $h, $w, $h);
       if ($g_type=="jpg") imagejpeg($img_dst, $dst, 100);
       if ($g_type=="gif") imagegif($img_dst, $dst);
       if ($g_type=="png") imagepng($img_dst, $dst);
       imagedestroy($img_dst);
       return true;
   }
   else
       return false;
}
?>