source: branches/rsr.v5.1.1/web/app/data/modules/data_images.php

<?php

  class data_images extends data
  {
    public $image_error = "";
    public $image_message = "";

    function get_image_error() { return $this->image_error; }
    function get_image_message() { return $this->image_message; }

    function img_size($file, $max_width, $max_height)
    { $img_infos = getimagesize($file);
      if($img_infos)
      { if($img_infos[0] > $max_width || $img_infos[1] > $max_height)
        { $r = $max_width / $img_infos[0];
          if($r * $img_infos[1] > $max_height) $r = $max_height / $img_infos[1];
          $img_size = array
          ( "width" => floor($r * $img_infos[0]),
            "height" => floor($r * $img_infos[1]) 
          );
        }
        else $img_size = array
        ( "width" => $img_infos[0],
          "height" => $img_infos[1] 
        );
        return $img_size;
      }
      return false;
    }

    function unique_file_name($dest, $file_name, $prefix = "img_")
    { $dest .= strlen($dest) > 0 && substr($dest, -1) != "/" ? "/" : "";
      if(is_dir($dest))
      { $ext = "";
        if(strpos($file_name, ".") !== false)
        { $v_ext_path = explode(".", $file_name);
          $ext = ".".$v_ext_path[count($v_ext_path) - 1];
        }
        $i = 0;
        while(file_exists($dest.$prefix.$i.$ext)) $i++;
        return $prefix.$i.$ext;
      }
      return false;
    }

    function upload_image($image, $dest, $img_file = null)
    { switch($_FILES[$image]["error"])
      { case UPLOAD_ERR_OK : break;
        default : $this->image_error = "Impossible d'uploader l'image.";
      }
      if(!$this->image_error)
      { $img_file = isset($img_file) ? $img_file : $_FILES[$image]["name"];
        $v_name = explode(".", $img_file);
        $ext = $v_name[count($v_name) - 1];
        if
        ( strcasecmp($ext, "png") == 0 ||
          strcasecmp($ext, "gif") == 0 ||
          strcasecmp($ext, "jpg") == 0 ||
          strcasecmp($ext, "jpeg") == 0
        )
        { if(file_exists($dest))
          { if(!is_dir($dest)) $this->image_error = "le dossier d'upload est un fichier. Impossible d'y uploader l'image";
          }
          else
          { @mkdir($dest);
            clearstatcache();
            if(!file_exists($dest) && !is_dir($dest)) $this->image_error = "Impossible de creer le dossier d'upload";
          }
          if(!$this->image_error)
          { if
            ( @move_uploaded_file
              ( $_FILES[$image]["tmp_name"],
                $dest."/".$img_file
              ) !== false
            ) return $img_file;
            else $this->image_error = "Impossible de copier l'image uploadee";
          }
        }
        else $this->image_message = "Le fichier image doit &ecirc;tre au format png, gif ou jpg";
      }
      return false;
    }

    function img_thumb($src, $max_width, $max_height, $thumbs_dir = "")
    { if(strlen($thumbs_dir) > 0)
      { if(!@is_dir($thumbs_dir)) @mkdir($thumbs_dir);
        if(!@is_dir($thumbs_dir)) return false;
      }
      $thumb = array();
      try
      { $sql =
         "SELECT *"
        ." FROM #--thumbs"
        ." WHERE src=".$this->eq($src)
        ." AND max_width=".$this->eq($max_width)
        ." AND max_height=".$this->eq($max_height);
        $rst = $this->sql->query($sql);
        if($v_rst = $this->sql->fetch_assoc($rst)) $thumb = $v_rst;
        $this->sql->free_result($rst);
      }
      catch(Exception $_e) { $thumb = false; }
      if($thumb !== false)
      { if($thumb) return $thumb;
        $thumbs_dir .= strlen($thumbs_dir) > 0 && substr($thumbs_dir, -1) != "/" ? "/" : "";
        $thumb_dir = $max_width."x".$max_height."/";
        if(!@is_dir($thumbs_dir.$thumb_dir)) @mkdir($thumbs_dir.$thumb_dir);
        if(!@is_dir($thumbs_dir.$thumb_dir)) return false;
        $thumb_file = $thumb_dir.$this->unique_file_name($thumbs_dir.$thumb_dir, $src, "img_");
        if($thumb_file === false) return false;
        if(($thumb = $this->make_thumb($src, $max_width, $max_height, $thumbs_dir, $thumb_file)) !== false)
        { try
          { $sql =
             "INSERT INTO #--thumbs"
            ."(src, src_width, src_height, max_width, max_height, thumb_file, thumb_width, thumb_height, creation_date) VALUES"
            ."( ".$this->eq($thumb["src"])
            .", ".$this->eq($thumb["src_width"])
            .", ".$this->eq($thumb["src_height"])
            .", ".$this->eq($max_width)
            .", ".$this->eq($max_height)
            .", ".$this->eq($thumb["thumb_file"])
            .", ".$this->eq($thumb["thumb_width"])
            .", ".$this->eq($thumb["thumb_height"])
            .", ".$this->eq($thumb["creation_date"])
            .")";
            $rst = $this->sql->query($sql);
            return $thumb;
          }
          catch(Exception $_e) {}
        }
      }
      return false;
    }

    function make_thumb($src, $max_width, $max_height, $thumbs_dir, $thumb_file, $quality = null)
    { $dest = $thumbs_dir.$thumb_file;
      $size = getimagesize($src);
      if($size[0])
      { if($size[0] > $size[1])
        { $width = $max_width;
          $height = ($size[1] * ($width / $size[0]));
        }
        else
        { $height = $max_height;
          $width = $size[0] * ($height / $size[1]);
        }
        $v_ext_path = explode(".", $src);
        $ext = $v_ext_path[count($v_ext_path) - 1];
        if(strcasecmp($ext, "jpg") == 0 || strcasecmp($ext, "jpeg") == 0)  $ext = "jpg";
        elseif(strcasecmp($ext, "gif") == 0)  $ext = "gif";
        elseif(strcasecmp($ext, "png") == 0)  $ext = "png";
        else $ext = "";
        $create_function = "";
        $thumb_function = "";
        if(strcasecmp($ext, "jpg") == 0)
        { $create_function = "imagecreatefromjpeg";
          $thumb_function = "imagejpeg";
        }
        elseif(strcasecmp($ext, "gif") == 0)
        { $create_function = "imagecreatefromgif";
          $thumb_function = "imagegif";
          $quality = NULL;
        }
        elseif(strcasecmp($ext, "png") == 0)
        { $create_function = "imagecreatefrompng";
          $thumb_function = "imagepng";
        }
        if($create_function)
        { $src_img = $create_function($src);
          $thumb_img = imagecreatetruecolor($width, $height);
          imagecopyresampled($thumb_img, $src_img, 0, 0, 0, 0, $width, $height, $size[0], $size[1]);
          if(isset($quality)) $thumb_img = $thumb_function($thumb_img, $dest, $quality);
          else $thumb_img = $thumb_function($thumb_img, $dest);
          if($thumb_img !== false)
          { return array
            ( "src" => $src,
              "src_width" => $size[0],
              "src_height" => $size[1],
              "max_width" => $max_width,
              "max_height" => $max_height,
              "thumb_file" => $thumb_file,
              "thumb_width" => $width,
              "thumb_height" => $height,
              "creation_date" => date("Y-m-d H:i:s")
            );
          }
        }
      }
      return false;
    }

  }

?>