file_finder: Determines if a given image exists and shows it

===== BASIC DOCUMENTATION FOR FILE_FINDER CLASS =====

0.- INTRODUCTION AND EXTENTS

I implemented this class due to a necessity on a website where the users
could upload pictures and those pictures had to be shown and scaled to fit
into general site design...

It handles all operations required to determine wether a pic exists (checks for
different img types if not specified), scales accordingly to aspect ratio to fit
on a fixed space and echoes <img> tag

1.- BASICS OF OPERATION

The class works on 2 basic functions

PUBLIC INTERFACE:

  function file_find($imgdir="images") ;

    The constructor:

	$imgdir-> string with full path to your web img directory (from WEB ROOT DIR)
  i.e.:
      ROOTDIR = "../" (ROOTDIR IS DETERMINED AUTOMATICALLY BY THE CLASS ALWAYS 
                       RELATIVE TO CURRENT SCRIPT PATH!!)
      imgdir = "images" This will mean to get an image you can state "../images"
                        or "/images" Relative path used on file_find ops

  function get_file($fname,$alttext,$maxw=0,$maxh=0,$altimg)
  
    Finds the file and echoes <img>
    
    $fname -> the name of the img file (can have .ext or not... if not stated 
              cycles through .gif, .jpg, .png in that order)
    $alttext -> ALT text for the img tag
    $maxw -> Max Width for the pic
    $maxh -> Max Height for the pic
    $altimg -> Determines substitute for the pic (recursive get_file)
               useful for a default img i.e.
  
2.- Future releases and WIP

  I don't think i'll work much on this class, but any new release will be posted 
  at http://phpclasses.upperdesign.com

  Any suggestions are wellcome

3.- Contact information

  Carlos Falo Hervás
  slainte@jet.es