<?php
class Avatar{
	
	public $def_img = "http://www.gravatar.com/avatar/";
	
	function Get( $email, $size='' ) {
	
		$default = $this->def_img;
		
		if(empty($size))
		{
			$size = 40;
		}
			
		$url = "http://www.gravatar.com/avatar/" . md5( strtolower( trim( $email ) ) ) . "?d=" . urlencode( $default ) . "&s=" . $size;
		
		return $url;
	}
}