<?php

 

class ImageViewer {
// php_include/classes/ImageViewer.class.php	
	
var $db;
var $fontPath;	
var $basePath;
var $error;
var $font;
var $fontSize ;
var $debOutput ;
 

//only  alphanumeric with dashes,dots allowed
//just a nice security check
  function isValidImageName($str){
	return true;
$pattern ='-_0-9\.A-Za-z\/';
return preg_match("/^[$pattern]+$/", $str) ;
	
}


function __construct($img, $xOffset =150 , $yOffset  =3, $fontSize=10, $theFont='', $pathToFont=''){

$this->debOutput ='';
$this->db = 1 ;
$this->error = 0 ;
if( strcmp($theFont,'') ===0)
	$this->font= 'ArialN.TTF';
else
	$this->font= theFont ;

	
$this->basePath = $_SERVER['DOCUMENT_ROOT'] ;


if( $pathToFont == '')
	$this->fontPath = $this->basePath  .'/fonts/'.$this->font ;
else //user supplied as
	$this->fontPath  =  $pathToFont;

 

$this->fontSize = $fontSize;


//add initial slash if necessary
$img = (substr($img,0,1) === '/' )? $img :  '/'. $img ;
$fullImagePath = $this->basePath . $img;

if( (int) $this->db === 1){
	$this->debOutput .= '<h1>Debug Output is On</h1>';
	$this->debOutput .= 'path ' . $fullImagePath .' <br />';
	$this->debOutput .= 'font ' . $this->fontPath . '<br />';
}


 
 




if( 0 === (int)$this->isValidImageName($img))
	{
	die($img . ' is not a valid image name.');
	}	

if(0 === (int)is_file($fullImagePath))
	{
	die( $img . ' is not a valid file');
	}
else if( (int) $this->db === 1)
 $this->debOutput .=('<br / >'. $fullImagePath . ' is a valid file <br />');

if( 0 === (int)	getimagesize  ($fullImagePath) )
	{
	$this->debOutput .= '<br />' . $fullImagePath . '<br />';
	}

	

 if( (int) $this->db === 1 && (int) $this->error  === 1)
	{
	$this->debOutput .= '<br />Error : ' . $this->error  . '  <br />';
	}
	


$extension = substr($img, strrpos($img,'.')+1 );


if($extension =='jpg' || $extension =='jpeg'){
	header('Content-Type: image/jpeg');
	$image = imagecreatefromjpeg($fullImagePath);

	}
else if($extension =='gif'  )
	{
	header('Content-Type: image/gif');
	$image = imagecreatefromgif($fullImagePath);
	}

else if($extension =='png'){
	header('Content-Type: image/png');
	$image = imagecreatefrompng($fullImagePath);
	}


$color = imagecolorallocate($image, 0x00, 0x00, 0x00);
$fontRotation = '0';
$text = 'www.mathwarehouse.com  ';// . date('m/j/Y');


$x=imagesx($image)- $xOffset ;
$y=imagesy($image)- $yOffset ;

imagettftext($image,  $this->fontSize , $fontRotation, $x, $y, $color, $this->fontPath, $text);


//always output png which has clearer text anti-aliasing
imagepng($image);
imagedestroy($image);













//echo $this->debOutput;
}


}

?>