<?php

if(empty($_GET['sid'])){
	//write html for image
	$mail='example@domain.com';
    $text=base64_encode(serialize($mail));
	echo '<img src="imgmail.php?sid='.$text.'" /><br/>';
}else{
	//show coded mail image
	$text=$_GET['sid'];
	header("Content-type: image/gif");	
	echo mail_to_image($text);
}

function mail_to_image($ctext='no mail'){
	$text=unserialize(base64_decode($ctext));
    $size=strlen($text)*8;
    $im = @imagecreate($size, 20) or die("Cannot Initialize new GD image stream");
    $background_color = imagecolorallocate($im, 255, 255, 255);
    $text_color = imagecolorallocate($im, 0, 0, 0);
    imagestring($im,3, 5, 5,  $text , $text_color);
    return imagegif($im);
}
?>