email spam harvesters

[zhangy]

Hi,

I want to protect email addresses from harvesters.

but the emails arent static. they are always new ones being entered into database and then displayed on webpage from there so its not like i can dump an email or two into a scrambler. I get dozens of new emails all the time and i want to protect them when they are selected and echoed to a webpage from database.

understand?

Does anyone know a way to protect these emails from spam harvesting bots?

Thanks!

[gevans]

I'm sure people will give you a few different options, personally I use this code;

 

<?php

/*################################
*Writes string as image
*$s=string;(text)$fs=font size;(pt)$fc=font color;(hex)$bc=background color(hex)
*Created: 6 October 2008
*Updated: 7 October 2008
*Copyright Purple Coffee Interactive
*Written by Gareth Evans
*/################################

class emailImageDisplay{
//var $font = 'fonts/monofont.ttf';
var $font = 'fonts/lsu.ttf';
function emailImageDisplay($s,$fs,$fc,$bc){
	$pixelfs = $fs;
	do{
		$fs--;
		$txtbox = imagettfbbox($fs, 0, $this->font, $s);
	} while(abs($txtbox[5]-2)>$pixelfs);
	$w = ($txtbox[2]+3);
	$h = abs($txtbox[5]-4);
	$img = @imagecreate($w,$h);
	$brgb = $this->hexToRGB($bc);
	$bgcolor = imagecolorallocate($img, $brgb[0], $brgb[1], $brgb[2]);
	$frgb = $this->hexToRGB($fc);
	$fontcolor = imagecolorallocate($img, $frgb[0], $frgb[1], $frgb[2]);
	$x = 1;
	$y = abs($txtbox[5]);
	imagettftext($img, $fs, 0, $x, $y, $fontcolor, $this->font , $s) or die();
	header('Content-Type: image/jpeg');
	imagegif($img);
	imagedestroy($img);
}
function hexToRGB($hexc){
	$c_array[] = hexdec(substr($hexc,0,2));
	$c_array[] = hexdec(substr($hexc,2,2));
	$c_array[] = hexdec(substr($hexc,4,2));
	return $c_array;
}
}

$s = (isset($_REQUEST['s']))? $_REQUEST['s'] : '';
$fs = (isset($_REQUEST['fs']) && is_numeric($_REQUEST['fs']))? $_REQUEST['fs'] : 12;
$fc = (isset($_REQUEST['fc']))? $_REQUEST['fc'] : '555555';
$bc = (isset($_REQUEST['bc']))? $_REQUEST['bc'] : 'ffffff';
$email_image = new emailImageDisplay($s,$fs,$fc,$bc);

?>

 

put that in a file /include/sec_img.php

 

<?php
<div style="float: left;">
<img style="padding-top: 3px;" src="include/sec_img.php?s=gareth@purplecoffee.co.uk&fs=12&fc=555555&bc=ffffff" alt="" />
</div>
<span style="font-family: 'Lucida Sans Unicode', 'Lucida Grande', sans-serif;color: #555555;font-size: 12px;">gareth@purplecoffee.co.uk</span>
?>

 

put that in a file called index.php (next to the include folder)

 

the rest should be self explanitory

[burnside]

not the best way but i used this once worked:

 

// selcet date etc ... 

$e_array = ('@');
$c_array = ('(at)');

		$row['emai'l] = str_replace($e_array, $c_array, $row['email']); 

 

A;; that will do is replace @ with (at) so email will look like myemail(at)myemail.com

 

there will be a ton of better ways to do it but i used that and didnt give me any problems.

 

 

 

 

 

 

 

 

[gevans]

Sorry, you also need fonts, make a folder called fonts inside include and add the fonts you want to use (.ttf) set in the emailImageDisplay class

[The Little Guy]

You could display them using JavaScript, for example:

 

<script>
onload=function(){
     // Scramble up the email a bit
     var e1 = 'il.c';
     var e2 = 'ema';
     var e3 = 'om';
     var e4 = 'il@';
     var e5 = 'ema';
     // Display the email
     document.getElementById('disE').innerHTML = e2+e4+e5+e1+e3;
}
</script>

<span id="disE"></span>