Archief - Q: Spambots tegengaan

<a href="#lashknife|at|cuberjunkies|dot|org" onclick="mailto('lashknife|at|cyberjunkies|dot|org');return false">Lashknife</a>

function mailto(to) {
	location.href = "mailto://" + showMail(to);
}
function hideMail(to) {
	to = to.replace(/@/gi,"|at|");
	to = to.replace(/\./gi,"|dot|");
	return to;
}
function showMail(to) {
	to = to.replace(/\|at\|/gi,"@");
	to = to.replace(/\|dot\|/gi,".");
	return 	to;
}

<?php mailto('[email protected]','Lashknife'); ?>

function mailto($to,$title) {
	$target = hideMail($to);
	if ($title == '') { $title = $target; }
	echo '<a href="#' . $target . '" onclick="mailto(\'' . $target . '\')">' . $title . '</a>';
}
function hideMail($to) {
	$search = array('/@/','/\./');
	$replace = array('|at|','|dot|');
	return preg_replace($search,$replace,$to);
}
function showMail($to) {
	$search = array('|at|','|dot|');
	$replace = array('/@/','/\./');
	return preg_replace($search,$replace,$to);
}

/**
 * Encoded Mailto Link
 *
 * Create a spam-protected mailto link written in Javascript
 *
 * @access	public
 * @param	string	the email address
 * @param	string	the link title
 * @param	mixed 	any attributes
 * @return	string
 */
function safe_mailto($email, $title = '', $attributes = '')
{
	if ($title == "")
	{
		$title = $email;
	}
					
	for ($i = 0; $i < 16; $i++)
	{
		$x[] = substr('<a href="mailto:', $i, 1);
	}
	
	for ($i = 0; $i < strlen($email); $i++)
	{
		$x[] = "|".ord(substr($email, $i, 1));
	}

	$x[] = '"';

	if ($attributes != '')
	{
		if (is_array($attributes))
		{
			foreach ($attributes as $key => $val)
			{
				$x[] =  ' '.$key.'="';
				for ($i = 0; $i < strlen($val); $i++)
				{
					$x[] = "|".ord(substr($val, $i, 1));
				}
				$x[] = '"';
			}
		}
		else
		{	
			for ($i = 0; $i < strlen($attributes); $i++)
			{
				$x[] = substr($attributes, $i, 1);
			}
		}
	}	
	
	$x[] = '>';
	
	$temp = array();
	for ($i = 0; $i < strlen($title); $i++)
	{
		$ordinal = ord($title[$i]);
	
		if ($ordinal < 128)
		{
			$x[] = "|".$ordinal;
		}
		else
		{
			if (count($temp) == 0)
			{
				$count = ($ordinal < 224) ? 2 : 3;
			}
		
			$temp[] = $ordinal;
			if (count($temp) == $count)
			{
				$number = ($count == 3) ? (($temp['0'] % 16) * 4096) + (($temp['1'] % 64) * 64) + ($temp['2'] % 64) : (($temp['0'] % 32) * 64) + ($temp['1'] % 64);
				$x[] = "|".$number;
				$count = 1;
				$temp = array();
			}
		}
	}
	
	$x[] = '<'; $x[] = '/'; $x[] = 'a'; $x[] = '>';
	
	$x = array_reverse($x);
	ob_start();
	
?><script type="text/javascript">
//<![CDATA[
var l=new Array();
<?php
$i = 0;
foreach ($x as $val){ ?>l[<?php echo $i++; ?>]='<?php echo $val; ?>';<?php } ?>

for (var i = l.length-1; i >= 0; i=i-1){
if (l[i].substring(0, 1) == '|') document.write("&#"+unescape(l[i].substring(1))+";");
else document.write(unescape(l[i]));}
//]]>
</script><?php

	$buffer = ob_get_contents();
	ob_end_clean();
	return $buffer;
}