Snippets Html
Html
Email Address Obfuscator PHP to Javascript
by: Lee Jones
|
September 13, 2004
Version: .9r
Type: Function
Category: HTML
License: GNU General Public License
Description: This little function creates a chunk of javascript based on Tim Williams' Email Obsfucator Version 2.1 It will do a pretty good job of hiding an e-mail address on a webpage on-the-fly.
<?php
/* This php function writes out Tim William's javascript for munging an email address
to make it hard for spammer harvestors to read it.
The original javascript is at http://www.u.arizona.edu/~trw/spam/
Feeling paranoid, I modified the version at phpbuilder.com to randomize the cipher
http://www.phpbuilder.com/snippet/detail.php?type=snippet&id=927
*/
function mungeemail ($address,$linkname) {
$cipherorig = "aZbcYXdeWVfUTghSiRQjklPmONnMoLpqKJrIHstGuFvEwDxCyBz1A234568790" ;
$cipher = str_shuffle($cipherorig);
$cipherlength = strlen($cipher) ;
$addresslength = strlen($address) ;
$shift = $addresslength ;
echo
"<script type=\"text/javascript\" language=\"javascript\">
<!--
// eMail Obfuscator Script 2.1 by Tim Williams - freeware
{
" ;
for ($j=0; $j<$addresslength; $j++) {
$nextchar = substr($address,$j,1) ;
if (strpos($cipher,$nextchar)===false) {
$coded .= substr($address,$j,1) ;
} else {
$chr = (strpos($cipher,$nextchar) + $shift) % $cipherlength ;
$coded .= substr($cipher,$chr,1) ;
}
}
echo
"coded = \"$coded\"
cipher = \"$cipher\"
shift=coded.length
link=\"\"
for (i=0; i<coded.length; i++){
if (cipher.indexOf(coded.charAt(i))==-1){
ltr=coded.charAt(i)
link+=(ltr)
}
else {
ltr = (cipher.indexOf(coded.charAt(i))-shift+cipher.length) % cipher.length
link+=(cipher.charAt(ltr))
}
}
document.write(\"<a href=\'mailto:\"+link+\"\'>$linkname</a>\")
}
//-->
</script>
<noscript>
<p>Sorry, but a Javascript-enabled browser is required to email me.</p>
</noscript>
" ;
}
?>
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