The HTML_Crypt provides methods
to encrypt text, which can be later be decrypted using
JavaScript on the client side.
This is very useful to prevent spam robots
collecting email addresses from your site,
included is a method to add mailto links
to the text being generated.
Пример 43-1. A basic example to encrypt an email address
<?php
// encrypt 'yourname@emailaddress.com'
// with offset 8
$c = new HTML_Crypt('yourname@emailaddress.com', 8);
// add <a href="mailto:"></a> around this email
$c->addMailTo();
// output the javascript wich write the decrypted email.
$c->output();
?>
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The "encryption" function is basically works like ROT13,
with the difference that the $offset setting
replaces the 13.
It is also limited to ASCII characters between 32 and 127 (included).
Other characters will not be encrypted.
If you don't want to output the generated javascript directly to the browser
but use it otherwise or replace a template variable, use
getOutput() instead of output() -
the first returns the generated javascript, the latter echoes it out.
