PHP has some encryption mechanisms in it - but by that time you've
sent the data to the server. The other respondents are correct
though - you should be using an SSL connection to encrypt the data
between the user and your server.
On a site that I do I use SSL to keep the data secure between
Short:
You cannot
why:
PHP is serverside JavaScript is clientside
solution:
encode the cc number in PHP or use SSL for encryption. Or let the javascript
version encode it anyway
although it's not "send" and let the PHP checkf or the value of send and cc
number (that is kind of
what you are
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