Suppose you want a box on your website that says "Give us your email address and we'll send you news" or somesuch. What's a simple/elegant way to collect those email addresses (assuming a standard LAMP stack)? In particular, I'd like recommendations on
Javascript to handle the UI (complain if invalid email address, say thanks when they hit enter, etc).
CSS to make it look decent.
PHP to actually collect the email addresses and store them (either flat file or database is fine).
Or if there's a fancy Rails or AJAX way to do this, I'm very open to that, too.
(All I know currently is how to do this the old-school CGI way, with a plain html web form with a submit button and a server-side script that takes the form contents, pulls out the email address, and spits out html (potentially a redirect back to the original page).)
If I'm naive in thinking I can grab something off the shelf for this and should be starting with something like an AJAX tutorial, let me know that as well. I've seen this JQuery/AJAX tutorial recommended. Is that or something like it the quickest way to get a simple sign-up form up and running?
解决方案
I just implemented something like this on one of my websites strangely enough. I didn't store the email addresses though, I emailed them to myself. I'll comment that bit out so you can write your flat-file or database storage bits.
Here's my implementation, using jQuery. Steal away :)
In the HTML:
<script type="text/javascript">
$(document).ready(function(){
$('#btnSubmit').click(function(){
$('#btnSubmit').disabled = true;
var val = $('#emailAddress')[0].value;
$('#emailResponse').html('<img src="ajax-loader.gif" border="0" />').css('backgroundColor', 'ffffd0');
$.getJSON('notify.php',{email: val}, function(data){
if (!data.result) {
$('#emailResponse').html(data.message).css('backgroundColor','ff9999').effect('highlight', {color: '#ffff99'}, 1000);
} else {
$('#emailResponse').html(data.message).css('backgroundColor','99ff99').effect('highlight', {color: '#ffff99'}, 1000);
}
});
$('#btnSubmit').disabled = false;
return false;
});
$('#emailAddress').keyup(function(e) {
if(e.keyCode == 13) {
$('#btnSubmit').click();
}
return false;
});
});
</script>
</head>
<body>
<div style="margin:0 auto;background:#ffffd0;width:500px;padding:10px;text-align:center; font-family:Verdana,Arial,sans-serif; border:1px solid black;">
If you would like to be notified when we launch, please leave your email address here.<br /><br />
<input type="text" id="emailAddress" size="40" style="border:1px solid gray;padding:5px;"/>
<input type="button" id="btnSubmit" value="Submit" style="padding:5px;" />
<div style="padding:10px;margin:10px;" id="emailResponse"></div>
</div>
</body>
In the notify.php file:
<?php
$q = html_entity_decode($_GET["email"]);
$response = array();
if (!filter_var($q, FILTER_VALIDATE_EMAIL))
{
$response['result'] = 0;
$response['message'] = 'Invalid email given - try again';
}
else
{
// write to file or database
$response['result'] = 1;
$response['message'] = "Thanks, your details have been added, we'll notify you when we launch!";
}
}
echo json_encode($response);
?>
Edit: I know it's not pretty - inline styles, <br/> tags, etc.
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