Log File Ajax to PHP - php

Question

Newbie here. I would like to ask for a help in creating a basic log file on what values inserted on the field.
Here's my html:
<form id = "form1" name = "form1" method="post">
<div id="fstep_1">
<p>
Your email address:
</p>
<input type="text" name="email" id="email" class="required email">
<label for="email" class="error" style="display: none;">This field is required</label>
</div>
<button type="submit" class="fsubmit">Submit</button>
here's my jquery:
<script>
$(".fsubmit").click(function() {
var emailval = $("#email").val().trim();
$.ajax({
url: '/logfiletracker.php',
type: 'POST',
data: {'data' : {email: emailval,
success: function(data) {},
});
});
</script>
Here's my ajax:
<script>
$(".fsubmit").click(function() {
var emailval = $("#email").val().trim();
$.ajax({
url: '/logfiletracker.php',
type: 'POST',
data: {'data' : {email: emailval,
success: function(data) {},
});
});
</script>
Here's my PHP
<?php
$data = $_POST['data'];
$date = new DateTime();
$datelog = $date->format('d.m.Y h:i:s');
$message = '[' . $datelog . '] - email: ' .$data;
echo($message);
?>
My problem is that it doesn't view any data at all except the date which is looks like this one
[02.02.2017 12:54:11] - email:
And when I tried to add another test, it doesn't increment the data. Is there something lack in my code?
Your answers are appreciated.

Answer 1

for testing purposes, to know where the problem is (js or php), you can do:
On JavaScript:
$(".fsubmit").click(function() {
var emailval = $("#email").val().trim();
var data = {
'data' : {
email: emailval
}
};
// testing!
console.log(data);
$.ajax({
url: '/logfiletracker.php',
type: 'POST',
data: data,
success: function(data) {}
});
});
On PHP:
<?php
$data = $_POST['data'];
// testing!
echo json_encode($_POST['data']);
exit;
$date = new DateTime();
$datelog = $date->format('d.m.Y h:i:s');
$message = '[' . $datelog . '] - email: ' .$data;
echo($message);
?>

Answer 2

$.ajax({
url: '/logfiletracker.php',
type: 'POST',
data: {'data' : emailval},
success: function(data) {},
});
Because your data is not being sent in a proper manner and is not received by php. Modify your Ajax code and it will work