Pushing in MySQL data with javascript and php
Question
I'm working on a program but I'm new to js/jQuery/Ajax. I am trying to get user input from a form (html) and send it over to a php file that will insert the data into a MySQL database and then ultimately spit out the information into a div. I press submit but my user submitted data does not get inserted into the database. I initially had the submission redirect to my php file through the tag (action="post.php") which had worked in terms of inserting the data into the mysql database but had also redirected it to that post.php file upon submission.
my js file datawire.js:
$( 'button#submit').on('click', function() {
var uName = $('input#uName').val();
var uMessage = $('input#uMessage').val();
if ($.trim(uName) != '' && $.trim(uMessage) != '') {
$.post('post.php', {username: uName, message: uMessage}, function(data) {
$('div#viewer').text(data);
});
}
});
My php file post.php
<?php include("config.php");
$username = isset($_POST['username']);
$message = isset($_POST['message']);
if (($username && $message) && (empty($_POST['username'] === false) && empty($_POST['message']) === false)) {
$username = $_POST['username'];
$message = $_POST['message'];
// insert into database
$nowTime = getDateTime();
$userIp = getIp();
$sql = "INSERT INTO commentdb (id,username, message,date,ip) VALUES ('','$username','$message', '$nowTime', '$userIp') ";
$result = mysql_query($sql);
}
?>
and my HTML file:
<html>
<head>
<!-- latest jQuery direct from google -->
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<!-- for getting data -->
<script src="datawire.js"></script>
<!-- for posting data -->
<script type="text/javascript">
$(document).ready(function() {
$('#viewer').load("getdata.php");
});
</script>
</head>
<body>
<div id="viewer"> </div>
<br>
<!-- User form -->
<form method='post'>
<input type="text" id="uName" name="username" placeholder="Name" value="" maxlength="15" />
<br />
<input type="text" id="uMessage" name="message" placeholder="Message" value="" maxlength="100" />
<br />
<button id="submit" type="submit">Submit!</button> <button type="reset">Clear!</button>
</form>
</body>
</html>
2 answers
solution1
0 2013-12-13 07:57:51
Prevent your form submit with preventDefault() function
$( 'button#submit').click(function(e) {
e.preventDefault();
var uName = $('input#uName').val();
var uMessage = $('input#uMessage').val();
if ($.trim(uName) != '' && $.trim(uMessage) != '') {
$.post('post.php', {username: uName, message: uMessage}, function(data) {
$('div#viewer').text(data);
});
}
});
Return the text message from the server like this
<?php include("config.php");
$username = isset($_POST['username']);
$message = isset($_POST['message']);
if (($username && $message) && (empty($_POST['username'] === false) && empty($_POST['message']) === false)) {
$username = $_POST['username'];
$message = $_POST['message'];
// insert into database
$nowTime = getDateTime();
$userIp = getIp();
$sql = "INSERT INTO commentdb (id,username, message,date,ip) VALUES ('','$username','$message', '$nowTime', '$userIp') ";
$result = mysql_query($sql);
if($result)
{
echo " Data Inserted Successfully";
}else{
echo " Data insert failed - ".mysql_error();
}
}else{
echo " Required fields are missing";
}
?>
solution2
0 ACCPTED 2013-12-13 08:13:49
Try wrapping the contents of datawire.js with $(document).ready like you did in html file. This insures $ is actually defined before it's used.
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