Save to database without a form using jQuery and PHP - php

Question

I'm trying to save some data to a database without the use of an html form and was wondering if anyone could help me as I'm no expert in PHP. So far I have got:
JQuery
$('.summary').on('click', '#btn_save', function () {
var summary_weight = $('#summary_weight').text();
var summary_bmi = $('#summary_bmi').text();
var summary_consumed = $('#summary_consumed').text();
var summary_burned = $('#summary_burned').text();
var summary_total = $('#summary_total').text();
var user_id = $('#user_id').text();
//All values stored correctly
$.ajax({
type: "POST",
url: "save.php",
data: //Data to send,
success: function () {
$('.success_message').html("success");
}
});
});
There is no issue at the first stage as all my values are stored in the variables correctly. I just don't know in what format to send them across to save.php.
save.php
<?php
require_once 'dbconfig.php';
//Connects to database
if($_POST)
{
//Not sure what to post here
$current_date = date('Y-m-d');
try{
$stmt = $db_con->prepare("INSERT INTO entry(user_id, date, weight, bmi, calories_consumed, calories_burned, calorific_deficit) VALUES(:user, :date, :weight, :bmi, :consumed, :burned, :deficit)");
$stmt->bindParam(":user", $user_id);
$stmt->bindParam(":date", $current_date);
$stmt->bindParam(":weight", $summary_weight);
$stmt->bindParam(":bmi", $summary_bmi);
$stmt->bindParam(":consumed", $summary_consumed);
$stmt->bindParam(":burned", $summary_burned);
$stmt->bindParam(":deficit", $summary_total);
if($stmt->execute())
{
echo "Successfully Added";
}
else{
echo "Query Problem";
}
}
catch(PDOException $e){
echo $e->getMessage();
}
}
?>
I'm not sure how to post this data to save.php and then how to process it to be sent to the database. I've also added a variable of current_date to send the current date to a field in the database.
Can anyone help me and fill in the blanks? Or maybe I'm going about this the wrong way?

Answer 1

Send your data in an object, like so:
// Declare data as an empty object
var data = {};
// Assemble the properties of the data object
data.summary_weight = $('#summary_weight').text();
data.summary_bmi = $('#summary_bmi').text();
data.summary_consumed = $('#summary_consumed').text();
data.summary_burned = $('#summary_burned').text();
data.summary_total = $('#summary_total').text();
data.user_id = $('#user_id').text();
$.ajax({
type: "POST",
url: "save.php",
// pass the data object in to the data property here
data: data,
success: function () {
$('.success_message').html("success");
}
});
Then, on the server side, you can access directly via $_POST superglobal:
$summary_weight = $_POST['summary_weight'];
$summary_bmi = $_POST['summary_bmi'];
// etc...

Answer 2

You can send all this data in the data parameter as given below:
$('.summary').on('click', '#btn_save', function () {
var summary_weight = $('#summary_weight').text();
var summary_bmi = $('#summary_bmi').text();
var summary_consumed = $('#summary_consumed').text();
var summary_burned = $('#summary_burned').text();
var summary_total = $('#summary_total').text();
var user_id = $('#user_id').text();
//All values stored correctly
$.ajax({
type: "POST",
url: "save.php",
data: {summary_weight: summary_weight, summary_bmi:summary_bmi, summary_consumed:summary_consumed, summary_burned: summary_burned, summary_total:summary_total, user_id:user_id },
success: function () {
$('.success_message').html("success");
}
});
});
And the, process it in save.php like this
$summary_weight = $_POST['summary_weight'];
and use it in the query to save it in database.