Accessing JSON object via PHP - php

Question

I have the following code..
if (config.sendResultsURL !== null)
{
console.log("Send Results");
var collate =[];
for (r=0;r<userAnswers.length;r++)
{
collate.push('{"questionNumber'+parseInt(r+1)+ '"' + ': [{"UserAnswer":"'+userAnswers[r]+'", "actualAnswer":"'+answers[r]+'"}]}');
}
$.ajax({
type: 'POST',
url: config.sendResultsURL,
data: '[' + collate.join(",") + ']',
complete: function()
{
console.log("Results sent");
}
});
}
Using Firebug I get this from the console.
[{"questionNumber1": [{"UserAnswer":"3", "actualAnswer":"2"}]},{"questionNumber2": [{"UserAnswer":"3", "actualAnswer":"2"}]},{"questionNumber3": [{"UserAnswer":"3", "actualAnswer":"2"}]},{"questionNumber4": [{"UserAnswer":"3", "actualAnswer":"1"}]},{"questionNumber5": [{"UserAnswer":"3", "actualAnswer":"1"}]}]
From here the script sends data to emailData.php which reads...
$json = json_decode($_POST, TRUE);
$body = "$json";
$to = "myemail#email.com";
$email = 'Diesel John';
$subject = 'Results';
$headers = "From: $email\r\n";
$headers .= "Content-type: text/html\r\n";
// Send the email:
$sendMail = mail($to, $subject, $body, $headers);
Now I do get the email however it is blank.
My question is how do I pass the data to emailData.php and from there access it?

Answer 1

Create an object that you want to pass to PHP
Use JSON.stringify() to make a JSON string for that object.
Pass it to PHP script using POST or GET and with a name.
Depending on your request capture it from $_GET['name'] OR $_POST['name'].
Apply json_decode in php to get the JSON as native object.
In your case you can just pass userAnswers[r] and answers[r]. Array sequence are preserved.
In for loop use,
collate.push({"UserAnswer":userAnswers[r], "actualAnswer":answers[r]});
In ajax request use,
data: {"data" : JSON.stringify(collate)}
In the PHP end,
$json = json_decode($_POST['data'], TRUE); // the result will be an array.

Answer 2

json_decode converting string to object.
just do bellow code and check the values.
print_r($json)
Directly assign json object to string this is very bad.

Answer 3

If you decode your json, you will have a hash and not a string. If you want to be mailed the same as what you printed on the console, simply do this:
$body = $_POST['data'];
Another option would be to parse json into a php hash and var_dump that:
$json = json_decode($_POST['data'], TRUE);
$body = var_export($json, TRUE);

Answer 4

Using below JavaScript code
var collate =[], key, value;
for (r=0;r<userAnswers.length;r++) {
key = questionNumber + parseInt(r+1);
value = { "UserAnswer": userAnswers[r], "actualAnswer": answers[r] };
collate.push({ key : value });
}
$.post( config.sendResultsURL, { data: collate }, function(data) {
console.log("Results sent");
});
And do this in PHP
$data = json_decode( $_POST['data'], true );
and you will have all your data with array.

Answer 5

$jsonData = file_get_contents('php://input');
$json = json_decode($jsonData, 1);
mail('email', 'subject', print_r($json, 1));