I try to post single data to php page using javascript but can't get it right.. here's the code i tried:
try.js:
$(document).ready(function(){
var data = 1;
$.post( "data.php", { test_data: data});
});
data.php:
<?php
$test_data = $_POST[test_data];
echo $test_data
?>
when I access file data.php it says "Use of undefined constant test_data" and "Undefined index: test_data"..why is that?? can someone tell me what is wrong in the code please??
You're posting to the wrong file. Why post to try.php if your server-side file is data.php
test_data in $_POST[] should be a string, not a constant. use $_POST['test_data'].
You will still see an error because when you directly access data.php you don't post anything, so $_POST[] is actually empty.
POST data. chrome.google.com/webstore/detail/postman-rest-client/…This isn't valid PHP:
$test_data = $_POST[test_data];
As the error indicates, test_data isn't a known constant. You need to use a string literal:
$test_data = $_POST["test_data"];
try.php but the code is on data.php. You need to post the value to the page which has the code, or put the code on the page which receives the posted value. Or perhaps include one in the other. Either way, the PHP code in question needs to be executed when the value is posted.$_POST[test_data]; != $_POST['test_data']
When you do $_POST[test_data], you're checking if $_POST (an array) has the key test_data. But global variables ($_POST, $_GET, $_SERVER) never have a constant as selector. Check for a string.
$_POST['test_data'];instead of$_POST[test_data];. And, if you access try.php directly using your browser, the index is of course undefined as you didn't post any data to the script.