Cannot get a inside msg.php
$('#click01').click(function(){
var a = 14;
$.ajax({
url : 'msg.php',
type : 'post',
data : {a:a}
}).done(function() {
window.location='msg.php';
})
});
msg.php
var_dump($_POST['a']); // NULL, but i need `14`
You are getting null because after the AJAX call is done you send the user to msg.php where $_POST is empty again.
When you do :
$('#click01').click(function () {
var a = 14;
$.ajax({
url: 'msg.php',
type: 'post',
data: {
a: a
}
}).done(function (data) {
alert(data);
})
});
You will see it works and you get 14.
I see no good reason to first use AJAX to POST something and then on success send the user to that same page.
You have a bad concet of ajax request.
$('#click01').click(function(){
var a = 14;
$.ajax({
url : 'msg.php',
type : 'post',
data : {a:a}
}).done(function(data) {
// data= var_dump($_POST['a'])
alert(data)
})
});
In var data you have the result of ajax request, but if you redirect to msg.php no have the variable
Are you sure that you are checking the ajax return, and not the return of the window.location='msg.php'; ?
Try this:
$('#click01').click(function(){
var a = 14;
$.ajax({
url : 'msg.php',
type : 'POST',
data : {'a':a},
success: function(r) { alert(r); }
});
});
// Instead of var_dump($_POST['a']) at msg.php use:- // extract($_POST); echo $a;
$('document').ready(function(){ var a = 14;
$.ajax({
url : "msg.php",
type : 'post',
data : {a:a}
}).done(function(data) {
alert(data);
});
});
var_dump-NULLis written on display