Develop Reference

How to send current URL in JavaScript to a second PHP page?

I want to sent current URL from Page1 to a php page called upload_picture.php.
I look at another question and this is an option:
On Page1
$.ajax({
type: 'POST',
url: '/uas_tools/visualization_generator/V2/Resources/PHP/upload_picture.php',
data: 'url=' + window.location.toString()
});
If using this option, on upload_picture.php, how to get the URL sent from Page1?

Your code to call the ajax will be as this.
$.ajax({
type: 'POST',
url: '/uas_tools/visualization_generator/V2/Resources/PHP/upload_picture.php',
data: { url: location.href },
success: function(response) {
// your success callback
},
error: function () {
// your error callback
}
});
And on the php page you can retrieve the data as
<?php
$page_url = $_POST['url'];

PHP Form submit get return value to html [duplicate]

I want to alert the return value from a php method, but nothing happens. Here is the ajax and php methods. Can anyone see what I am doing wrong?
--------------------------------------…
Ajax script
$.ajax({
type: 'get',
url: '/donation/junk/4',
data: datastring,
success: function(data) {
alert(data');
}
});
--------------------------------------…
php method
function junk($id)
{
return "works11";
}

in PHP, you can't simply return your value and have it show up in the ajax response. you need to print or echo your final values. (there are other ways too, but that's getting off topic).
also, you have a trailing apostrophe in your alert() call that will cause an error and should be removed.
Fixed:
$.ajax({
type: 'get',
url: '/donation/junk/4',
data: datastring,
success: function(data) {
alert(data);
}
});
PHP:
function junk($id)
{
print "works11";
}

You have an extra ' in there on the alert(data') line
This should work
$.ajax({
type: 'get',
url: '/donation/junk/4',
data: datastring,
success: function(data) {
alert(data);
}
});
And your PHP code should call the method also and echo the value
function junk($id) {
return 'works11';
}
exit(junk(4));
All you're doing currently is creating the method

ajax returns text, it does not communicate with php via methods. It requests a php page and the return of the ajax request is whatever the we babe would have showed if opened in a browser.

How to return data from PHP to a ajax function

Hi I am currently learning php and I am trying to get data from php file using the below script but i am not getting any response
$.ajax({
type: 'POST',
url: "mark_mod.php",
data: data_set,
dataType: "JSON",
success: function(data) {
alert("Response : " ); // not triggering
}
});
my php return stmt

There might be problems with File URL or file access. You can use complete callback to check request for errors like that:
$.ajax({
type: 'POST',
url: "mark_mod.php",
data: data_set,
dataType: "JSON",
success: function(data) {
alert("Response : " );
},
// This method will be fired when request completes
complete: function(xxhr, status) {
alert("Status code: " + status);
}
});
If the status code is not success that means there is something wrong with your request.
You can check more callback options here.
It doesn't matter whether you use return or echo in your PHP file.
The success method must get a call if it's fine. However, if you use
return instead of echo, nothing will append to your request's data.

On the other hand, The PHP response will include in your 'data' variable in the function success.
You need use data in the assync function success
success: function(data) {
alert("Response : " + data);
},

Thanks for your Responses. I got the Solution to my problem. It seems since Ajax is asynchronous... its taking time to receive the resultant echo value from my php file. so I had to synchronize my Jquery using async : False.

$(function(){
$('#formID').on('submit',function(){
const data_set={
name:"Nipu chakraborty",
"phone":"01783837xxx"
}
$.ajax({
type: 'POST',
url: "mark_mod.php",
data: data_set,
dataType: "JSON",
success: function(data) {
alert(data);
}
});
});
});

Calling a Success script if #Ajax call succeed

I have the following javascript which contains an ajax call:-
$.ajax({
type: "POST",
url: '#Url.Action("DeleteSelected"),
data: { ids: boxData.join(",") }
})
});
but is there a way to call a javaScript function is the above Ajax call succeed?
Thanks

function mySuccessFunction() {
alert('success');
}
$.ajax({
type: "POST",
url: '#Url.Action("DeleteSelected")',
data: {
ids: boxData.join(",")
},
success: function(data) {
// your code if AJAX call finished successfully
// call your function that already loaded from here:
mySuccessFunction();
// you can also process returned data here
}
});

You have three particular handlers you can use to process information returned with AJAX, .success(), .done(), and .fail(). With these methods, your code might look something like this:
$.ajax({
type: "POST",
url: '#Url.Action("DeleteSelected"),
data: { ids: boxData.join(",") }
}).success(function(data) {
// This callback is executed ONLY on successful AJAX call.
var returnedJSON = data; // The information returned by the server
yourSuccessFunction();
}).done(function() {
// This callback is ALWAYS executed once the AJAX is complete
yourDoneFunction();
}).fail(function() {
// This callback is executed ONLY on failed AJAX call.
});
Also see: jQuery AJAX Documentation

Jquery AJAX posting variable to server file

Using Jquery AJAX to read a number from a server file, increment the number, and write the number back to the server file.
I can read the file fine, I just can't post to the file.
<script>
var counter = -1;
$.ajax({
type: "GET",
url: "counter.txt",
success: function(text) {
counter = text;
counter++;
$("#count").html(counter);
},
error: function() {
$("#count").html("Error!");
}
});
$.ajax({
type: "POST",
url: "counter.txt",
data: counter,
success: function() {
},
});
</script>

Ajax being a client-side method can't write to a file on the server.
You would need some middleware in PHP, ASP, Python etc to take the amends as posted data and write to the file.

Since Ajax is asynchronous, this piece of code
$.ajax({
type: "POST",
url: "counter.txt",
data: counter,
success: function() {
},
});
will be executed before you will get first number from server. You need to put this code inside "success" function
$.ajax(
type: "GET",
url: "counter.txt",
success: function(text) {
counter = text;
counter++;
$("#count").html(counter);
$.ajax({
type: "POST",
url: "counter.txt",
data: counter,
success: function() {
},
});
},
error: function() {
$("#count").html("Error!");
}
});
Also, you should just call some server side php method through Ajax, since you can't set anything through JavaScript on server.
So "post" Ajax URL should looks like
url: 'http://www.server.ca/set_vars?var=var_title&value=' + encodeURIcomponent(counter)