After following several examples from this website I think I'm about to do it but still can't.
I have this code:
HTML
...
Pay
...
AJAX
function update_it(n_id){
$.ajax({
type: 'POST',
url: 'update_yes.php',
data: {idd: n_id},
success: function(output)
{
alert('Updated, server says '+n_id);
}, error: function()
{
alert('Wrong!');
}
});
}
PHP
<?php
$link = mysqli_connect("localhost", "root", "****", "****");
$sql = "DELETE FROM stuff WHERE id = " .$_POST["idd"];
mysqli_query($link,$sql) or die(mysql_error());
?>
And everything works but the PHP (I think). I say this because I can see how the HTML works properly and how the AJAX function return the success message, but still nothing happens in the database.
I tried different structures in the data field of the AJAX function like data: 'idd': n_id, or data: 'idd=' n_id, but nothing seems to work.
What am I doing wrong? Any tip or advice? Thank you in advance.
I am using apache MySQL and php on Winodws. And I has the same issue.
I have in my update-script which was called by AJAX
an UPDATE SQL statement
query it from DB MySQL
try to update the record without changes, (I mean simple updating a
row with the same data)
then... I got nothing to be updated because it is bug in AJAX query which call UPDATE statement in your server-side script. But it will work if you before any saving (updating) data make some changes to it.
I am using REPLACE statement instead of UPDATE.
I looked for this solution a lot of time, really too much. And I can't understand why it happens, because when I debug entire script with own params right on the server and all works fine, but when Ajax then only help REPLACE.
you should add exit; statement at the end of php code. echo some success statement. Then You should alert the output variable in javascript. So that you can make sure that php code is called.
Ok, finally I found a solution.
The code is pretty fine, it is an apache ownerships and rights problem.
This helped a lot.
Thank you guys for all you comments.
Related
I am trying to finish one page of my website the last couple of hours while achieving the following.
While clicking on a button, the following should happen
Download link appears (done - works)
The mySQL table should be opened and a counter should be incremented
As far as I got the points. Javascript cannot handle that and thus we can use AJAX or jQuery. I was already checking out different posts and websites such as:
how to execute php code within javascript
https://www.w3schools.com/js/js_ajax_database.asp
and much more. However, I guess I do have problems with the AJAX syntax and I actually don't know if the requested php files is loaded/opened or not. Especially the second link given above is almost similar to what I am searching for. However, it does not work. To check if the php file is called, I set an alert which works if I do call the file explicitly in the browser. Maybe this does not work with AJAX as I expect it. Here the code to get more familiar with the inconstency I am doing.
The page code:
<?php
echo '<div><button onclick="incrementAndDownload('testPath', 'fileName'); ">Click me</button></div>';
?>
<script>
function incrementAndDownload (link, fileName)
{
$.ajax({
url: 'openfoam/increment.php',
success: function(data) {
// Print something if necessary
}
});
//- Open the link
// window.open(arguments[0], "_blank");
//- Increment download inside mysql
//var xhttp;
//xhttp = new XMLHttpRequest();
//xhttp.open("GET", "openfoam/increment.php?foo=nana", true);
//xhttp.send();
}
</script>
The increment.php looks as follows:
<?php
echo '<script type="text/javascript" language="Javascript">
alert("Test message if the script is called...");
</script>';
// Code for accessing the mysql database and manipulate the data
//$page_id = mysql_real_escape_string(html_entities($_POST['file']));
?>
Now when I click the button, the javascript is executed (e.g., if I uncomment the window.open) this works as expected. However, as already said, the second part is to open the database via php and increment a number (counter). For any reason, I am not able to figure out where the problem is located. I am even not sure if AJAX opens the increment.php file (the alert messages never appears so I guess it is never called). Any suggestion is appreciated and I hope that this question does not just contain a fundamental small error. Thank in advance, Tobi
It's not the way the AJAX works. If you call alert() on a destination page it won't show in your browser. Your case is very basic so I will keep my solution on a basic level.
In increment.php just echo something, it can be just OK string. So when you go to increment.php page you will see only OK, nothing more, nothing less.
Then go back to your javascript and check what is your response.
$.ajax({
url: 'openfoam/increment.php',
success: function(data) {
if (data == 'OK') {
console.log('It works, sir!');
}
}
});
If you don't see a message in a console after these modifications something doesn't work. However, I think your page is executed properly, but you just don't get feedback, because you don't handle the response (data param in your case).
Check it out and don't forget to give me a feedback!🤓
This is my first question on here, please bear with me:
My ajax request is:
<script>
$.ajax({
type:"POST",
url:"http://localhost/folder/something.php",
data: { BuildingName:'Jacaranda'},
success: function(data){alert("It worked")},
error: function(data){alert("It failed")},
});
</script>
In my something.php file I have:
$Building= $_POST['BuildingName']; //Error Occurs Here
I get an error on this line stating:
Notice: Undefined index: BuildingName.
When I do VAR_DUMP it returns the $_POST array as empty.
I have checked and rechecked. Looked at different answers here and cannot seem to find the problem. I hope it is not staring me in the face.
I appreciate any help, thank you.
SOLUTION: Instead of simply trying to pass data between pages solely which I do not think is possible(correct me if I'm wrong), there has to be an intermediary. I passed my data into MySQL and had my webpage "listen" to the DB and do something based on the most recent entry.
SOLUTION USING SESSIONS per the advice of Lukas1 (you're right this is more efficient.)
<?php
$_SESSION['Building']= 'something';
$Building= $_SESSION['Building'];
echo "<script> $('#Jacaranda').click(function(){
var id = $(this).attr('id');
$Building= id;
}) </script>";
?>
And my call on the next page is:
<?php echo $Building ?>
Works perfectly without using database as intermediary.
Just change your data attribute to
"BuildingName=Jacaranda"
and it should work all fine.
I have a php file (I will call ORIGINAL) which do some calculations (through db mysql). I want to read this php from javascript. For that operation I have used ajax function and my php uses echo $result to print the data I need.
Everything is perfect here.
What happends now, I am creating another php file which need to call the ORIGINAL php file. If I want to call it, I must change the echo to return which is normal. This causes that my javascript call doesnt work.
Do you have a solution which work for both situations?
Thanks in advance.
Do you mean something like this?
original_php_file.php:
<?php
require_once "other_php_file.php"; // include all of the other files contents
// all code contained within original_php_file
?>
You were being pretty broad with your request (not including file names or code), so this is all I can assume you need.
Tell me if it helps :-)
Just send one more parameter into your ajax request to tell that ORIGINAL php file what type of output it should return.
Into your ORIGINAL file check for that output so you can understand from where that request come and what output you should return.
$.ajax({
url: 'ORIGINAL.php',
data: 'data=test&output=1',
success: function(r){
// here you have your output
}
});
I'm using phonegap and I'm trying to send an array encoded as json from a controller to view.
In my controller (server side):
$users = Model_Users::find(1);
$a=$users->to_array();
return json_encode($a);
In my view (into smartphone application using phonegap):
$(document).ready(function() {
$.ajax({
url: 'my/url...',
method: 'POST',
data: {
},
success: function(data) {
alert(data);
}
});
});
This working fine, infact in the view I get this alert:
data = {"name":"Jhon","surname":"Larry","age":"25"}
This work because the result of the query is only one row.
Instead when I try to get more than one query result, example:
$users = Model_Users::find('all');
$a=array();
foreach ($users as $user){
array_push($a,$user->to_array());
}
return json_encode($a);
In this case an empty response comes up, in fact I get this alert:
data = []
What is the problem?
Thanks in advance
I will try to build an answer with some tips based on what we already know thanks to the comments.
First of all now we are sure that the JSON is valid (jsonlint.com for example).
So,now, we are completely sure that the problem resides on the PHP / server-side.
My solutions:
Pay attention to not echo/return something before the value you need;
Change return with echo;
Add an exit; statement after the echoed value to be sure that no other characters will be included in the server answer;
Not exactly needed, but you can even think to set the header('Content-Type: application/json');
Debug looking at the console and using console.log instead of alert() (there are a lot of threads explaining the difference
Hope this will help!
I have problems when saving html5 data from a page into mysql through an ajax request and trying to retrieve it back with ajax. HTML attributes that trigger some javascript such as
<onload> or <iframe> will be stored as <on<x>load> and <if<x>rame> in the database and thus screw up the page when loading it.
Here's a short description of what I am trying to accomplish: I want registered users to have the ability to highlight text on my site and get the highlighted text back after refreshing the page, relogging etc.
What I have done so far: I implemented a javascript highlight library on my server that allows users to highlight text. That works well.
By clicking a button, those data are then saved into mysql through jquery ajax post. See specific code here:
Javascript
$(document).ready(function() {
//saves highlighted data in var "highlighted"
$('#savehighlights').click(function() {
var highlighted = $('.tabcontent.content1').html();
//send data to server
$.ajax({
url: 'highlight.php',
type: 'POST',
data: {highlighted: highlighted},
dataType: 'html',
success: function(result) {
console.log(result);
}
});
});
Saving the data to mysql works generally, but it looks as if certain commands are disabled through the process (e.g. onload becomes on<x>load5). The data are stored in the database as longtext and utf8_bin. I also tried blob, but problem remains. I also tried different dataTypes with Ajax such as 'text' and 'script'. 'Text' causes the same problem and 'script doesn't work at all. I also tried the ajax .serialize function, but no luck either.
I really don't know what to do about it and I am not sure what is causing the problem, Ajax or mysql? I was searching the web for an answer, including many articles in stackoverflow (which normally always give me the answer), but this time I am stuck. Either I don't know enough about it to look for the right question, or I just don't have any luck this time. So, any help would be greatly appreciated.
I was requested to add some more information. Here it is:
I am actually doing this on my local server (localhost) with XAMP, so security issues should not be a problem, right? If it is of any help, I am doing this in a Tiki Wiki CMS. The php script that is called through ajax (highlight.php) is the following:
require_once ('tiki-setup.php');
include_once ('lib/highlights/highlightslib.php');
$highlighted = $_POST['highlighted'];
$highlightslib->save_highlights($user, $highlighted);
The highlightslib library is here:
if (strpos($_SERVER["SCRIPT_NAME"], basename(__FILE__)) !== false) {
header("location: index.php");
exit;
}
class HighlightsLib extends TikiLib
{
function save_highlights($user, $highlighted) {
$saveHighlights = $this->table('tiki_user_highlights');
$saveHighlights->insert
(array(
'user' =>$user,
'highlightId' =>'',
'data' =>$highlighted,
'created' =>$this->now,
)
);
return true;
}
};
$highlightslib = new HighlightsLib;