I'm using json_encode throughout my project without issue, except in one instance.
I make an ajax call from one page, as I do in others, and the resulting json appends a 1 to the end of the string for some odd reason.
My return string looks like this
{
"overtime": "yes"
}1
What could be causing this? I have literally commented everything out of the class that returns this string and I simply have the following code.
$reservation = ['overtime' => 'yes'];
return json_encode($reservation, JSON_PRETTY_PRINT);
My ajax request looks like this
$.ajax({
type: 'POST',
url: "{{ URL::action('Controllers\\PurchasesController#calculateReservation') }}",
data: { 'arrive' : arrive, 'depart' : depart},
dataType: 'json',
success: function(response) {
alert(response);
}
});
The alert doesn't fire and doesn't display anything as the json is invalid with the 1 appended to the end of the string.
You should echo the response from your controller, rather than returning it:
echo json_encode($reservation, JSON_PRETTY_PRINT);
In some scenarios (for example using WordPress), it is also necessary to call die() afterwards, as well.
Related
Please be patient. This is my first post as far as I remember.
This is a part of my calendar.js script. I'm trying to POST data that I fetch from modal window in index.php to sql.php.
function saveModal() { /*JQuery*/
var current_date_range = $(".modal-select#daterange").val();
var current_room_number = $("#mod-current-room-number").val();
var current_room_state = $("#mod-current-room-state").val();
var myData = {"post_date_range": current_date_range, "post_room_number": current_room_number, "post_room_state": current_room_state};
var myJSON = JSON.stringify(myData);
$.ajax({
type: "POST",
url: "sql.php",
contentType: "application/json; charset=utf-8",
dataType: "json",
async: true,
data: myJSON,
beforeSend: function() {
$("#ajax").html("<div class='loading'><img src='/images/loader.gif' alt='Loading...' /></div>");
},
success: function(result){
$("#ajax").empty();
$("#ajax").html(result);
$("#ajax").fadeIn("slow");
window.location.reload(true);
},
error: function(){
alert(myJSON);
$("#ajax").html("<p class='error'> <strong>Oops!</strong> Try that again in a few moments.</p>");
}
})
}
I get the data just fine (as you can see I have checked in the error: function() with alert(myJSON);). It looks like this: {"post_date_range":"12/19/2018 - 12/28/2018","post_room_number":"118","post_room_state":"3"}. Nevermind that the daterangepicker.js returns dates in the hideous MM/DD/YYYY format, which I would very much like to change to YYYY-MM-DD. The real problem is, the code never gets to success: function().
Now my sql.php is in the same folder as calendar.js and index.php.
In sql.php I try to retrieve those values with:
$currentDateRange = $_REQUEST['post_date_range'];
$currentRoomNumber = intval($_REQUEST['post_room_number']);
$currentRoomState = intval($_REQUEST['post_room_state']);
I have checked many other SO Q&As and none have helped me solve my problem. I don't see any spelling errors. It's not disobeying same origin policy rule. I don't want to use jQuery $.post function. Anyone sees the obvious solution?
You want to send array in post rather than the string so directly send myData to get array value in your PHP file rather converting to JSON string It would work with your current PHP file as you require.
You should specify a POST key for the JSON data string you are sending:
var myJSON = JSON.stringify(myData);
(...)
$.ajax({
(...)
data: 'data=' + myJSON,
You need to parse (decode) this string in your PHP file to be able to use it as an array/object again:
$data = json_decode($_REQUEST['data']);
$currentDateRange = $data['post_date_range'];
$currentRoomNumber = intval($data['post_room_number']);
$currentRoomState = intval($data['post_room_state']);
Also, dataType in jQuery.ajax function is specified as "The type of data that you're expecting back from the server." according to jQuery documentation. As far as I can tell from your code, you might rather expect something else as your response, so try excluding this line.
I am sorry to have burdened you all. It's my third week programming so my lack of knowledge is at fault.
I did not know how dataflow works between AJAX and PHP in the URL...
While I was searching for other errors, I printed or echoed out many different things. The PHP file should echo only 1 thing, although it can be an array with multiple values.
Like this for example:
$return_arr = array("sql"=>$sql1, "result"=>$result, "out"=>$out);
echo json_encode($return_arr);
I appologize again.
I was trying to make an ajax call and show an html part inside a div class. For that i used the following way.
$.ajax({
type: "get",
url: "{{url('searchByCheckbox')}}",
dataType: 'html',
success: function(html)
{
$(".infinite-scroll").html(html)
}
});
But the problem is there is a script inside that html part which i wanted to load when i make first ajax call it's not loaded but for the second one it's loaded the script.
suppose the html response like this :
<script>
alert()
</script>
// html
How do i make it work?
I put the script above the html page which i'm getting as response.
(those who are marking the Question as duplicate should read at least what i want and what they wanted )
Im sure that the error is happening because of the script, because you are closing the </script> tag inside the html.
The best solution is to return the data from your ajax call as a json
To do that you should:
1- add a dataType to your ajax parameter as the below:
$.ajax({
type: "get",
dataType: "json",
2- In the php file handling the ajax call, you must resurn the values as a json as below:
Assume that currently you are doing the following:
echo $html
You should change it to match the below:
$retArr = array(
"html" => $html, //Your html code without the javascript function
"jsFunc" => $jsFunc //Your java script function parameters
) ;
echo json_encode($retArr) ;
And then your ajax success must be as the below:
success: function(data)
{ //You can access all the object parametes by calling the object name `data` followed by a dot `.` and then by the parameter key
data.jsFunc // Your javascript function params
$(".infinite-scroll").html(data.html) ;
}
I have a php file with a lot of checkboxes on the left hand side. I extract the values via javscript and pass them into an array. Which works just fine. I would like to pass then this array via Ajax to PHP in order to mess around with the values and create SQL-statements out of them.
$(document).ready(function(e) {
$('#getSelectedValues').click(function() {
var chkBoxArray = [];
$('.graphselectors:checked').each(function() {
chkBoxArray.push($(this).val());
});
for (var i = 0; i < chkBoxArray.length; i++) {
console.log(i + " = " + chkBoxArray[i]);
}
$.ajax({
url: 'index.php', // (1)
type: 'POST',
dataType:'json',
data: chkBoxArray, //(2)
success: function(data){
console.log(data.length);
console.log(data);
}
});
});
});
Several questions:
(1) what file name do I need to add here? The origion or the target?
(2) I have numerous ways of this: serialization, with these brackets {}, and so on. How to get it done right?
An error that I get is the following:
Notice: Undefined index: data in graph.php
That makes me wondering a bit, because it clearly shows no data is being send.
var_dumps on $_POST and $_SERVER offer these results:
array(0) { }
array(0) { }
which is somewhat unsatisfying.
Where am I doing things wrong? The only puzzling aspect is the ajax, all other stuff is not much of an issue.
The site is supposed to work in the following way:
Page -> Checkbox(clicked) -> Button -> result (ajax) -> PHP fetches result -> SQL DB -> PHP gets DB result -> fetch result (ajax) -> jslibrary uses result for something.
1- You need to point your ajax to the script that will use the data you are sending. I would not recommend to point to index.php, since you'll need to add a if statement checking if there is data on $_POST that is exactly what your're expecting, otherwise it will return the same page that you're in (considering that you are in index.php and is making a request to index.php). A point to consider. Since it is a whole request and it's not a method call to actually return something to your page you need to echo things. That said, consider also to set header('Content-Type: application/json') then, since you're expecting dataType: 'json', echo json_encode($objectorarray);
2- Since you're sending a Javascript array to PHP, it can't interpret correctly the structure, that is why you should use JSON.stringify(chkBoxArray) before sending it. But just setting it on data attribute would send the number of checkboxes you selected as values to POST, so consider to data: {myCheckboxValues: JSON.stringify(chkBoxArray)}
In your PHP script, considering all the security measures to take, you can $foo = json_decode($_POST['myCheckboxValues']);
Well, of course you need to pass the target page as url in your ajax call. It can't guess which file should process the data.
As for the data property. You need to give your data a name.
data: {
something: "something"
}
Becomes: $_POST['something']. (value: something)
$.ajax({
url: 'target.php', // (1)
type: 'POST',
dataType:'json',
data: { data: chkBoxArray }, //(2) Now $_POST['data'] will work
success: function(data){
console.log(data.length);
console.log(data);
}
});
I know this question has been asked a lot as I have been googling since morning but I just can't think what's going on in my code.
I have a index.php (which is my website) that uses forms to receive information from user, then invokes a javascript file separately which in turn invokes another backend php file (this backend php file queries a database using mysql and does some stuff).
The problem is I am not sure what information is getting passed to the backend php from my js. I have just learnt jQuery and Ajax so I really don't know what is that small mistake I am making.
From my understanding, the backend php does its stuff and passes the value to javascript to be displayed on the web page. But my data is not getting sent / displayed. I am getting a error 500 internal server error.
Here are the pieces of code that are currently is question:
Javascript:
var data1 = {week:week, group:grp_name};
$.ajax({
dataType: "json",
type: "POST",
url : "php/remindUsers.php",
success : function(response){
alert ("success !");
},
error : function(response){
console.log(response);
alert("fail!");
}
})
});
PHP backend (remindUsers.php):
<?php
if (isset($_POST['week'])) {
$week = $_POST['week'];
}
if (isset($_POST['group'])) {
$group_name = $_POST['group'];
}
echo $week;
?>
I am ommiting out the sql code pieces because they work fine.
Edit: Now my status code is 200, response text is also ok . My response text shows a weird "enter' sign next to the actual response text expected. Is this normal ? And it is still going into the error block , not the success block of code.
I can not fully answer your question because I need more debug information about whats going on but theres 2-3 things about your code bugging me a little that might fix your bug.
First, use isset in your backend like this:
if (isset($_GET['your_input_name'])) {
$someData = $_GET['your_input_name'];
}
The isset part is very important here. Set it up and try it again. If you stop having a 500 error. Its probably because your data was never send to your backend or because your not checking the good input name.
Second, About input name. I can see in your code that you send:
var data1 = {week:week, group:grp_name};
So in your backend you should use the name of the value like this to retrieve your data:
$week = $_POST("week");
Third, I am not a json pro but maybe your json is not valid. Even if he is ok I suggest you build a "cleaner" one like this:
var data = [
{ 'name' : 'week', 'value' : week}
];
And finally, if you are using forms to send data to php then you can use something like that :
var myForm = $("#myForm").serializeArray();
$.ajax({
url: 'yourUrl',
type: "GET",
data: myForm,
dataType: 'json',
success: function(res){
//your success code
},
error: function(){
//your error code
}
});
I hope this helps.
You can't have these tags <body>,... in your PHP response over json.
It must be only:
<?php
$week = $_POST("data");
$json = json_decode($week);
echo json_encode($json);
?>
Remove the comment on
//data : {week :week}
And set a variable week with a valid value:
data : {week :week}
and so:
$.ajax({
dataType: "json",
type: "POST",
url : "php/remindUsers.php",
data : {week :week} ,
success : function(response){
console.log(response);
},
In order to see what is the shape of response.
You are doing a couple things wrong. First, you don't want to stringify your data before sending it to the server. You want to send JSON, so your commented line is the correct one. There is also a problem with the PHP. The data going to the server will look like:
{week: "Something"}
So in your PHP, you want to access the data like:
$_POST["week"];
USE THIS
PHP
$week = $_POST['data'];
$json = json_encode($week);
echo $json;
JS
$.ajax({
dataType: "json",
type: "POST",
url : "php/remindUsers.php"
//data : {week :week} ,
data: {data:{week:'week', group:'grp_name'}} ,
success : function(response){
alert ("success !");
},
error : function(response){
alert("fail!");
}
})
I would say wrap the php in a function and echo the json. Also its good to check if there was POSTed data, and if not return an error message. This is not tested, but will hopefully point you in the right direction.
<?php
function getJSON() {
if (isset($_POST["data"] && !empty($_POST['data']) ) {
$week = $_POST["data"];
$json = json_decode($week);
echo $json;
} else {
echo "There was a problem returning your data";
}
}
getJSON();
?>
Actually as I write this, I realized you could try these headers in your AJAX POST:
accepts: 'application/json',
contentType: 'application/json',
dataType: 'json'
Hope that helps.
It worked. I figured out the answer thanks to another SO post.
TIL : Even if server response is ok, the error condition will be triggered because the data returned to javascript from php is not json,since i had explicitly mentioned dataType: "json" in the ajax request.
Link here:
Ajax request returns 200 OK, but an error event is fired instead of success
Thanks folks for helping me and steering me in the right direction. Cheers!
I have a php returning some json in response to a POST request made via an ajax function.
In my php function I format the data like this:
//json return
$return["answers"] = json_encode($result);
echo json_encode($return);
This returns the following string:
answers: "[{"aa":"Purple","0":"Purple","ab":"Blue","1":"Blue","ac":"Red","2":"Red","ad":"Yellow","3":"Yellow"}]"
And this is where I am trying to catch it to use the data:
$.ajax({
type: "POST",
url: "http://ldsmatch.com/pieces/functions/question.functions.php",
dataType : 'JSON',
data: dataString,
success: function(data) {
alert(data.answers[0]["aa"]);
}
});
I've been trying to just alert the data so I can visualize it before setting up the vars I need, but am having some trouble formatting it correctly so it is usable.
If I alert data.answers[0] then it just shows me the first character in the string, which is a bracket [ and if i subsequently change the number it will go through each character in the returned string.
I have tried other variations, such as:
data.answers[0]["aa"] (this returns 'undefined' in the alert)
data.answers["aa"] (this returns 'undefined' in the alert)
data.answers[0] (this returns the first character of the string)
I feel like I'm close, but missing something. Any guidance appreciated.
edit:
thanks for all the suggestions. I removed the second json_encode and was able to parse with data.answers[0].aa
success: function(data) {
var json = $.parseJSON(data);
alert(json.answers[0]["aa"]);
}
Use parseJson like this
var json = $.parseJSON(data);
$(json).each(function(i,val){
$.each(val,function(k,v){
console.log(k+" : "+ v);
});
});
What if you remove double-encoding on PHP side? You've got an object with JSON string instead of object with first property being object itself, or you may explicitly decode "answers" property on client side as it was suggested above.