How to pass HTML via JSON from PHP to AJAX - properly - php

I'm still in AJAX stuff since morning so maybe thats the reason why some things does't work as they schould - let's forget about it. To sum up, my problem is coincident with passing HTML via JSON. An example of the PHP code:
$list = "<strong>This is test</strong>";
$response = array('success'=>true, 'src' => $list);
echo json_encode($response);
Basicly that's the main part of the code which is responsible for passing the HTML to AJAX. Now, let's have a look on part of AJAX code:
success: function(output)
{
alert(output);
json = $(output).find(".content").text();
var data = $.parseJSON(json);
if(data.success == true)
{
obj_a.parents(".row").append(data.src);
obj_a.attr("id", "rollBack");
obj_a.text("Roll back");
}
},
Some of you will ask what am I doing in this part:
json = $(output).find(".content").text();
The answer is: I retrieve the json string from the ".content" box, so when I alert variable "json: i get:
{"success":true,"src":"1. dsfasdfasdffbcvbcvb<\/span>Edytuj<\/span> <\/a>Usu \u0144<\/span><\/div>2. vbnvbnm454t<\/span>Edytuj<\/span><\/a>Usu\u0144<\/span><\/div>3. ndfhgndgfhndfhgndfhd<\/span>Edytuj<\/span><\/a>Usu\u0144<\/span><\/div><\/div>"}
The problem is that I do not get this HTML... I get only text witout any HTML tags, styles etc...
String which I get, rather than HTML:
"1. dsfasdfasdffbcvbcvbEdytujUsuń2. vbnvbnm454tEdytujUsuń3. ndfhgndgfhndfhgndfhdEdytujUsuń"
Please don't try to look for anything smart or gunius in the above string because u won't - it's only a test string.
Acording to the part of PHP code - in my case I get "This is test" rather than "This is test".
To sum up my question is, how to pass these HTML tags or whole HTML code via json from PHP to AJAX.

I think you're misunderstanding how jQuery.ajax() works. You just need to tell it that dataType: 'json' (meaning that you're expecting JSON output from the server), and it takes care of the rest. You don't need to use jQuery.parseJSON(). The success() method will be given a JavaScript object representing the server response.
success: function(output)
{
// output is a JS object here:
alert(output.success); // true
// ...
},
To get your HTML from that point, you would just access output.src.

You can specify dataType: 'json' in your ajax request and receive an object(i.e. json already parsed) in your success call. eg
$.ajax(url, {
dataType: 'json',
success: function(output)
{
if(output.success == true)
{
obj_a.parents(".row").append(output.src);
obj_a.attr("id", "rollBack");
obj_a.text("Roll back");
}
},
if you can't change dataType you would call $.parseJSON on output
function(output)
{
alert(output);
var data = $.parseJSON(output);
if(data.success == true)
{
obj_a.parents(".row").append(data.src);
obj_a.attr("id", "rollBack");
obj_a.text("Roll back");
}
},

Related

Passing via GET json to ajax jquery,

I'm getting from a php page a json after a json encode. I correctly see the json in page that i want to pass to ajax. The data i send are taken via get from a form in php, saved in an array and then passsed with json encode.
But i get the error object from ajax:
What i'm missing? Should i copy and paste part of my backend too?
$.ajax({
method: "GET",
url: "queries/queries.php",
dataType: "json",
succes: function(data){
console.log(data);
console.log('json found');
},
error: function(error){
console.log(error);
console.log('json not found');
}
});
backend:
$calls= "text";
for ($i=0;$i<count($array);$i++) {
$schemaTab = $array[$i] . $calls;
$query = "SELECT * from 'schema'.'table'"; // this is just a sample query
$res=$db->getQuery($query); // this is a function that output the db query
header('Content-Type: application/json');
echo json_encode($res); // the json i pass
}
json:
[{"Schema":"schemaName1","DATEHOUR":"10\/05\/2021 11:56","count":"4"}]
[{"Schema":"schemaName2","DATEHOUR":"10\/05\/2021 10:21","count":"3"}]
[{"Schema":"schemaName3","DATEHOUR":null,"count":"0"}]
[{"Schema":"schemaName4","DATEHOUR":null,"count":"0"}]
Your JSON is invalid. JSON must consist of one thing such an a string, object, or array. (Objects and arrays can nest as many other things as they like inside them).
You have an array ([{"Schema":"schemaName1","DATEHOUR":"10\/05\/2021 11:56","count":"4"}]) which would be valid JSON but then you have another array and so on.
Gather up all your data into a variable in your PHP.
Then have header('Content-Type: application/json'); echo json_encode($that_variable) once, outside the loop.

how to output correct html with json using ajax

Hi I would like to output the code in [json['information'] as actual converted html code.
At the moment it seems to be just outputting the entire string as pure text (unformatted html, so you can see all the tags etc)
Im still learning about json so am unsure what is supposed to be done with the content recieved to make it proper html.
Thanks in advance
$('.engineering-services').live('click', function() {
$.ajax({
url: 'index.php?route=information/information/homepage_info',
type: 'post',
data: {info_for : 'engineering'},
dataType: 'json',
success: function(json){
$('#engineering-content').html(json['information']);
},
error: function(json) {
alert('fail');
}
});
});
EDIT, heres the PHP ...
public function homepage_info() {
$this->load->model('catalog/information');
$json = array();
if (isset($this->request->post['info_for'])) {
if ($this->request->post['info_for'] == 'engineering') {
$information_info = $this->model_catalog_information->getInformation(10);
$json['information'] = $information_info['description'];
}
$this->response->setOutput(json_encode($json));
}
}
Your HTML strings seem to be encoding special characters as HTML entities, like < to <, etc. From the PHP you've shown, it's probably encoded in the database (maybe you're encoding before saving).
You should be able to fix it with html_entity_decode:
$json['information'] = html_entity_decode($information_info['description']);
// or, a few lines later:
// $this->response->setOutput(html_entity_decode(json_encode($json)));
Looks like you are using Open cart for you php controller. In order to send back a a response with the proper json headers the Open Cart way is as follows:
$this->load->library('json');
$this->response->setOutput(Json::encode($json));
Hope that helps.

jquery ajax call empty querystring

So, I am using jquery to make an ajax call to a php script on my server.
For some reason I cannot figure out, however, there is no querystring sent. Using var_dump() on the $_GET object shows that it is an empty string, and Chrome's network activity developer tool indicates no string is sent.
$.ajax({
"url":"../script/content.php",
"settings": {
"dataType":"html",
"type":"GET",
"data":{
"id":$(this).prop('id')
}
}
}).done( function(msg) {
//$('#debug').html(msg);
$('#dialog').html(msg);
$('#dialog').load(function() {
$('#close').click(function() {
$('#over').fadeOut(fadeTime);
});
if ($('#unique') > 0) {
$('#unique').load(function(){
$('#over').fadeIn(fadeTime);
});
}
else {
$('#over').fadeIn(fadeTime);
}
});
});
I had tried the ajax call without the quotes where they weren't necessary before hand, and the result was the same... I just put those in because I thought it might be the problem... though I think that in such notation the quotes don't make a difference unless one of the field values is supposed to be a string.
Is there anything clear in that code which might cause a querystring not to be sent? I guess there is a problem with my syntax... I just can't see it.
The #dialog load callback seems to never be called, either... but I guess that is another question.
Try this
$.ajax({
//The link we are accessing with params
url:'http://example.com/script/content.php'
+ '?id='
+ $(this).prop('id'),
// The type of request.
type: "get",
//The type of data that is getting returned.
dataType: "html",
error: function(){
//something here
},
success: function( strData ){
//something here
}
});

How to send a json string back to jquery

I need to send some data to an external php page and that page has to send the required data back to jQuery. My question is how can I send the data from the external page back to jQuery on the page that send it.
This is the jQuery code that sends the data to the external page:
function LoadImageData(url)
{
$.ajax({
url: 'get_image_data.php',
dataType: 'json',
data: {'url': url },
success: SetTag()
});
}
This is the PHP code htat receives the data and is required to send some data back:
<?php
require_once('FaceRestClient.php');
$apiKey = '**********************';
$apiSecret = '**********************';
$api = new FaceRestClient($apiKey, $apiSecret);
$active_url = $_POST['url'];
$photos = $api->faces_detect($active_url);
return $photos;
?>
So my problem is, how can I send the data backto jQuery. Just a simple return does not seem to work.
Thanks in Advance,
Mark
You need to echo the resulting JSON:
echo $photos;
If $photos is not already JSON, use json_encode:
echo json_encode( $photos);
One would think the REST API would give you JSON, but you need to check if it's valid JSON (JSONP is not valid here) ?
You could just drop the dataType in your Ajax function and let jQuery figure it out, that way atleast you'll get something back if it's not valid JSON.
Try this:
$.ajax({
url: 'get_image_data.php',
type: 'POST',
data: {'url': url }
}).done(function(data) {
console.log(data);
}).fail(function() {
console.log('Your ajax just failed');
});
Open the console, and see what is printed
At the end of a PHP function I tend to do :
exit(json_encode($someData));
To return the data as JSON, but anything that prints the data is ok.
try this
echo json_encode( $photos);
you need to echo
echo $photos;
and as metntoned by #nickb if $photo is not already a json then convert it into json first and then echo.
echo json_encode($photos)
in jQuery if you want to fetch the data
onSuccess: function(data, status) {
//var data contains the returned json.
}

How can I "read" a response from the php file I call here using ajax?

I am very new to ajax and jquery, but I came across a code on the web which I am manipulating to suit my needs.
The only problem is that I want to be able to respond to the ajax from PHP.
This ajax POSTS to a php page (email.php).
How can I make the email.php reply back if the message is sent or if message-limit is exceeded (I limit the nr of messages sent per each user)?
In other words, I want ajax to take a 1 or 0 from the php code, and for example:
if(response==1){ alert("message sent"); } else { alert("Limit exceeded"); }
Here is the last part of the code: (If you need the full code just let me know)
var data_string = $('form#ajax_form').serialize();
$.ajax({
type: "POST",
url: "email.php",
data: data_string,
success: function() {
$('form#ajax_form').slideUp('slow').before('');
$('#success').html('<h3>Success</h3>Your email is has been sent.');
}//end success function
}) //end ajax call
return false;
})
Thanks
The success function of an $.ajax call receives a parameter, usually called data though that's up to you, containing the response, so:
success: function(data) {
// Use the data
}
(It also receives a couple of other parameters if you want them; more in the docs.)
The data parameter's type will vary depending on the content type of the response your PHP page sends. If it sends HTML, data will be a string containing the HTML markup; if your page sends JSON, the data parameter will be the decoded JSON object; if it's XML, data will be an XML document instance.
You can use 1 or 0 if you like (if you do, I'd probably set the content type to "text/plain"), so:
success: function(data) {
if (data === "1") {
// success
}
else if (data === "0") {
// failure
}
else {
// App error, expected "0" or "1"
}
}
...but when I'm responding to Ajax requests, nine times out of ten I send JSON back (so I set the Content-Type header to application/json), because then if I'm using a library like jQuery that understands JSON, I'll get back a nice orderly object that's easy to work with. I'm not a PHP guy, but I believe you'd set the content type via setContentType and use json_encode to encode the data to send back.
In your case, I'd probably reply with:
{"success": "true"}
or
{"success": "false", "errMessage": "You reached the limit."}
so that the server-side code can dictate what error message I show the user. Then your success function would look like this:
success: function(data) {
var msg;
if (typeof data !== "object") {
// Strange, we should have gotten back an object
msg = "Application error";
}
else if (!data.success) {
// `success` is false or missing, grab the error message
// or a fallback if it's missing
msg = data.errMessage || "Request failed, no error given";
}
if (msg) {
// Show the message -- you can use `alert` or whatever
}
}
You must pass an argument to your "success" function.
success: function(data)
{
if(data == '1')
{
$('form#ajax_form').slideUp('slow').before('');
$('#success').html('<h3>Success</h3>Your email is has been sent.');
}
}
And in your php file, you should just echo the response you need
if(mail())
{
echo '1';
}
else
{
echo '0';
}
Anything you echo or return in the php file will be sent back to you jquery post. You should check out this page http://api.jquery.com/jQuery.post/ and think about using JSON formatted variables to return so like if you had this in your email script:
echo '{ "reposonse": "1" }';
This pass a variable called response with a value of 1 back to you jquery script. You could then use an if statement how you described.
just have email.php echo a 0 or 1, and then grab the data in the success event of the ajax object as follows...
$.ajax({
url: 'email.php',
success: function(data) {
if (data=="1"){
...
}else{
...
}
}
});
what you do is, you let your ajax file (email.php) print a 1 if successful and a 0 if not (or whatever else you want)
Then, in your success function, you do something like this:
function(data) {
$('form#ajax_form').slideUp('slow').before('');
if(data==1){ alert("message sent"); } else { alert("Limit exceeded"); }
$('#success').html('<h3>Success</h3>Your email is has been sent.');
}
So you capture the response in the data var of the function. If you a bigger variety in your output, you can set you dataType to "json" and have your php file print a json_encoded string so that you can access your different variables in your response via for example data.success etc.
PHP can only return to AJAX calls, by its output. An AJAX call to a PHP page is essentially the same as a browser requesting for the page.
If your PHP file was something like,
<?php
echo "1";
?>
You would receive the "1" in your JavaScript success callback,
that is,
success: function(data) {
// here data is "1"
}
As an added note, usually AJAX responses are usually done in JSON format. Therefore, you should format your PHP replies in JSON notation.

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