$.ajax seems to be broken for me:
$.ajax({url:'getGalleries.php', datatype:'jsonp',
success: function(data){
$('#galleries').html('');
$.each(data,function(key,value) {
$('#galleries').append(value);
});
},
complete: function() { loading.hide(); }
});
The php is just passing:
<?php echo json_encode(array("associative"=>"arrays","are"=>"cool")); ?>
It seems to be fine with another function that uses just regular arrays, but for some reason my jQuery is spitting out a data that is an array of every character in the JSON string when I pass it a json encoded associative array.
The PHP page is grabbing a json list of image galleries then finding the first image in each gallery. I'm making an associative array with the gallery name as the index to then pass back to my html page to show each of my galleries and a sample image.
You have two problems. One is that datatype's capitalization is incorrect; it should be dataType. Second, it isn't JSONP as far as I can see - it's JSON. So use 'json' as the dataType.
I am guessing that you need to capitalize dataType:
$.ajax({url:'getGalleries.php', dataType:'jsonp',
success: function(data){
$('#galleries').html('');
$.each(data,function(key,value) {
$('#galleries').append(value);
});
},
complete: function() { loading.hide(); }
});
Related
I'm working at an app which would make a POST ajax request to a PHP script on my server. The script would query the database and return a row of records, as an array. (One array for each row, containing elements such as id, title, etc). I then want to use json_encode() to encode this array, and pass it back to the javascript which will use it to display the records.
1) How can I return the JSON encoded string to the javascript?
2) How will the javascript loop through the rows and access their fields?
To get JSON with jQuery, just use jQuery.getJSON(). Alternatively, you can use any other AJAX tool and then just eval() the json to get a javascript object.
To loop through an array, I usually use jQuery.each():
var recordList = yourMethodToGetRecordListWithAjax();
jQuery.each(recordList, function()
{
alert(this.Name); // For example
});
1) in the php script:
$return["foo"] = "bar";
$return["blah"] = "bleg";
print json_encode($return);
2) in the javascript:
$.ajax({
type: "POST",
url: URL,
cache: false,
data: values,
dataType: 'json',
success: function(json) {
var foo = json.foo;
if (json.blah == "bleg") {
// do stuff
}
} // end success function
}); // end ajax call
You can return the JSON encoded string to the JS by echoing it with a Content-Type of application/json.
See above answer for the rest.
I have 3 different JSON objects I want to concatenate and send over to a PHP file with jQuery AJAX. I can retrieve the JSON object in the PHP file, but cannot figure out how to loop through the results.
Here's what I have so far:
//my 3 JSON objects:
var json_obj_1{
"test1_key":"test1_val",
"test2_key":"test2_val",
"test3_key":"test3_val"
}
var json_obj_2{
"test4_key":"test4_val"
}
var json_obj_3{
"json_arr":[
{
"test1":"test2",
"test3":"test4"
}
]
}
//concat these to send over to the PHP file:
var my_json_obj = json_obj_1.concat(json_obj_2);
//I found if I didn't stringify obj_3 they didn't concatenate for some reason
my_json_obj = my_json_obj.concat(JSON.stringify(json_obj_3));
//my_json_obj now looks like this:
{
"test1_key":"test1_val",
"test2_key":"test2_val",
"test3_key":"test3_val"
}
{
test4_key: test4_val
}
{
"json_obj_3":[
{"test1":"test2","test3":"test4"}
]
}
Based on this question: Sending JSON to PHP using ajax, I don't stringify the final JSON object.
Here's the AJAX call to the PHP file:
$.ajax({
url: 'my_php_file.php',
data: {my_json_data: my_json_obj},
type: 'POST',
async: false,
dataType: 'json',
cache:false,
success:function(data, textStatus, jqXHR){
console.log('AJAX SUCCESS');
},
complete : function(data, textStatus, jqXHR){
console.log('AJAX COMPLETE');
}
});
This is what it looks like when retrieved in my PHP file:
echo $_POST['my_json_data'];
//outputs:
{
"test1_key":"test1_val",
"test2_key":"test2_val",
"test3_key":"test3_val"
}
{
test4_key: test4_val
}
{
"json_obj_3":[
{"test1":"test2","test3":"test4"}
]
}
Here's where I run in to problems. I want to be able to loop through this in a foreach. From what I have read (php: loop through json array) I have to decode the JSON object. However when I do this and loop through the results I get: " PHP Warning: Invalid argument supplied for foreach() ".
Even if I stringify the JSON object before sending it over to the PHP file I get the same problem. I have been banging my head against a brick wall for hours with this. Any help will be massively appreciated.
Thanks in advance.
Solved:
I was going wrong when concatenating my JSON objects following this question: Merge two json/javascript arrays in to one array. Instead I just put them together like so:
my_json_obj = '['+json_obj_1+','+json_obj_2+', '+JSON.stringify(json_obj_3)+']';
I then use json_decode in my PHP file which works a treat. http://json.parser.online.fr/ was invaluable in debugging my dodgy JSON. A great tool for JSON beginners.
You should be stringifying the whole object, try the following:
var my_json_obj = json_obj_1;
$.each(json_obj_2, function(key,value){
my_json_obj[key]=value;
});
$.each(json_obj_3, function(key,value){
my_json_obj[key]=value;
});
Ajax request:
data: {my_json_data: JSON.stringify(my_json_obj)},
PHP:
print_r(json_decode($_POST['my_json_data']));
As you say you need to decode the JSON, but your JSON is not well formed so I think the decode function is failing which causes the foreach error. There needs to be a , between objects, there's missing quotes around test4_val and it needs to be inside a singular object/array
You can check your JSON is wellformed at:-
http://json.parser.online.fr/
I think you want it to look more like:-
[{
"test1_key":"test1_val",
"test2_key":"test2_val",
"test3_key":"test3_val"
},
{
"test4_key": "test4_val"
},
{
"json_obj_3":[
{"test1":"test2","test3":"test4"}
]
}]
I want to manipulate a PHParray in javascript. This is the code i'm using.
Array.php
<?php
$sentido[1]="ver";
$sentido[2]="tocar";
$sentido[3]="oir";
$sentido[4]="gustar";
$sentido[5]="oler";
?>
fx_funciones.js
/*Pre-sentences*/
var js_array=new Array();
$.ajax({
type: "POST",
url: "array.php",
success: function(response) {
js_array=response
}
});
This is what I want to do but it's not working.
I think , the answer for above question is already addressed in below link. please check them out.
Get data from php array - AJAX - jQuery
I hope it will help you
Try this:
<?php
$sentido[1]="ver";
$sentido[2]="tocar";
$sentido[3]="oir";
$sentido[4]="gustar";
$sentido[5]="oler";
echo json_encode($sentido);
And:
$.getJSON('array.php', function(sentido) {
console.log(sentido);
});
You'll need to return the array from your PHP code as JSON, using the json_encode function. Then, in your jQuery code, specify a json dataType so that it's implicitly converted and passed to the callback function as an array:
var js_array=new Array();
$.ajax({
type: "POST",
url: "array.php",
success: function(response) {
js_array=response
},
dataType: 'json'
});
Use the standard JSON notation. It serializes objects and arrays. Then print it, fetch it on the client and parse it.
On the server:
echo json_encode($sentido);
For more on PHP's json_encode: http://php.net/manual/de/function.json-encode.php
On the client, this is specially easy if you use the jQuery function for ajax that expect JSON-encoded objects, and parses them for you:
$.getJSON('address/to/your/php/file.php', function(sentidos) {
alert(sentidos[0]); // It will alert "ver"
alert(sentidos[1]); // It will alert "tocar"
});
It uses GET but this most probably what you need.
For more on jQuery's $.getJSON: http://api.jquery.com/jQuery.getJSON/
So i have this piece of javascript, it posts to foo.php with value val, gets back data, empties the container and call function graph which will fill the container with a new chart.
$.post("foo.php", {val: val}, function(data){
if(data.length >0) {
$('#container').html('');
graph(data);
}
});
in foo.php, how do I make it pass back an array instead of string? at the moment I just have an echo in foo.php that echos the data delimited by a comma, ie: 1,2,3,4,5. then in the graph function I have a split(',' data) that creates an array for later use.
I mean, all this works fine, I'm just wondering if I can avoid the split step and have foo.php return an array directly.
thanks!
That's what json_encode is for:
echo json_encode( $array );
Just remember to set JSON headers, so that jQuery will know to parse the returned data as JSON. If you don't, you'll have to specify that in your jQuery AJAX call as follows:
$.post("foo.php", {val: val}, function(data){
if (data.length > 0) {
$('#container').html('');
graph(data);
}
}, 'json'); // <-- Here you're specifying that it'll return JSON
json_encode your array in PHP and jquery can easily parse your JSON encoded data.
I am using jQuery, AJAX and PHP to update the contents of a drop down box on an event. My code currently triggers the event and uses AJAX to call a PHP function which goes to the database and gets the records associated with each member of the drop down.
I can currently return this 2-dimensional array (an array of records with an array of columns in each one) back to my jQuery function but I am at a loss as to how to convert the array into something which I can use.
jQuery code to call AJAX:
var element= $('select[name=elementName]');
var data = 'inData=' + element.val();
// Call AJAX to get the info we need to fill the drop downs by passing in the new ID
$.ajax(
{
type: "POST",
url: "ops.php",
data: "op=getInfo&" + data,
success:
function(outData)
{
// WHAT DO I DO HERE TO CONVERT 'outData' INTO A 2-DIMENSIONAL jQUERY ARRAY??
},
error:
function()
{
}
});
PHP code:
$sqlResults= mysql_query("SELECT data FROM table WHERE id='".$_POST['inData']."'");
$outData = array();
// Fill the data array with the results
while ($outData[]= mysql_fetch_array($sqlResults));
// echo the data to return it for use in the jQuery file
echo $outData;
The code posted is working fine - I just don't know how to read 'outData' in jQuery.
Thanks in advance for any help!!
Have you looked at json_encode?
echo json_encode($outData);
This will convert it into a json object that can be read by jQuery.
your looking for json
//php
echo json_encode($outData);
//javascript
$.ajax({
type: "POST",
url: "ops.php",
data: "op=getInfo&" + data,
dataType: "json",
success: function(outData) {
console.log(outData); //this will be an object just like
//your php associative array
},
error: function() {
}
});
JSON can do the trick, but why not look at it from another angle?
If you're pinging PHP to get updated info, just have PHP output the option values you want in your select box. Then use the HTML return of jQuery AJAX to .html() the result into your select element.
There's a couple of different ways to skin a cat, and I would submit that this much easier approach is going to gain you extra time to do more jQuery wizardry.
jQuery can not read the echo of a PHP array. Use json_encode before you output it:
echo json_encode($outData);
That's a format jQuery actually can parse as the response.