Hi i im trying to get a value from a database and display it as a link in my navigation bar but i haven't been very successfull.
Start Off with my JQuery
<script>
$(document).ready(function(){
$.ajax({
type: 'GET',
data: {loadpage: 'table'},
url: 'addtable.php',
success: function(data){
$('.navbar ul').append('<li>'+THE-PHP-ARRAY I WANT TO SHOW+'</li>');
}
}); //ajax request
});
</script>
addtable.php
$query = "SELECT * FROM Menus WHERE menuCreator = '".$_SESSION['U_ID']."'";
$result = mysqli_query($con, $query);
$index=0;
while($row = $result->fetch_array()){
$index++;
$data = array(
$index=>$row['menuName']
);
echo json_encode($data);
}
I tried alot of stuff. If i change my dataType to json it doesnt work at all. I tried to put it in an $.each() loop still nothing works. If i go to addtable.php it displays
{"1":"Breakfast"}{"2":"Book Fair"}
which is the correct values in my database
Im sorry if it wasn't too clear im 15 and i only do this between school any help will be greatly appreciated
Thanks in advance
json_encode outputs a complete JSON text, but outputting it inside a loop you are outputting a bunch of JSON texts butting up against each other. The result isn't a valid, single JSON text.
Put $data into an array.
Encode that array as JSON after the loop has finished.
Then you'll need to loop over that array (data) when it gets converted to JavaScript.
{"1":"Breakfast"}{"2":"Book Fair"}
is not a valid JSON object. if you want to encode multiple objects, you need to do it like this:
[{"1":"Breakfast"}, {"2":"Book Fair"}]
or if you just need the values:
["Breakfast", "Book Fair"]
For loading it from the server you should use the shorthand function jquery.getJSON
Related
I'm building a search function to retrieve XML data for a google map.
In addition to that, I want to display how many results were actually found.
I thought about doing an echo inside the actual document, however that might mess with my marker data. How would I take a PHP variable and retrieve it in Jquery after a success call?
If my PHP looked like this:
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
$num_rows = mysql_num_rows($result);
And Jquery like this:
$.ajax({
type: "POST",
url: "MapSearchxml.php",
data: {
dataFromDate: FromDate,
//lalala
dataHasPatio: HasPatio
},
beforeSend: function (html) { // this happens before actual call
$("#results").html('Please Wait');
$("#searchresults").show();
$(".phpFromDate").html(FromDate);
},
success: function (data, status, jqXHR) {
//Success?
},
dataType: 'xml'
});
Might find it easier to create array in php and send JSON. At client is easy to loop over response object/array
$output=array('status'=>'', 'results'=>array());
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
$num_rows = mysql_num_rows($result);
if( $num_rows){
$output['status']='ok';
/* push row data to $output['results'][]; in while loop*/
}else{
$output['status']= 'No results';
}
echo json_encode( $output);
Then in jQuery:
success:function( data){
if (data.status != 'No results' ){
/* count array length*/
var count= data.results.length;
/* loop over data.results array*/
}
}
/* change dataType to "json"*/
I forgot about count and added it in jQuery...can also add a count property to the $output php array and use $num_rows to populate
Just trying out a JSON example for you, this has echo but you can do complex things with it?
Not sure if that is what your after? I get that you don't want to do echo on each variable, and you wont if using JSON.
<?php
$simple = 'simple string';
$complex = array('more', 'complex', 'object', array('foo', 'bar'));
?>
<script type="text/javascript">
var simple = '<?php echo $simple; ?>';
var complex = <?php echo json_encode($complex); ?>;
</script>
You see, what AJAX gets on success is an html code. If you AJAX a complete html page you will get it back, starting with <html> and ending with </html>. You can just make a special markap on your return html data, like [sepcial_info : 'INFO'] or somthing and then just to filter it.
Okay, I needed a bit to decipher your question, probably I'm still wrong, let's try:
What you try to do is not technically possible with what you have in mind. In short: If you do one Ajax request, you return one response. The moment the success function is called, your PHP script is already gone. So you can only pass one return value.
However what you can do is, that you make that return value a nested one, e.g. containing two parts:
The XML document you already returned
The count
That is probably your solution. If you ask how, I would add the count as a namespaced value to the XML and then process it with javascript.
As you have not shown any code here, I can not give a quick example (and I leave that as a pointer for your future questions) for your case. Add a namespace element, like an attribute is pretty simple with DOMDocument in PHP.
So I have got to a stage in my website where I need to pack a lot of information into a single json array like object, so in order to do this I need to pack a list of array information under a certain key name, then another set of data under another key name.
So for example:
$array = array();
foreach(action goes here)
{
$array['data1'] = array('information' => data, 'more_information' => more_data)
}
$array['data2'] = array("more data");
This basically illustrates what I am trying to do, I am able to partially do this, however naming the key for the new data set only replaces each data, instead of adding into it in the foreach loops.
Now if this part isn't too confusing, I need some help with this. Then in addition to this, once this is sorted out, I need to be able to use the data in my jQuery response, so I need to be able to access each set of data something like: json.data1[i++].data, which would ideally return "more_information".
You need an incremental number in that loop and make the results available as a json object...
$array = array();
$i = 0;
foreach(action goes here)
{
$array['data'.$i] = array('information' => data, 'more_information' => more_data)
$i++;
}
$array['data2'] = array("more data");
$data = json_encode($array);
Then in php you might set a js var like so:
<script type="text/javascript">
var data = <?php echo $data; ?>;
</script>
which could then be accessed in js easily:
alert(data.data1.information);
If I understand your question correctly you expect to get this object as a response to something? Like a jQuery .ajax call?
http://api.jquery.com/jQuery.ajax/
This link illustrates how to use it pretty clearly. You would want to make sure to specify dataType = "json" and then place your data handling in the success call:
$.ajax({
url: 'some url string',
type: "GET",
dataType: "json",
success: function(data)
{
$.each(data, function(i, v){
console.log(data[i]);
});
},
error: function()
{
//error handling
}
});
This is relatively untested, but the concept is what I am trying to convey. You basically make your multi-dimensional array in php and json_encode it. Either of these methods will allow you to parse the json.
I am currently working on a php/javascript project which retrieves information from a database and json encodes the data. It is supposed to show the values from the database inside a combo box on the web page.
In the PHP script that encodes the mysql data I have the following code:
$query = "SELECT pla_platformName as `platform` FROM platforms";
$result = mysql_query($query);
if ($result)
{
while ($myrow = mysql_fetch_array($result))
{
$output[] = $myrow;
}
print json_encode($output);
die();
}
In the javascript code I have the following:
<script>
$(document).ready(function()
{
getPlatforms();
function getPlatforms()
{
$.post("phpHandler/get-platforms.php", function(json)
{
alert(json);
alert(json.platform);
}
);
}
});
</script>
I have alert(json); which shows the entire json data which looks like the following:
[{"0":"hello","platform":"hello"},{"0":"android","platform":"world"}]
The next alert(json.platform) I am expecting it to show either hello or world or both but on this line it keeps on saying undefined. Why isn't this working and how do I get a specific platform, i.e. either hello, or world.
Thanks for any help you can provide.
You need to first convert your JSON string into an object
var data = $.parseJSON(json);
In this case, the object returned is an array. Try
alert(data[0].platform);
You can skip the first step if you set the dataType option to json in your ajax call.
$.post("phpHandler/get-platforms.php", function(data) {
alert(data[0].platform);
},
'json'
);
See jQuery.post() documentation
Your platform member is defined on each item, you'll have to specify which array item you want the platform for. This should do the trick:
alert(json[0].platform);
I'm assuming that your json parameter actually holds a javascript object, and not simply a string. If it is a string, you should define contentType 'application/json' on your php page. (I'm not sure how you do that in php since I do .NET for server side myself.)
To test it quickly however, you can do a $.parseJSON(json) to get the object.
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.
I'm trying to use jQuery.post() function to retrieve some data. But
i get no output.
I have a HTML that displays a table. Clicking this table should trigger a jQuery.post event.
My scriptfile looks like this:
jQuery(document).ready(function() {
jQuery('#storeListTable tr').click(function() {
var storeID = this.cells[0].innerHTML; //This gets me the rowID for the DB call.
jQuery.post("../functions.php", { storeID: "storeID" },
function(data){
alert(data.name); // To test if I get any output
}, "json");
});
});
My PHP file looks like this:
<?php
inlcude_once('dal.php');
//Get store data, and ouput it as JSON.
function getStoreInformation($storeID)
{
$storeID = "9";//$_GET["storeID"];
$sl = new storeLocator();
$result = $sl->getStoreData($storeID);
while ($row = mysql_fetch_assoc($result)) {
{
$arr[] = $row;
}
$storeData = json_encode($arr);
echo $storeData; //Output JSON data
}
?>
I have tested the PHP file, and it outputs the data in JSON format. My only problem now is to return this data to my javascript.
since the javascript is located in the /js/ folder, is it correct to call the php file by using '../'?
I don't think I'm passing the storeID parameter correctly. What is the right way?
How can I call the getStoreInformation($storeID) function and pass on the parameter? The jQuery example on jQuery.com has the following line: $.post("test.php", { func: "getNameAndTime" }
Is the getNameAndTime the name of the function in test.php ?
I have gotten one step further.
I have moved the code from inside the function(), to outside. So now the php code is run when the file is executed.
My js script now looks like this:
jQuery('#storeListTable tr').click(function() {
var storeID = this.cells[0].innerHTML;
jQuery.post("get_storeData.php", { sID: storeID },
function(data){
alert(data);
}, "text");
});
This results in an alert window which ouputs the store data as string in JSON format.
(because I have changed "json" to "text").
The JSON string looks like this:
[{"id":"9","name":"Brandstad Byporten","street1":"Jernbanetorget","street2":null,"zipcode":"0154","city":"Oslo","phone":"23362011","fax":"22178889","www":"http:\/\/www.brandstad.no","email":"bs.byporten#brandstad.no","opening_hours":"Man-Fre 10-21, L","active":"pending"}]
Now, what I really want, is to ouput the data from JSON.
So I would change "text" to "json" and "alert(data)" to "alert(data.name)".
So now my js script will look like this:
jQuery('#storeListTable tr').click(function() {
var storeID = this.cells[0].innerHTML;
jQuery.post("get_storeData.php", { sID: storeID },
function(data){
alert(data.name);
}, "json");
});
Unfortunately, the only output I get, is "Undefined".
And if I change "alert(data.name);" to "alert(data);", the output is "[object Object]".
So how do I output the name of teh store?
In the PHP file, I've tried setting $storeID = $_GET["sID"]; But I don't et the value. How can I get the value that is passed as paramter in jQuery.post ?
(currently I have hardcoded the storeID, for testing)
Lose the quotes around "storeID":
Wrong:
jQuery.post("../functions.php", { storeID: "storeID" }
Right:
jQuery.post("../functions.php", { storeID: storeID }
bartclaeys is correct. As it is right now, you are literally passing the string "storeID" as the store ID.
However, a couple more notes:
It might seem weird that you will be setting storeID: storeID - why is only the second one being evaluated? When I first started I had to triple check everytime that I wasn't sending "1:1" or something. However, keys aren't evaluated when you are using object notation like that, so only the second one will be the actual variable value.
No, it is not correct that you are calling the PHP file as ../ thinking of the JS file's location. You have to call it in respect of whatever page has this javascript loaded. So if the page is actually in the same directory as the PHP file you are calling, you might want to fix that to point to the right place.
Kind of tied to the previous points, you really want to get your hands on Firebug. This will allow you to see AJAX requests when they are sent, if they successfully make it, what data is being sent to them, and what data is being sent back. It is, put simply, the consensus tool of choice to debug your Javascript/AJAX application, and you should have it, use it, and cherish it if you don't want to waste another 6 days debugging a silly mistake. :)
EDIT As far as your reply, if you break down what you are returning:
[
{
"id":"9",
"name":"Brandstad Byporten",
"street1":"Jernbanetorget",
"street2":null,
"zipcode":"0154",
"city":"Oslo",
"phone":"23362011",
"fax":"22178889",
"www":"http:\\/www.brandstad.no",
"email":"bs.byporten#brandstad.no",
"opening_hours":"Man-Fre 10-21, L",
"active":"pending"
}
]
This is actually an array (the square brackets) containing a single object (the curly braces).
So when you try doing:
alert(data.name);
This is not correct because the object resides as the first element of the array.
alert(data[0].name);
Should work as you expect.
Your JSON is returned as a javascript array... with [] wrapping the curly bits [{}]
so this would work.
wrong: alert(data.name);
right: alert(data[0].name);
Hope that helps.
D
Ok, thanks to Darryl, I found the answer.
So here is the functional code for anyone who is wondering about this:
javascript file
jQuery(document).ready(function() {
jQuery('#storeListTable tr').click(function() {
jQuery.post("get_storeData.php", { storeID: this.cells[0].innerHTML }, // this.cells[0].innerHTML is the content ofthe first cell in selected table row
function(data){
alert(data[0].name);
}, "json");
});
});
get_storeData.php
<?php
include_once('dal.php');
$storeID = $_POST['storeID']; //Get storeID from jQuery.post parameter
$sl = new storeLocator();
$result = $sl->getStoreData($storeID); //returns dataset from MySQL (SELECT * from MyTale)
while ($row = mysql_fetch_array($result))
{
$data[] = array(
"id"=>($row['id']) ,
"name"=>($row['name']));
}
$storeData = json_encode($data);
echo $storeData;
?>
Thanks for all your help guys!