Develop Reference

Fetch Current URL not getting ID , class based filters

I am trying to fetch my current page URL, for an if-else statement.
My URL is like this : http://something.com/fetch_url.php#filter=.apples
And my code is :
<?php
echo $_SERVER['REQUEST_URI'].'<br/>';
?>
It gives me :
/fetch_url.php only, but i need to check for #filter=.apples , in if-else case.
Please guide.

Try using a correct URL like http://something.com/fetch_url.php?filter=apples
# part in the URL never approach to a web server, therefore you cannot access it.
And use if statement like this.
if($_REQUEST['filter']=='apples'){
//then perform your action here according to requirements
}else{
// otherwise provide instruction for the else condition here
}

A # part in the URL can never reaches a web server, hence you cannot access it. One workaround that we have been using is to use Javascript to access it via window.location.hash, and then do a separate post to the server to obtain this hash, if it's necessary.
Similar question has been asked before: Get fragment (value after hash '#') from a URL in php

PHP $_GET and underlines

I have a very short piece of PHP that I use to make HTTP requests from JavaScript.
<?php echo file_get_contents($_GET['url']); ?>
I have used it successfully in a few projects, but am running into a problem with making requests in my current project. Based on my searching, I believe it may be caused by the underscore in the request, though through my searching and not knowing PHP, I have not been able to confirm that.
Below is an example of what I am doing from JavaScript:
$.get("grabber.php?url=" + "http://tidesandcurrents.noaa.gov/api/datagetter?station=8573364&begin_date=20160202&end_date=20160203&product=predictions&units=english&time_zone=gmt&format=json&application=poseidonweathercom+&datum=MLLW", function(forecast) {
console.log(forecast);
});
If I copy the url and put in it in a browser, I get back the JSON that I requested. When I use the code above, I end up getting an error message from NOAA:
Wrong Product : Product cannot be null or empty Wrong Time zone: Time zone cannot be null or empty Wrong Unit:Unit cannot be null or empty Wrong Format: Format cannot be null or empty Wrong Date: The beginDate cannot be null or empty
Do I need to use a regex for the underscore in PHP? Is there some other issue that I do not understand?
Thanks.

You need to send it encoded, which will convert all the underscores/spaces/ampersands etc. with their encoded equivalents:
var url = "http://tidesandcurrents.noaa.gov/api/datagetter?station=8573364&begin_date=20160202&end_date=20160203&product=predictions&units=english&time_zone=gmt&format=json&application=poseidonweathercom+&datum=MLLW";
$.get("grabber.php?url=" + encodeURIComponent(url), function(forecast){
console.log(forecast);
}
Using encodeURIComponent() on that URL shows:
http%3A%2F%2Ftidesandcurrents.noaa.gov%2Fapi%2Fdatagetter%3Fstation%3D8573364%26begin_date%3D20160202%26end_date%3D20160203%26product%3Dpredictions%26units%3Denglish%26time_zone%3Dgmt%26format%3Djson%26application%3Dposeidonweathercom%2B%26datum%3DMLLW
Alternatively, if you just want to access the JSON data and handle it within the JavaScript function, you can retrieve the data via the URL directly, without having to encode the URL:
$.get("http://tidesandcurrents.noaa.gov/api/datagetter?station=8573364&begin_date=20160202&end_date=20160203&product=predictions&units=english&time_zone=gmt&format=json&application=poseidonweathercom+&datum=MLLW", function(forecast) {
console.log(forecast);
});

Um why do you even need your php code ... the code below will work just fine and eliminate your server overhead.
$.get("http://tidesandcurrents.noaa.gov/api/datagetter?station=8573364&begin_date=20160202&end_date=20160203&product=predictions&units=english&time_zone=gmt&format=json&application=poseidonweathercom+&datum=MLLW", function(forecast) {
console.log(forecast);
});

How to scrape a JavaScript value in PHP

I’m new to PHP and coding in general and I can’t figure this out. I’m trying to get the number of kills from this profile page.
At the moment, the string I am trying to get is:
29362
When I view the page source, this number is nowhere to be seen.
When I use inspect element, however, I find:
<td class="num">29362</td>
How can I get the content shown in inspect element instead of the content shown by viewing the page source?

In using a tool like Firebug for Firefox, or the inspector for Safari and Chrome, you can see that at page load a series of AJAX requests are made for data. Though I didn't dig through all of the data returned by those requests, I do see the data you're looking for in at least one of them:
http://uberstrike.com/profile/all_stats/631163
So at page load JavaScript makes a series of AJAX requests back to the server to get all the data, then it manipulates the DOM to insert it all into the view.
If you wanted, your PHP could directly request the URL I pasted above and json_decode the response. This would produce a data structure for you to use which includes that number in the kills_all_time property.
Quick and dirty example:
<?php
$data_url = 'http://uberstrike.com/profile/all_stats/631163';
$serialized_data = file_get_contents($data_url);
$data = json_decode($serialized_data, true);
var_dump($data['kills_all_time']);

I looked and it looks like there is no API currently, so your best method will be to do an inter-web-server http request. Get the page you want and then it is a lot of string math from there.
I would recommend using string search to find <td class="name">Kills</td> and the kills row will appear right after it. From there its simply extracting the number using string math.

To add to what JAAulde has explained, it seems like there is a method to these AJAX requests. And they are all based on the profile ID that can be found at the end of the URL:
http://uberstrike.com/public_profile/631163
Then in the Safari debugger (which is what I am using) you can see these XHR (XMLHttpRequest) requests which are directly connected to API calls:
Then looking at the data in them shows some really nicely formatted JSON. Great! No scraping! So just go through these URLs to see what you can see:
http://uberstrike.com/profile/items
http://uberstrike.com/profile/user_info/631163
http://uberstrike.com/profile/user_loadout/631163
http://uberstrike.com/profile/all_stats/631163
And looking at the all_stats endpoint shows:
"kills_all_time":29362,
Nice!
So now let’s use some PHP json_decodeing like this:
// Set the URL to the data.
$url = 'http://uberstrike.com/profile/all_stats/631163';
// Get the contenst of the URL via file_get_contents.
$all_stats_json = file_get_contents($url);
// Decode the JSON string with the 'true' optionso we get any array.
$all_stats_json_decoded = json_decode($all_stats_json, true);
// Dump the results for testing.
echo '<pre>';
print_r($all_stats_json_decoded);
echo '</pre>';
Which will dump an array like this:
Array
(
[headshots_record] => 24
[nutshots_record] => 33
[damage_dealt_record] => 6710
[damage_received_record] => 31073
[kills_record] => 50
[smackdowns_record] => 45
[headshots_all_time] => 4299
[nutshots_all_time] => 1925
[kills_all_time] => 29362
[deaths_all_time] => 16491
…
Now to get kills_all_time just do this:
// Return the 'kills_all_time'.
echo $all_stats_json_decoded['kills_all_time'];
Which gives us:
29362

Reading contents from a JSON url and writing out those contents

I have a url [https://www.inquicker.com/facility/americas-family-doctors.json] that is a JSON data url. How can I access the contents of this url, and write out the values.
The format contains schedules as an array that inside it contains schedule_id, name, and available_times. I have tried various ways of getting the JSON file, but none have worked.
UPDATE:
Well I have got it this far with this code, and it's laying out what looks like objects from the array. So I believe I got the cross site issue under control. I just need to figure out how to access the data now.
<!DOCTYPE html>
<html>
<head>
<title>JQuery (cross-domain) JSONP</title>
<script type="text/javascript"src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"> </script>
<script>
$(document).ready(function(){
$.getJSON('https://www.inquicker.com/facility/americas-family-doctors.json',
function(data){
alert(data.facility);
$.each(data.schedules, function(i, name){
$('#names').append('<li>' + name.available_times[0] + '</li>');
});
});
});
</script>
</head>
<body>
<ul id="names"></ul>
</body>
</html>
Any help, or suggestions will be greatly appreciated, Thanks.

You cannot generally pass an Ajax request across domains. Normally a server will refuse any Ajax calls that don't come from the same source unless it is explicitly configured otherwise. I am guessing that you aren't calling from the same domain, given that you are using a fully-qualified URL. If you own the server, you will have to configure it to accept such calls from your other domain.
If this is not the case, launch the script in Firefox with Firebug running and look at the console output and tell me what error you get if any.
Once you manage to pass the JSON from your server back to the page, you will retrieve it in your JavaScript as a string. You then need to execute this function:
var jsonObject = JSON.parse(jsonString);
where jsonString is the string that you received from your server. jsonObject becomes an object representation of the JSON passed back to the answer that you can access using dot notation.

Try something like :
alert(json.facility);
There is no title json object in the url you have mentioned.

The JSON is already parsed when it comes to your function.
$.get('https://www.inquicker.com/facility/americas-family-doctors.json', function(result){
alert(result.facility); //Do whatever you want here
// result.schedules array is also ready
});

ScriptManager.RegisterStartupScript Keeps adding script blocks multiple times

I have an update panel with a timer control set up to automatically check for some data updates every minute or so.
If it sees that the data updates, it is set to call a local script with the serialized JSON data.
ScriptManager.RegisterStartupScript(UpdateField, GetType(HiddenField), ACTION_CheckHistoryVersion, "updateData(" & data & ");", True)
where "data" might look something like
{
"someProperty":"foo",
"someOtherProperty":"bar",
"someList":[
{"prop1":"value"},
{"prop2":"value"}, ...
],
"someOtherList":[{},...,{}]
}
"data" can get quite large, and sometimes only a few items change.
The problem I am having is this. Every time I send this back to the client, it gets added as a brand new script block and the existing blocks do not get removed or replaced.
output looks something like this:
<script type="text/javascript">
updateData({
"someProperty":"foo",
"someOtherProperty":"bar",
"someList":[
{"prop1":"value"},
{"prop2":"value"}, ...
],
"someOtherList":[{},...,{}]
});
</script>
<script type="text/javascript">
updateData({
"someProperty":"foo",
"someOtherProperty":"bar",
"someList":[
{"prop1":"changed"},
{"prop2":"val"}, ...
],
"someOtherList":[{},...,{}]
});
</script>
<script type="text/javascript">
updateData({
"someProperty":"foos",
"someOtherProperty":"ball",
"someList":[
{"prop1":"changed"},
{"prop2":"val"}, ...
]
});
</script>
with a new script block being created every time there is a change in the data.
Over time the amount of data accumulating on the browser could get potentially huge if we just keep adding this and I can't imagine how most people's browser would take it, but I don't think it could be good.
Does anyone know if there is a way to just replace the code that has been sent back to the browser rather than continuously adding it like this?

I came up with a hack that seems to work in my situation.
I am using jQuery to find the script tag that I am creating and remove it after it has been called.
Here is an example:
First I generate a guid:
Dim guidText as string = GUID.NewGuid().ToString()
I create a function like the following:
function RemoveThisScript(guid){
$("script").each(function(){
var _this = $(this);
if(_this.html().indexOf(guid)>-1)
_this.remove();
});
}
Then I add the following code to my output string:
... & " RemoveThisScript('" & guidText & "');"
This causes jQuery to look through all the scripts on the page for one that has the GUID (essentially the one calling the function) and removes it from the DOM.

I would recommend to use web service with some webmethod which you will call inside window.setInterval. In success handler of your webmethod (on client side) you can just take response and do whatever you want with it. And it will not be saved in your page (well, if you will do everything wrong). Benefit is that you will minimize request size(updatepanel will pass all your viewstate data, which could be large enough) and will limit server resources usage (update panel is causing full page live cycle, suppose slightly modified, but anyway - all those page_load, page_init, etc...) and with web service you will only what you need.
Here is an article where you can see how it could be created and used on client side. Looks like good enough.