Is this possible to take screenshots of windows's screen of client users using a PHP application?
If you want to capture the current client web page, you should look into JS solutions (see this related SO answer):
html2canvas
npm packages with keyword ‘screenshot’
You may also be able to programatically load and render HTML with a GET request, though you will still need to run JavaScript to render the full web page on the server side.
If you mean a screenshot of the actual desktop, I fear only the browser would be able to do it and this is still at an experimental stage, probably due to security concerns:
Chrome desktopCapture extension
MDN Media Capture and Streams API
Can I use media capture?
Edit: Possible duplicate of this question. Some back-end libraries to render a web page:
dompdf (PHP5)
wkhtmltopdf (C++)
Related
I am new in PhoneGap,
I have a Joomla Site, I want to create a PhoneGap App using that Joomla site. so is this possible ? if yes than how can i implement it ?.
You can use. But you have to create web services for request and responses. Because Phonegap will not run PHP script. So you can create webservices to access Joomla functionality via JSON responses from your joomla. You can get the JSON data via jQuery in your phonegap app.
and someone said PGBuild will convert webpage into phonegap app. You can try it also.
I have succeeded creating an application as follows:
Design your Joomla page so it's responsive and renders correctly on your mobile;
Download the whole thing with wget
Edit all urls and make them point to the right (local-remote) locations.
I saved all css, images, js locally so the page would load even offline; then changed all the links so they point to the remote host;
All forms should point to the remote host;
Most modules and components were changed so after the initial display (local) they will load the updated info in the frame.
Popups won't be available, so you'll need heavy workarounds for facebook integration etc.
Also, if you plan to use any phonegap features, they will only be available if you load the library inside your downloaded page; this will force you to change all calls to ajax (no document.location.href calls are possible since you'll lose the phonegap javascript).
The first time you load the page from the server it will take forever to load. Ensure you have proper caching set up otherwise you'll just lose your customers.
My advice is to start with an ajax project at the very beginning, it will save you lots of headaches.
Keep in mind, if you plan to use iframes, forget it. They work lousily on iphones, and debugging is nearly impossible. Simply take your time to plan a real phone app in javascript & using Ajax for the calls.
You don't need any webservices in Joomla for loading content, simply use:
&tmpl=component
when you need the content of a module.
Additionally, for blogs and lists, Joomla makes RSS feeds available so you shouldn't need too much coding to achieve this.
I have limited myself to ajaxifying the modules, which makes caching more efficient on the server and the interfaces appear more dynamic.
I use html5 + css3 + jquery mobile to built my mobile application. Actually I've already desktop version, and i want to make mobile application.
Is that true php wont work on html5 for mobile application?
If that true, i use ajax for call my JSON (that place create on jsontext.php).
I tried HTML5 on desktop browser and it worked.
I built it to apk using build.phonegap.com and install the apk to my device.
After that, my database record not showing. Maybe it didn't execute.
Other user in stackoverflow said we can use backbone.js. how-to-access-a-remote-database-from-jquery-mobile-application
are my steps right? or I have to use backbone.js. THX.
Here's some answers:
Yes, php won't work in a mobile native/hibrid mobile application,
because php needs to be interpreted by a php server before
generating output.
Its easy and simple to both generate and parse JSON, it's widely
used in apps.
That is good. If you want an 'online-only' kind of app, you can use
a webview and point it the url of your app - its basically a browser
without navigation buttons and user interface - but something's
don't work that well, you should test before. It may also display
your app as sluggish and unpolished.
No problem with that, Cordova/Phonegap is actually becoming a very
good mobile framework. You should also install ADB
(http://developer.android.com/tools/help/adb.html), ADT
(http://developer.android.com/tools/help/adt.html) and the Android
device emulator
(http://developer.android.com/tools/help/emulator.html).
You must be sure on how to insert and retrieve dabatase records.
This depends on how you programmed it. Be sure to have the database
available publicly (accessible only from the apps, though).
Hope I've answered your questions, and that it helped.
I have a two part question. The first I think I have an okay answer to....
I am looking to force an external program to be called up to view a configuration file for an application my company is working on. The basic gist I guess is to set the Content-type header to type that your application is associating with, and then serving the contents of the file. I was thinking its simply structured like this:
<?php
Header( "Content-type: application/blahtype" );
?>
output of xml configuration file goes here...
Any other best practices here? Obviously the user is going to have to allow the external application access to this file universally in all browsers, unless they have a plugin installed in their browser that will handle the content-type, like adobe pdf. This isn't viable for our company right now, so we're willing to live with the confirmation screen.
The second part of the question is a little bit more complex, I think. How do we detect if the user has the application installed, and if they do not, serve them different content (a sign up page, or the application executable itself)? I'm not wondering about the logistics of serving different content, but simply the detection process. Is it possible for an application to install a lifetime cookie in the browsers cache installed on the machine? That's not a perfect solution, because the user could clear their cache of course. How else can we accomplish this?
Examples of programs that do this are Amazon MP3 Downloader (I've actually gotten into a bad state with this once or twice), and iTunes U. You can see iTunes U example on Stanfords CS193P page here: http://www.stanford.edu/class/cs193p/cgi-bin/index.php
Much appreciate any advice,
Josh
For part 1 of your question, as long as your application is correctly registered to handle that MIME type, then, yes, the browser should [prompt the user and launch your application](http://msdn.microsoft.com/en-us/library/ms775148(VS.85).aspx "MSDN: Handling MIME Types in Internet Explorer").
An alternative approach would be a [protocol handler](http://msdn.microsoft.com/en-us/library/aa767914(VS.85).aspx "MSDN: Registering an Application to a URL Protocol"). Instead of registering a MIME type for your application, you register a “protocol” that goes in a URL, in place of the http://. If your protocol is called myapp, then you could create links like this:
Link
While you can only pass a small amount of information this way, you could pass a GUID or tag that the application, once launched, can use to retrieve the full document from your server.
Edit: For part 2 of your question, iTunes uses a plug-in. Looking at the code that’s used to redirect to iTunes, you’ll see something like this:
<Object id="iTunesDetector" height="1" classID="CLSID:D719897A-B07A-4C0C-AEA9-9B663A28DFCB" width="1"></Object>
It’s followed by some JavaScript to detect whether that plug-in was loaded. If it was, then iTunes must be installed and it launches iTunes using the itms: protocol (just like the myapp: protocol in the example above).
The problem here is, you would have to write a browser plug-in.
It may be a good idea to look into using browser extensions for things like this.
I am developing an application where I need to record voice(for those who does not have a webcam so they can use only microphone to record voice) or video(those who have a a webcam - like laptop or external) files and save them on server, thereafter save the file name and logged in users id on database for later access.
I know I need to use some sort of flash app for this. But is there any free one which could server this purpose or even if there are paid ones which could serve this purpose that would be great. I tried google but may be I was not being able to go after the proper term or something, I could not succeed finding a proper solution for this.
Please, help me out!
You can do that simply using jRecorder, a jQuery plugin. You don't even need a Flash Media Server or RED server. JRecorder is same as jPlayer, you can use jQuery and HTML to design your recorder and you don't even need Flash or Action script knowledge for this.
jRecorder uses 1 pix hidden swf file which manages all the recording / previewing and sending the file data (wav file) to a URL you defined (Where you can write code in PHP or Java to receive a POST file)
It is quite simple and tidy.
You can download this Plugin from:
http://www.sajithmr.me/jrecorder-jquery
I have same feature in our latest project, the client want to have video recording from webcam and the video appear in the user's profile page.
For the server, we implement the RED5 server. It need a Java virtual machine in your hosting. You can read the detail requirement and installation instruction in the website.
To handle recording, we develop our own flash application, because the client request a custom interface to match with the overall website interface. I don't know the detail, since we outsource it to a fellow flash developer. Maybe you can see follow this thread, the development of flash recording by JeroenW.
To play recorded video, you can use any flash video player that support playing rtmp video source. You cannot play the recorded flv file in RED5 directly, since the file lack of metadata required by the player. Serving the recorded file as rtmp is done by RED5.
In addition to red5 there is Adobe's own Flash Media server that allows you to record audio/video straight to the server.
Or if you feel geeky you might be able to put together your own solution for this using a socket connection to the server and decoding the stream yourself on the server side. You should be able capture the audio/video locally into memory and then feed the byte stream up to your own server application.
There are Open Source solutions but you will need an own server to run them.
There is no way to run these things from shared hosting except if your provider is really nice, and ready to install the necessary software.
I asked the same question a few weeks back, check out the answers.
This question when googling "How to record audio php" comes up first so here for anyone from the future.
A simple way to record audio with flash and save it with PHP:
https://github.com/clouddueling/SimpleRecorder
Record audio, post audio data to your choice of url.
You could try recordmp3online.com which has an SDK. The nice thing about this one, is that it doesn't need a third party server(ala Red5), and supports mobile devices that don't have flash installed.
I need help finding resources that would help me or at least point me in the right direction in building a Flash media server/PHP application. I basically want to improve my current application by instead of progressive download using flash media server so that the videos will not only stream well but they can't be downloaded by the end user.
What the current application does is show a login form on the homepage and then when logged in the user can then navigate the site by choosing videos from a particular video category or video uploaded by a specific user. All this is done with PHP. The video page uses progressive download to display the video after the video ID has been passed using PHP.
I need to know how PHP and flash media server work together. Are there any resources out there where I can find a good application example (really simple) that demonstrates how PHP and flash media server can be used to stream videos dynamically such that PHP checks for the login, video ID, video channels, and video category information while the flash media server streams the video.
Really, PHP and FMS shouldn't be talking at all. It can be done within FMS, but a much easier approach is to let your Flash Player (which you'll have to have anyway) do the talking to FMS. Flash to FMS communication is well documented and very easy. Just have the PHP call forth a Flash video player with whatever info you need. It would probably be eaiser to have PHP authenticate and give the Flash some sort of authentication token if you're really worried about security.
Just so you know though, just because your media is streaming doesn't mean someone can't download it. There's several tools to rip streamed media out there. It is of course more secure, but it's not full-proof.
You may want to try Red5 instead of Flash Media Server. I've use Flash Media Server in the past and it can be a pain to take care of. With Red5 you at least have more flexibility and it is free. If you go down the Red5 path you will find more people customizing it like this one time ticket for Red5 post. I believe that is very close to what you are looking for.
The biggest problem with PHP and Flash (mediaserver) is the different "flow" of code.
PHP is straightforward:
Start request, do something, send response. Done.
Flashmedia only loads (compiles) your code when a client connects, and then only events are triggered. Most operations do not return, but need a callback.
Load application.. wait for something.. Event launched: do something, fire off another request together with a response handler object.. etc.
I have build an extensive chatservice with FlashMedia server and PHP as front and back-end.
The front-end is simple: just plain PHP/HTML-pages which will eventually create an <OBJECT>-tag loading some Flash applet.
That flash applet should connect to the Flash media server using information/credentials passed to it with the FlashVars-option or loaded (generated) XML-data from a separate URL.
From that point, the Flash applet (client) does it's thing with the Flashmedia server.
For this example, you want to verify credentials from the Mediaserver. You should use the AMFPHP framework for that.
AMFPHP is a replacement for Macromedia's "Flash Remoting" system where Flash [applets/servlets] can do asynchronious communications over HTTP.
For the AMFPHP-framework you write an interface class wrapping your credential-validation code. There is a test-page which validated the response of your wrapper.
(The AMFPHP Framework can also generate AS2 sample code so you have an idea how the Flashmedia server should send an request and handle responses.)
A warning: AMFPHP uses POSTs to send
and retrieve data. In the past,
there were problems when more than
2k of data was truncated. I now only
use it for relative short messages.
AMFPHP is very reliable. You can use it to do external logging for example.
Using flash media server so that the
videos will not only stream well but
they can't be downloaded by the end
user
This won't really work. It make make it "harder" for some people in the same way that not putting a big, huge "download here" button makes it "harder", but the content is still being downloaded to their computer, just in a different way. Anything that's downloaded can be saved to the disk.
I am doing similar thing. First, for authentication, you can use FMS's authentication plug-in. Of course, you can make your own stuff in PHP. Instead of adding PHP into FMS's original Apache, I decided to run XAMPP in parallel, with different port of course.
To start and stop the encoder, you can make use of FMLEcmd command.
My environment:
Flash Media Development Server 3.5
Flash Media Live Encoder 3.1
XAMPP (at port 8080)