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I have a website run by php. I have about 80 users that will be signing up within a hour period.
my question is are there any problems that could occur when having lots of people accessing my database all at once?
I mean 80 users is a lot for me, and if some of you people that have way more than that are laughing at me, how many people would it take to mess up a database?
Thanks in advance!
You could use a tool like apachebench to check. Then you could use tools like memcached (or memcachedb if you needed persistence) to dial down the mysql queries. I would also set up mysql slow query logging.
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I was wondering which is the most efficient. Assigning 7 session variables when the user is logged in or passing the user ID and making new sql queries when the information is needed. I want to cater for mobile users with low download allowanaces as well and we don't have free wifi around here.
PHP is all done server side so I don't think there are any considerations here for mobile users, other than the usual ones such as keeping the page downloads small and accessible. In other words, the server resources are the bottleneck here, so go whichever way you like! Generally speaking storing values (caching) is going to be faster in terms of processing, but could use more memory than fetching stuff as you need it.
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I would like my users to able to chat with one another.
I currently use angularjs as the front-end and PHP in the back-end.
any ideas?
You should be looking at different languages for this. Node.js, MongoDB and Redis is a good start.
Also, just expecting people to give you code with such a vague request is not really in line with the spirit of things here. There are plenty of good examples online and a simple Google search would give you results like this https://github.com/joni2back/spachat if you're really keen on using PHP and Angular.
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I am building an examination system. I was wondering, could I take random photos of the person taking the exam in random intervals? The students will be required to allow the site to use the camera for them to access the question. The system will then take random photos in random intervals. I want to use PHP or anyone with an idea how I can go about it?
Javascript is more suited for that kind of task. Check out this API for more informations ΒΈ
Edit, You should take in consideration that not alot of browsers allows it. it seams to be more accepted in mobile browser.
Hopes it helps !
Nic
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i want to login from my website via link on a partnership website. To program this with PHP, is not a problem for me. But i ask myself if there is a standard or good practice to do this.
My current solution is to use a proxy. Does anyone have a better idea?
Many thanks.
You should definitely take care that the link for log in on that partner website is only valid once. Moreover, you should take care of timing attacks, etc.
The best thing is that you use one-time tokens and that your websites communicate with each other via an internal API. This prevents most of the issues.
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I want to create a chatbox like gmail or facebook. What would be the best architecture to build it. Should It be good to use sockets or ajax?
If so, then would you please describe or give references of the architecture.
I'd suggest XMPP. I used it to design a chat system for within my companies software, and it worked quite well. There are plenty of XMPP libraries out there. If you were so inclined though, it it possible to use some of Google's services. Not everything needs to be written from scratch:
https://developers.google.com/talk/open_communications