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Tutorial: How to build a poll system with PHP and mySQL
April 11, 2008,
48,309 views
1. Make a new database, i did this using phpmyadmin, call it whatever you want. I called mine simply ‘poll’. You will then be taken into the database screen where you should then click on import. Choose the file to upload and select poll.sql which can be downloaded from either in the poll.zip file above or directly from poll.zip. Click go, congratulations, you now have the database design needed to continue. Now that the sql is done, lets get going on the PHP.
2. Lets set up our work space. Make a new folder on your webserver and call it ‘poll’. This is not crucial, but it makes it easier for me to reference to you. Whilst in this new folder make a new file called config.php. Open up config.php
3. We will be using config.php to store our database connection in. It is quite typical for a low level website to handle all database connections from a config.php file. Higher end websites start to program their own database handling functions, that automatically take care of security issues and optimising query procedures. That is beyond the scope of our little poll system today. Look at the code below:
As you can see this handles the connection of php to mysql. I have set the four parameters up into variables, so that you can easily edit them. The first parameter is the hostname, usually this will be localhost, unless you are connecting to a database remotely, which is in my eyes, insecure. Next is the user name and password used to connect to the mysql server and database. The last option is the database name that we want to connect to, in this case it is ‘poll’ the database we set up. Please change the values now to reflect your setup.
You can test that the values are correct and all connections worked by navigating to the config.php file in your browser. If you just see a blank screen, then everything worked, no errors were reported. But if you see errors, go back and check your values.
Posted by VoiDeT –
70 Comments
voidet. Of course! Sent you some cash and put a link in.
Many thanks for your hard work!
Hey!
Thanks alot for the donation!
I really appreciate that! If people are using the tutorial as a learning tool i’m all for it, we both can build something up that way. But if people are going to use it for their own web apps, it’s not right to just take and not give anything back
But thanks alot for the donation! I am glad it worked out for you
Also if you need any future help with anything just let me know!
Honestly it was a learning tool for me. And I ended up using it successfully which I thought was very cool.
I am happy to give back and may call on you again. Thanks very much.
Hey Artech!
Really cool portfolio you have!
Love the graphics!
Thanks Voidet.
I enjoy working with flash. Creating with graphics in mind is usually how I approach things. But I’m getting more and more into the scripting side of things. Really appreciating the functionality and management.
You should get into the frameworks!
Just jump into CakePHP
will this code work if i want to ask a series of independant yes or no question that i want to rate separately?
This is a poll script.
To turn it into a survey type program would require some refactoring.
Not too much if you want it hardcoded, but alot if you want it to be dynamic
Hi, great tutorial, thanks man.
hi, anyone know how we get the value of $responses['total'] hmm i starter in php wondering where we get the ‘total’ from? thx for any help..
IZ please clarify here!
Do an echo $responses['total'] to output the total number of responses!
Really good tutorial!! THX!! I’m just modifying a bit to fit on my page and to my taste.
But again, thx, i learned a lot here!
Hi.. nice tutoria! i have a question
Warning: Wrong parameter count for max() in C:\wamp\www\poll\poll.php on line 17
what does it mean? and how can i solve it? thanks…
Hey Ralph,
Below “$query = mysql_query(“SELECT COUNT(`id`) as hits FROM `responses` GROUP BY `qid`”);”
Add:
$me = array();
thanks VoiDeT.. ill try it! ^__^
Hi, followed your tutorial, this is for personal learning.. im new to PHP. was a great tutorial even for those who don’t code all the time. I just had 2 questions, everything is up and working, but my main page is also called index.php, if i change the name of the index.php that you set as default would it still work fine?
also, how do i add more polls? i want to add atleast three or four questions, thanks.
Try changing the name and see what happens.
There might be references to index.php in the code, or it could just be SELF. I forget a lot of the code in this, as this desperately needs a re-write.
If you want to add more polls or questions you should do so in the database. However you will need to cycle through the polls somehow.
Thanks,
Richard
Thanks, I will try changing the name and see what happens, I basically want to have 3-4 polls running at the same time, if I cant sort it out I will have to stick to one poll
Hi Voidet,
I clicked on the link you give above but it seems to be malfunctioning…http://www.jotlab.com/tutorials/poll/index.php
++++++++++++++++++++++++++++++++++++++++++++++++Warning: mysql_connect() [function.mysql-connect]: Access denied for user ‘voidet_jotlab’@'localhost’ (using password: YES) in /var/www/jotlab.com/public_html/tutorials/poll/config.php on line 10
Warning: mysql_select_db() [function.mysql-select-db]: Access denied for user ‘www-data’@'localhost’ (using password: NO) in /var/www/jotlab.com/public_html/tutorials/poll/config.php on line 11
Warning: mysql_select_db() [function.mysql-select-db]: A link to the server could not be established in /var/www/jotlab.com/public_html/tutorials/poll/config.php on line 11
Warning: mysql_query() [function.mysql-query]: Access denied for user ‘www-data’@'localhost’ (using password: NO) in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 3
Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 3
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 4
Warning: mysql_query() [function.mysql-query]: Access denied for user ‘www-data’@'localhost’ (using password: NO) in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 13
Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 13
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 14
Warning: Wrong parameter count for max() in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 17
Warning: mysql_query() [function.mysql-query]: Access denied for user ‘www-data’@'localhost’ (using password: NO) in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 19
Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 19
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 21
Warning: mysql_query() [function.mysql-query]: Access denied for user ‘www-data’@'localhost’ (using password: NO) in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 77
Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 77
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /var/www/jotlab.com/public_html/tutorials/poll/poll.php on line 78
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
any help is always appreciated
rca08207 at bigpond dot net dot au
A very detailed and helpful tutorial indeed. Loved it. I made a collection of all such tutorials and scripts (including this one) at 11 PHP Voting Scripts and Tutorials. I hope it would be helpful to many.
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