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Posted by plato on 09/21/05 00:45
"Sander" <swuste zit bij cartel.nl> wrote in message
news:43301fef$0$11867$ba620dc5@text.nova.planet.nl...
>
> "plato" <platoTAKETHISOUT@telpacific.com.au> schreef in bericht
> news:43300681@news.rivernet.com.au...
> >I think this is more php than sql.
> >
> > I want to create a form which has a check box which adds entries to a
> > database e.g. value= course_1 and also on the form is a number denoting
> > places available e.g. value = places_1
> > <check box> Course 1 (There are 11 places available)
> >
> > each time a form with a course selected is submitted the next time the
> > form
> > is accessed it reduces the places available by 1 until it reaches 0 when
> > an
> > error message is returned.
> >
> > Can someone give me an idea of the script I can use to practice this?
>
> What you basically want is a php page that refeshes the free place for a
> certain course. So lets just assume you have:
> coursename places_avail
> course_a 3
> course_b 15
> course_c 9
>
> You want you'r page to read the course name's, put them in a drop-down
list,
> and print the availability at the very end.
>
> We can start with just a very simple script like this:
> <?PHP
>
> //alter you variables here
> $host = "localhost";
> $username="";
> $password="";
> $database="";
>
> // create link to database
> $link = mysql_connect($host, $username, $password)
> or die("Cannot connect to database");
>
> mysql_select_db($database)
> or die("Cannot select database");
>
> //now we make te query which will ask the database for the course
> information
> //change the my_table to your course table name
>
> $query = "SELECT * FROM my_table";
> $result = mysql_query($query)
> or die("Query cannot be executed");
>
> //now we are going to print the information to your screen
> while ($row = mysql_fetch_array($result, MYSQL_BOTH)) {
> printf ("Coursename: %s Availability: %s<br>", $row[0],
$row["1"]);
> }
> ?>
>
> It is just that simple. Next you have to do is put them i a drop-down
menu.
> That is nothing more that changing the printf to something that included
the
> HTML tag <OPTION>.
>
> You also want to update your page. That is just an update or insert in a
> mysql and after refreshing the current page things will work just as you
> wanted.
>
> I hope this solves your question. If you need more on this. You know where
> to find the answers... here.
>
> Sander Swuste
>
Thanks Sander I will give it a go...much appreciated.
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