Expire date help

Question

Hello every one im making a system for my class where students register to this sytems but the expire date the teacher can select if their adtional training will last 15 days, 30 days or 60 days for this i have a table where i register the students, also i have a table where the teacher can add more times and a table of the extra courses or extra weekend class
example
table user
idU int 11 autoincrement primary key
name varchar 255 and so one with the rest
grade
login
pass
email
active
level
table times
idTime
name (example 15 days class)
amount (this is where i can add the amount of days)
table courses
idCourse
idU
idTime
CourseName
startdate
enddate
i got everything working readed allmost every post on this forums on interkat forums but i have not been able to make a trigger that the end date takes the Startdate and adds from the other table the amount of days to display to the students, your course starts "startdate" and the final exame for it is "enddate" any ideas how can i grab the variable from the table times?? Btw sorry my very bad english.

Answer 1

Hi, Miguel
actually i have experienced this process before with one of my best friends
"Steven Mark", he faced the same problem as i think but with hard work and sharing some ideas with me he at least found the solution, but i need you to read the full messages we shared to know how!
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First of all i would like to thank you for creating, showing and explaning how constuct a product expiration. I thought your instructions and images were very good and simple to follow (http://www.developer-online.com/multi_upload/tutorials/part2/produtcs_update.html).
I have followed your instuctions in creating something similar, although I have not created a days calculated field in the mysql database as i have used a recordset in dreamweaver to calculate the DATEDIFF(date_expired_pd, current_date) which creates the same but is not adding extra storage to my database.
My problem is that in your example the user defines the expiry date.
I would like to define the expiry date and not the user but also adding on any extra days that have not yet expired.
For example if a user had 2 days until expiry and i gave the opportunity to extend the expiry date for a further 30 days plus the 2 days which have not expired.
I have tried to maniuplate the custom trigger but im no expert on this.
If you at all have time please could you look at what i have done to the code you have created to determine what i am doing wrong.
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The code:
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$exp_timed = $_REQUEST['date_expired_pds'];
$query = .KT_DynamicData("{rs.DATEDIFF(date_expired_pd, current_date}");
$noDays = $query + $exp_timed;
$exp_time = time() + $tNG->getColumnValue("date_activated_pd") + (60 * 60 * 24 * $noDays);
$exp_date = KT_formatDate(date ("Y-m-d H:i:s",$exp_time));
$tNG->addColumn("date_expired_pd", "DATE_TYPE","EXPRESSION", $exp_date);
return $tNG->getError();
The problem line is $query = .KT_DynamicData("{rs.DATEDIFF(date_expired_pd, current_date}");
I have tried so many varions such as $query = $row_rs['DATEDIFF(flatshares_pd.date_expired_pd, current_date)'];
The custom trigger will not allow me to get the DATEDIFF from a recordset as there must be something im leaving out.
This one line of code is messing everthing up.
If i use a simple $query = "2"; to represent 2 days then it all works. But of course not everyone will have more or less than 2 days to add.
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Then he found this:
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