Ok, I'm open to suggestions, angel :), on my project. I've hit another roadblock and might be approaching this whole thing the wrong way. I was trying to create a small footprint of code and loop it all, but can't seem to get everything to work.
I want to print out 365 checkboxes (see attached image), then update a table in the database with the answer for 1(yes) or 0(no). I'm not sure if doing 365 updates all at once is the best idea or not, for each of my users.
My end game is this:
#1) print out 365 checkboxes
#2) check the individual users table to see which checkbox is already a yes, and check it for them (maybe with a value=$checked ?)
#3) allow my users to select/deselect one, or all at the same time and click submit, and update accordingly
Here is the code I have so far, which will print the table, create all the answer variables, then it will update the 1st box that is checked and nothing more for some reason.
any ideas would be appreciated!
loop of checkboxes
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You need to add a hidden input to handle the case of form submit. I changed the way the check boxes appear, I used control arrays in stead of answer1, answer2 ... there is a simple javascript code to select check boxes selected by the user when the form is postback. I hope this helps.
Try the following code:
You are right, I have added the code that saves data to the database later, I didn't check it. There was a syntax error with it. I also liked the expression "the white screen of death", cool!
I am attaching you the revised code along with a screen capture of what I got when I ran it, I hope you find it useful. I have commented out database code and replaced it with an echo statement.
The white screen of death
that works great!
I'm missing two things now:
#1) Yours is doing the same thing, it's updating the next record instead of the record selected (see above where #1 updated id #2, should be id #1)
#2) Once this is in the database, I need the script when it is first pulled up to see which of these are already a "1" and check them off
#1) You are right, your code was using echo ($loop365+1), now change it to:
<?php echo ($loop365);?>
Line 55 in the code I have submitted, two positions need to change.
#2) hmmm. Theoretically, you get the data from the database and extract it as string, separated with comma, no trailing commas, for example this is good 1,20,40,100 but this is bad 1,20, 40,100,
assign the value you have extracted from the database in $selectedValues variable, the javascript code will then check the corresponding check boxes. Put this code in the ELSE clause of:
if (isset($_POST['formPosted'
To be executed when the page has been loaded for the first time,
MySQL ignores updating a record if the new values are similar to those values already exist. For example if the date is '1/1/2009', answer=1 and id=100, MySQL ignores
UPDATE myTable SET date='1/1/2009', answer='1' WHERE id=100
because it is none sense to update it to values it is already have.
If mysql_affected_rows()=0 and mysql_error()="" then mysql has ignored the update statement.
Regarding #2:
Add ELSE clause to the following IF statement:
if (isset($_POST['formPosted'
In line 26, this code will be executed when the form is not yet submitted, the first time the page loaded. The code does the following:
1) Accesses the table and get answers where answer=1
2) Store those answers in a string variable comma separated.
Something like:
ok, that makes sense on the update routine.
#2 works great! you are a genius!
my last issue, #3, is my only remaining issue! right now, when the page is 1st brought up, and all the boxes are checked, if the user has made a mistake, and wants to deselect the box, it never updates the answer to 0. what is the best strategy for that?
There are tow appraoches you can select one of them:
1) Update all rows to zero first then apply user selections:
before the loop, UPDATE $createtablename SET answer='0' and execute the query, then the loop will run the query that updates user current selections.
2)If your table does not contain an autoincrement, the id is not an auto increment, then you can simply change the type of the update query, you can change it to delete first and then insert:
Before the loop:
DELETE FROM $createtablename and execute the query, then the loop will run the query that updates user current selections.
because your table always contains about 365 records, these addition queries will not affect the performance.
There are several methods also you can use, the above are the most appropriate to your condition as I can see. For example you can collect all ids for answer=1 in a variable similar to the technique I used to preselect on the first load, then run an update query after the loop completes something like
UPDATE $createtablename SET answer='0' WHERE ID NOT IN ('$selectedIdsVariable')
Business Accounts
Answer for Membership
by: profyaPosted on 2009-07-06 at 02:56:50ID: 24783714
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