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Inserting / updating multiple checkbox values into a field using php / mysql

Posted on 2007-12-05
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Last Modified: 2013-12-12
Hi, I've been trying to set up a form using checkboxes to update multiple values into a field database (MYSQL) using php.  Can multiple values be inserted into a single field name within a table?, and if so, how can I insert them using checkboxes??  I've included the code example to give you an idea of where I am.......

Cheers
<?php
$names = $_REQUEST['category'];
foreach ($arr as $names)  {
 
$updateSQL = sprintf("UPDATE Table SET category='%s' WHERE id=%s", $names, (int)$_SESSION['user']->getID());
}
?>
 
<form name="updateForm" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
 
<input type="checkbox" name="category[]" value="orange"></input>Orange
<input type="checkbox" name="category[]" value="purple"></input>purple
 
<input type="submit" name="sender" value="Save Profile">
 
</form>

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Question by:Simbob
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14 Comments
 
LVL 20

Expert Comment

by:steelseth12
ID: 20413488
You want to add multiple rows ? or add all the values in a single row ?
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Author Comment

by:Simbob
ID: 20414071
I want to add all or some of the checked values in a single row preferably.  What do you think the best solution / code is for this?
0
 
LVL 21

Expert Comment

by:nizsmo
ID: 20415476
Hi Simbob,

Is serialization an option?

If you serialize the array, and want want to retrieve it later, you can unserialize() it using the unserialize() function, which turns it back into an array.

Hope this helps.

<?php
$names = serialize($_REQUEST['category']);
$updateSQL = sprintf("UPDATE Table SET category='%s' WHERE id=%s", $names, (int)$_SESSION['user']->getID());
?>
 
<form name="updateForm" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
 
<input type="checkbox" name="category[]" value="orange"></input>Orange
<input type="checkbox" name="category[]" value="purple"></input>purple
 
<input type="submit" name="sender" value="Save Profile">
 
</form>

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Author Comment

by:Simbob
ID: 20418625
Hi, I've tried the serialize option, and still I'm getting array being posted with no values.

How do developers usually store / post multiple values from checked lists?  I could always create separate field names to store the checked values, but then this seems like a long-winded route and more complicated to retrieve...

Any further ideas?
0
 
LVL 20

Expert Comment

by:steelseth12
ID: 20418869
Simbob what are you trying to achieve ? ... serializing the data and storing it in  the database will make the information unusable until they are retrieve and unserialized.

E.g

SELECT * FROM table WHERE catagory = 'blue' will not work.

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LVL 20

Expert Comment

by:steelseth12
ID: 20418944
Again i dont know what your and goal is ... but the standard design for this would be

TABLE users
user_id
category_id

TABLE categories
category_id
category_name

TABLE users_categories
user_id
category_id

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Author Comment

by:Simbob
ID: 20419449
Sorry for sound amateurish :0)

Basically I'm trying to post multiple checked values into a single field for e.g

if orange and purple are both checked, then post / update these values as "orange purple" into the ['category' ] field in the users 'Table'

My database structure is simply:

TABLE: users
FIELD NAME: category

Hope this helps in my explanation.  
Cheers
0
 
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Expert Comment

by:jaydm
ID: 20429806
You would probably want to build up the list of categories first - then do the update.

Here is an example (of course you know that with this code sample, there is no actual execution of the sql).
<?php
	if (isset($_POST["submit"])) {
		$categories = "";
 
		for ($i=0; $i < count($_POST['category']); $i++) {
			$categories = categories . $_POST['category'][$i] . " "; 
 
		$updateSQL = sprintf("UPDATE Table SET category='%s' WHERE id=%s", $categories, (int)$_SESSION['user']->getID());
	}
?>
 
<form name="updateForm" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
 
<input type="checkbox" name="category[]" value="orange"></input>Orange
<input type="checkbox" name="category[]" value="purple"></input>purple
 
<input type="submit" name="sender" value="Save Profile">
 
</form>

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0
 
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Expert Comment

by:jaydm
ID: 20430160
Oops, I forgot the closing brace from the for loop.
<?php
        if (isset($_POST["submit"])) {
                $categories = "";
 
                for ($i=0; $i < count($_POST['category']); $i++) {
                        $categories = categories . $_POST['category'][$i] . " "; 
                }
 
                $updateSQL = sprintf("UPDATE Table SET category='%s' WHERE id=%s", $categories, (int)$_SESSION['user']->getID());
        }
?>
 
<form name="updateForm" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
 
<input type="checkbox" name="category[]" value="orange"></input>Orange
<input type="checkbox" name="category[]" value="purple"></input>purple
 
<input type="submit" name="sender" value="Save Profile">
 
</form>

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0
 
LVL 2

Expert Comment

by:jaydm
ID: 20430200
I won't repost the code, but if (isset(... should be:

if (isset($_POST["sender"])) {

I didn't correct the variable name to reflect the name you have in the form.
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Author Comment

by:Simbob
ID: 20442502
Ok, thats great jaydm - how would I build up the categories first as you mentioned??  

I've used the code as you explained, but when I post the information I only manage to update the last checkbox record instead of all checked checkboxes....

I've read somewhere else that a foreach loop could be used - would this be relevant in this case?

Cheers.
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Accepted Solution

by:
jaydm earned 500 total points
ID: 20443494
Sorry, I had a typo on the "$categories = $categories....." line.

I forgot the '$' after the equals sign.

The following should have all of the problems corrected.
<?php
        if (isset($_POST["sender"])) {
                $categories = "";
 
                for ($i=0; $i < count($_POST['category']); $i++) {
                        $categories = $categories . $_POST['category'][$i] . " "; 
                }
 
                $updateSQL = sprintf("UPDATE Table SET category='%s' WHERE id=%s", $categories, (int)$_SESSION['user']->getID());
        }
?>
 
<form name="updateForm" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
 
<input type="checkbox" name="category[]" value="orange"></input>Orange
<input type="checkbox" name="category[]" value="purple"></input>purple
 
<input type="submit" name="sender" value="Save Profile">
 
</form>

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0
 

Author Comment

by:Simbob
ID: 20443656
Excellent!  It works now!!

Thanks for your help Jaydm
0
 

Expert Comment

by:boypetiks
ID: 20747164
Hi, I'm trying to build a form which include a couple of text fields and check boxes, the purpose of the form is basically for reporting, data can be added and deleted, example:
text fields such as: first name, last name, street address, city, state, zip
check boxes: Purchase, Cashout, Refinance, Second Mortgage, Others

I don't have problem saving the data for each text fields, my problem is how can I save the selected value for each checkboxes, so I could retrieve and print the report later on. thank you for your help.
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