Re: error checking a null array

From what I understand the simplest solution here would be to check to see if you have $_POST['cb'] in the first place. That would indicate if checkbox was selected or not. After, you have posted the form just do the following test. $check_box_exits = ((isset($_POST['cb']))? true:false); hope this helps... -sonu "Jack Jackson" <jackson.linux@gmail.com> wrote in message news:42EDA6B7.2090701@gmail.com... > hi, > I have checkboxes beging dynamically generated. to seperate tasks in error > checking I have added he arrays not just to $_POST but to $_POST[cb] so > names (derived from question numbers) are for example: > > $_POST[cb][7] > > A dump of $_POST would therefore include something like > > ["cb"]=> array(1) { [7]=> array(1) { [0]=> string(3) "124" } } > > So I did this: > > //error checking for checkboxes foreach ($cb as $cbkey => $cbvalue) > { > foreach($cbvalue as $cbkey2=>$cb_answers) > { > if( !array_key_exists($_POST[$cbkey], $cb)); > { > $message[$cbkey]=1; > } > } > } > > This almost works. The problem is that if someone doesn't check a > checkbox, NOTHING related to the checkbox gets sent to $_POST; if I insert > a hidden value of something, then that hidden value gets passed whether > the user inputs something or not, since I need an entirely server-side > solution. Is there a way to send something to tell the error checker > whether for example $_POST[cb][7] is empty or null, so I can set the error > message to one if it's empty? > > Dump of $_POST with no checkboxes checked > $_POST: > array(4) { ["action"]=> string(7) "process" ["cat"]=> > string(1) "2" > ["rs"]=> array(3) { [5]=> string(0) "" [6]=> string(0) > "" [9]=> string(0) > "" } ["b"]=> string(8) "Continue" } > > Dump of $_POST with checkboxes checked > > array(5) { ["action"]=> string(7) "process" ["cat"]=> > string(1) "2" > ["cb"]=> array(2) { [7]=> array(5) { [0]=> string(1) "3" > [1]=> > string(3) "124" [2]=> string(3) "125" [3]=> string(3) > "127" [4]=> > string(3) "131" } [8]=> array(3) { [0]=> string(3) "141" [1]=> > string(3) > "145" [2]=> string(1) "4" } } ["rs"]=> array(3) { > [5]=> string(0) "" > [6]=> string(0) "" [9]=> string(0) "" } ["b"]=> > string(8) "Continue" } > > > Thanks so much In advance