I need some help understanding this code: a subroutine reads in an HTML template and does this switch for checkboxes 
s|(<input type=checkbox)(.*)( name=)(\w+)|$1$2$3$4 $check{$4}|ig;

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Then:
    foreach  ($query->param) 
    {    
         $in{$_} = $query->param($_);    
        if ($_=~/^c_/) { $check{$_}="CHECKED"  
                print OUT "$in{$_}\t";
}

[download]
My problem is that i'm writing everything to a tab delimited file (file.xls). When the checkbox isn't checked it's blank and doesn't write anything to the file, but I want it to write something like "no data" so that everything lines up. Anyway, i need to understand the above code. Like why is $check{$_} being set to "CHECKED" everytime? Oh, checkbox names must be c_xxxxx

In reply to checkbox help by djbryson

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