Assuming that the form has input fields named:
val-i-j, where i and j are subscripts of the coefficients in the matrix, the following code puts all the information in a 2D array called @matrix. The specialty of this snippet is that is works with imaginary numbers as well as real numberr. (Both i and j can be used to refer to sqrt(-1) )
use Math::Complex;

# Get the data, put it in hash called: %form

if($ENV{'REQUEST_METHOD'} eq 'POST'){
    read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
    @pairs = split(/&/, $buffer);
}
else{
    @pairs = split(/&/, $ENV{'QUERY_STRING'});
}

foreach $pair (@pairs){
    local($name, $value) = split(/=/, $pair);
    
    $name =~ tr/+/ /;
    $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
    $value =~ tr/+/ /;
    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
    
    $form{$name} = $value;
}    



    for($i=1;$i<($var_no+1);$i+=1){
        for($j=1;$j<=($var_no+1);$j+=1){
            $deger = "val-".$i."-".$j;
            @kompleksler = split(/\+/,$form{$deger});
            $imaginary = 0;
            $real = 0;
            foreach $complex (@kompleksler){
                if($complex =~ m/(i|j)/){
                    $imaginary += $complex;
                }
                else{
                    $real += $complex;
                }
            }
            $matrix[$i][$j] = cplx($real, $imaginary);
        }
    }

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In reply to Obtain matrix info by sinan

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