I know that I can't do this way, but it's to explain what I want to do! I have an array containing several values, result of a form, and I want to print in a file the lines containing these values. I try to do sthg like this: 
foreach my $paramKey (@params){
    $i = 0;
    open (FILE1, "<tabtext.txt");
    open (FILE2, ">ludo.txt");
    while(<FILE1>){
        if (/$paramKey[$i]/){
            print FILE2;
                   }
                $i++;
    }
    close(FILE1);
    close(FILE2);
}

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In reply to matching an array by Anonymous2003

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