Hello there, i am new on perl and i have this code :

    ##############################

    #!/usr/bin/perl -w
    
    #call of CPAN
    use warnings;
    use strict;
    use Cwd;
    
    #variables
    my $i=0;
    my $directory=    getcwd;        
    my $file="options";
    
    #opening output file and adding the header on first row
    open(FILE, ">>OLTP.txt") or die ("Could not create file OLTP.txt")
+;
    print FILE "User script,Serveur Name,Instance Name,Date of script,
+Serveur Name2,Instance Name2,ADVANCED_COMPRESSION~HEADER,TABLE_COMPRE
+SSION~HEADER,2,count,DATA_DICTIONARY_VIEW,TABLE_OWNER,TABLE_NAME,PART
+ITION_NAME,COMPRESSION,COMPRESS_FOR,\n";
    close FILE;
    
    #loop while files are found
    foreach my $files ( list_files( $directory, 1,$file ) ) {
        print "File : $files\n";
        singlefile($files,$file);
    }
    
    #recursion and list integration
    sub list_files {
        my ( $directory, $recurse,$file ) = @_;
        require File::Spec;
        # Search in subdirectory or not
        if ( ( not defined $recurse ) || ( $recurse != 1 ) ) { $recurs
+e = 0; }
        # verification directory
        if ( not defined $directory ) { die "No named directory\n"; }
        # Opening a directory
        opendir my $fh_rep, $directory or die "Can not open directory 
+$directory\n";
        # List files and directories, except (. and ..)
        my @fic_rep = grep { !/^\.\.?$/ } readdir $fh_rep;
        # Closing directory
        closedir $fh_rep or die "Unable to close directory $directory\
+n";
        #fill list with found files
        my @files;
        #file or folder? if file: add files to the table. if record: s
+tart the recursion
        foreach my $nom (@fic_rep) {
            my $mycurrentfile = File::Spec->catdir( $directory, $nom )
+;
            if ( -f $mycurrentfile  and  $mycurrentfile=~ m/$file/ and
+ $mycurrentfile =~ m/\.csv$/i){
                push( @files, $mycurrentfile );
            }
            elsif ( -d $mycurrentfile and $recurse == 1 ) {
                push( @files, list_files($mycurrentfile, $recurse,$fil
+e) );    # recursion
            }
        }
        return @files;
    }
    
    ##merge data after filtering
    sub singlefile {
        my ( $file,$out) = @_;
        #open file
        open(FILE, $file) or die ("error occured while opening file");
        #create list from file
        my @save = <FILE>;
        close(FILE);
        #empty table rows which do not meet criteria
        foreach (@save){
            $_ = "" unless ($_ =~ m/"ENABLED","OLTP",/ && $_ =~m/^GREP
+/ );
            $_ = "" if ($_ =~m/SYSMAN/|| m/SYS/);
            chomp $_;
            
        }
        #open output file, add data, close
        open(FILE, ">>OLTP.txt") or die ("error occured while opening 
+file OLTP.txt");
        foreach (@save){
            print FILE $_."\n" if ($_);
        }
        close(FILE);
    }
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the code seems to do the following :
- create txt with header
- create list of files based on every files that match with criteria (option, csv)
- for each files of the list, fill with all rows and then remove what do not match with the criteria "unless" and "if"
- push everything into the file with header (oltp.txt)

My Goal :
- create txt with header
- create list of file based on every files that match with criteria (option, csv)
- for each files of the list, **fill only with the First rows that match with the criteria "unless" and "if"**
- push everything in the file with header (oltp.txt). the final result should be the txt with header and then, only 1 line per files (if the criteria match).
many thank for your help
OliverR