I tried implementing your solution here:

use warnings;
use strict;

my $file = "/path/to/file.txt";

sub has_word {
    my $arg = $_[0];
    local $/;
    open FILE, '<', $file;

    while ( <FILE> ) {
        if ( /^ASDF_$arg/ && /magic/ ) {
            close FILE;
            return 1;
        } else {
            close FILE;
            return 0;
        }
    }
}

sub main {
    if (has_word("ONE")) {
        print "ONE already has the word.\n";
    } else {
        print "ONE does not have the word.\n";
    }
    if (has_word("TWO")) {
        print "TWO already has the word.\n";
    } else {
        print "TWO does not have the word.\n";
    }
}

main;

[download]

Content of file in this particular case:

ASDF_ONE {
    magic
    tmp
    tmp
}
ASDF_TWO {
    tmp
    magic
    tmp
}
string3 {
    tmp
    tmp
    magic
}

[download]

The output is not what I expect:

ONE already has the word.
TWO does not have the word.

[download]

Indeed, all the sections in this case have the word.

In reply to Re^2: Matching a string in a parenthesized block (regex help) by maxamillionk
in thread Matching a string in a parenthesized block (regex help) by maxamillionk

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