Something like this is probably more what you are looking for:
my $sop = ...
my $sport = ...
while( <FH> ) {
# get the 9th element
my $port_a = (split /:/)[8];
# do the eval and capture the return value of comparison
my $result = eval "\$port_a $sop \$sport";
# exit if eval failed
die "eval error: $@" if $@;
if( $result ) {
# do something
} else {
# do something
}
}
You have to escape the variables you dont want eval to replace (string interpolate). And the "if" statement is redunant. You can just return the boolean value of the comparison.
