# The while loop reads each line of the file, one at a time. You can
# then process each line individually.
while( <INFO> ) {
    chomp( $_ );     # This removes the newline from each line.
    # Add code to process each URL.
}

##</code><code>##

open( INFO, $file );
# This will only read the file up to the first newline. If the lines
# in the file are delimited with newlines, it will read the first
# line in the file and stop.
my $line = <INFO>;     
close( INFO );
chomp ( $line );
# Add code to process the first URL.

##</code><code>##

# Removes newlines from each array element at once.
chomp( @lines );