my $num_views = -1;
my $val = "23,452,789 views";

if ( $val =~ /(\b[\d,]+\b) views/ )
{
    ( $num_views = $1 ) =~ tr/,//d;
    print "# Matched number of views [$num_views].\n";
}
else
{
    print "# Error.\n";
}