Modified ip_in_range() method for the "Limit Login Attempts Reloaded" WP plugin.

LimitLoginAttempts_ipinrange.php

	public function ip_in_range( $ip, $list ) {
		$bytes_ip = inet_pton( $ip );
		foreach ( $list as $range ) {
			$range = array_map( 'trim', explode( '-', $range ) );
			if ( count( $range ) == 1 ) {
				$bytes_range = inet_pton( $range[0] );
				if ( $bytes_ip === $bytes_range ) {
					return true;
				}
			} else {
				$low  = inet_pton( $range[0] );
				$high = inet_pton( $range[1] );

				if ( $low === false || $high === false || $bytes_ip === false ) {
					continue;
				}

				$low    = bin2hex( inet_pton( $low ) );
				$high   = bin2hex( inet_pton( $high ) );
				$needle = bin2hex( $bytes_ip );

				if ( $needle >= $low && $needle <= $high ) {
					return true;
				}
			}
		}

		return false;
	}