mysql> SELECT `volume` , `temp` , `humidity` , `co2` , `pressure`  FROM `measurements` ORDER BY `ID` DESC LIMIT 1;

+--------+------+----------+-------+----------+
| volume | temp | humidity | co2   | pressure |
+--------+------+----------+-------+----------+
|  59.76 | 1.88 |     13.7 | 44.62 |        0 |
+--------+------+----------+-------+----------+

$sql         = 'SELECT  volume FROM measurements ORDER BY ID DESC LIMIT 1';

$sql         = 'SELECT  volume, temp , humidity  FROM measurements ORDER BY ID DESC LIMIT 1';
 $sql         = 'SELECT *  FROM measurements ORDER BY ID DESC LIMIT 1';

<?php
ini_set('display_errors', 'On');
error_reporting(E_ALL | E_STRICT);
$servername = "localhost";
$username = "XYZ";
$password = "12345";
$myDB = "database";
try {
    $conn = new PDO("mysql:host=$servername;dbname=$myDB", $username, $password);
    // set the PDO error mode to exception
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    //echo "Connected successfully";
    }
catch(PDOException $e)
    {
    echo "Connection failed: " . $e->getMessage();
    }


$sql         = 'SELECT  volume, temp , humidity  FROM measurements ORDER BY ID DESC LIMIT 1';

foreach ($conn->query($sql) as $row) {
  $first_volume = number_format ( $row['volume'],1);
  $first_temp = number_format ( $row['temp'],1);
  $first_humidity = number_format ( $row['humidity'],1);
  $first_co2 = number_format ( $row['co2'],1);
  $first_pressure = number_format ( $row['pressure'],0);
}
$conn = null;
?>

port                           = 3306
socket                         = /tmp/mysql.sock
user=root

[mysqld]
innodb_force_recovery = 0
datadir = /var/lib/mysql
max_allowed_packet=256M

# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
innodb_buffer_pool_size = 8M

# Remove leading # to turn on a very important data integrity option:
#logging
# changes to the binary log between backups.
# log_bin

# Remove leading # to turn on error logging.
log_error                      = hostname_error.log
#log_error=/var/log/mysql

# we have a read-only filesystem with one persistent writeable area only
# so point to this single writeable location
datadir = /var/lib/mysql/data

# These are commonly set, remove the # and set as required.
# lc-messages-dir = .....
# plugin-dir = .....
# basedir = .....
 port = 3306
# server_id = .....
pid_file                        = /var/run/mysqld/mysqld.pid

user=root
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
join_buffer_size = 8M
sort_buffer_size = 2M
read_rnd_buffer_size = 2M

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

if ( preg_match( "%^(www.)?livedomain.com$%", $_SERVER["HTTP_HOST"]) ) {
    define('APPLICATION_LIVE', true);
} elseif ( preg_match( "%^(www.)?devdomain.net$%", $_SERVER["HTTP_HOST"]) )  {
    define('APPLICATION_LIVE', false);
} else {
    die("INVALID HOST REQUEST (".$_SERVER["HTTP_HOST"].")");
    // Log or take other appropriate action.
}

2015-03-31T22:05:20.525812Z 2 [Note] Aborted connection 2 to db: 'database' user: 'root' host: 'localhost' (Got an error reading communication packets)
2015-03-31T22:05:21.897761Z 3 [Note] Aborted connection 3 to db: 'database' user: 'root' host: 'localhost' (Got an error reading communication packets)
2015-03-31T22:05:23.136331Z 4 [Note] Aborted connection 4 to db: 'database' user: 'root' host: 'localhost' (Got an error reading communication packets)

wait_timeout=2147483
max_allowed_packet=1073741824
interactive_timeout=90800
connect_timeout=31536000

max_execution_time = 30     ; Maximum execution time of each script, in seconds
max_input_time = 60     ; Maximum amount of time each script may spend parsing request data
;max_input_nesting_level = 64 ; Maximum input variable nesting level
memory_limit = 128M      ; Maximum amount of memory a script may consume (128MB)

root@Bone:~ netstat -a | grep mysql
tcp        0      0 :::mysql                :::*                    LISTEN
unix  2      [ ACC ]     STREAM     LISTENING       7347 /tmp/mysql.sock

00:19:38.400102 ARP, Request who-has 192.168.1.100 (d0:5f:b8:81:17:de (oui Unknown)) tell 192.168.1.200, length 46
00:19:38.400170 ARP, Reply 192.168.1.100 is-at d0:5f:b8:81:17:de (oui Unknown), length 28
00:19:40.399156 ARP, Request who-has 192.168.1.1 tell 192.168.1.200, length 46

root@Bone:/var ls -l ./pt-mysql-summary
-rwxr-xr-x    1 root     root        104093 Apr  1 00:10 ./pt-mysql-summary
root@Bone:/var ./pt-mysql-summary
-sh: ./pt-mysql-summary: not found

eth0      Link encap:Ethernet  HWaddr D0:5F:B8:81:17:DE
          inet addr:192.168.1.100  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::d25f:b8ff:fe81:17de/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1105 errors:0 dropped:0 overruns:0 frame:0
          TX packets:412 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:90361 (88.2 KiB)  TX bytes:68063 (66.4 KiB)
          Interrupt:174

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:11 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:937 (937.0 B)  TX bytes:937 (937.0 B)