<?php
$dbusername = "name";
$dbpassword = "password";
$server = "ipserver";
$dbconnect = mysql_connect($server, $dbusername, $dbpassword);
$dbselect = mysql_select_db("test",$dbconnect);
$sql = "INSERT INTO sensor1(value1,value2,value3,value4,value5,value6,value7) VALUES ('".$_GET["value1"]."','".$_GET["value2"]."','".$_GET["value3"]."','".$_GET["value4"]."','".$_GET["value5"]."','".$_GET["value6"]."','".$_GET["value7"]."')";
mysql_query($sql);
?>

ALTER TABLE `sensor` ADD COLUMN `date` TIMESTAMP DEFAULT CURRENT_TIMESTAMP

ALTER TABLE `sensor` ADD INDEX (`date`);

SELECT `value2`,`value4` FROM `sensor` WHERE DATE_FORMAT(`date`,'%Y-%m-%d) = ?;

$today = date('j');
$sql = "INSERT INTO sensor$today(value1,value2,value3,value4,value5,value6,value7)
VALUES ('".$_GET["value1"]."','".$_GET["value2"]."','".$_GET["value3"]."','".$_GET["value4"]."','".$_GET["value5"]."','".$_GET["value6"]."','".$_GET["value7"]."')";

$dbconnect = new PDO("mysql:host=$server;dbname=test;charset=cp1251", $dbusername, $dbpassword);