header.php

<?php
session_start();
if ($_GET["logout"] == "yes"){
        unset($_SESSION["kod_sotrudnika"]);
    }

 ?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 <html>
    <head>
        <meta charset="UTF8">
    </head>
    <body bgcolor="turquoise" link="#00FF00" alink="#43FF00" vlink="#0033FF" background="141.jpg" style="
    background-color: rgb(64, 224, 208);
    background-image: (D:\home\diplom\www\Biogaz.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    ">
    <a href = "/main.php?logout=yes"> Выйти </a>
    <?

    mysql_connect("127.0.0.1", "root") or die;
    mysql_select_db("Diplom");
    if (!mysql_select_db("Diplom"))
    {
        mysql_error();
    }
    mysql_query("SET NAMES UTF8");


    if ($_SERVER["REQUEST_METHOD"] == "POST" && isset($_POST["login"] )){
        $sqltext = "SELECT * FROM sotrudniki WHERE login='".$_POST["login"]."' AND parol='".$_POST["password"]."'";
        $rs=mysql_query($sqltext);
        echo $sqltext;
        if (!mysql_query($sqltext))
        {
            mysql_error();
        }
        if (mysql_num_rows($rs)){
            $ar = mysql_fetch_array($rs);
            $_SESSION["kod_sotrudnika"] = $ar["kod_sotrudnika"];
        }else
            $_SESSION["kod_sotrudnika"] = "";
    }

    if (!$_SESSION["kod_sotrudnika"]){
        echo '<form method="POST">
            <input type="edit" name="login"/><br/>
            <input type="password" name="password"/><br/>
            <input type="submit" value="sent"/><br/>
        </form>';
        exit();
    }
    else
        echo 'You authorized as: '.$_SESSION["kod_sotrudnika"];
     //error_reporting(-1);
     Error_Reporting(E_ALL & ~E_NOTICE);
?>