mysql - How to use username which is used to login, in all the php files -


i have login page data getting stored in database table name "users". want use inputuser "users" have stored shown on php files have created , connected same database.

i want use value of "users" have used login database, can know logged in. pasting login page , 1 php page example.

login.php

   <?php  $inputuser = $_post["user"]; $inputpass = $_post["pass"];  $user = "root"; $password = ""; $database = "abcd";  $connect = mysql_connect("localhost", $user, $password);   // variable initializes connection database @mysql_select_db($database) or die("database not found");  $query = "select * `users` `user` = '$inputuser'"; $querypass = "select * `users` `pass` = '$inputpass'";  echo $password;  $result = mysql_query($query) or die(mysql_error()); $resultpass = mysql_query($querypass) or die( mysql_error());  $row = mysql_fetch_array($result); $rowpass = mysql_fetch_array($resultpass);  $serveruser = $row["user"]; $serverpass = $rowpass["pass"];   if ($serveruser && $serverpass){  if(!$result){     //header('location: fail.html');     die("username name or password invalid"); }  echo "<br><center>database output</b> </center><br><br> "; mysql_close();  echo $inputpass; echo $serverpass;  if($inputpass == $serverpass){     header('location: home.php'); }  }else {         header('location: fail.html');         echo "sorry, bad login"; }   ?>

sample.php

<?php  $taken = "false"; $database = "abcd"; $password = ""; $username = "root";  // connect database $con = mysql_connect('localhost', $username, $password) or die("unable connect database"); @mysql_select_db($database, $con) or die("unable connect");   $paper_title =  mysql_real_escape_string($_get['id']);  $query = "select * paper ptitle = '$paper_title'";  $result = mysql_query($query); $row = mysql_fetch_array($result); mysql_close(); ?> <div align = "center"> <form method="post" action="updatedata.php" />   <table>   <tr> <td>title: </td>  <td><input type="text" name="ptitle" value="<?php echo "$row[ptitle]" ?>">          </td> </tr>        </table>  <input type ="submit" value ="update information">  </form> </div> 

    <?php      $inputuser = $_post["user"];     $inputpass = $_post["pass"];      $user = "root";     $password = "";     $database = "abcd";      $connect = mysql_connect("localhost", $user, $password);   // variable initializes connection database     @mysql_select_db($database) or die("database not found");      $query = "select * `users` `user` = '$inputuser'";     $querypass = "select * `users` `pass` = '$inputpass'";      echo $password;      $result = mysql_query($query) or die(mysql_error());     $resultpass = mysql_query($querypass) or die( mysql_error());      $row = mysql_fetch_array($result);     $rowpass = mysql_fetch_array($resultpass);      $serveruser = $row["user"];     $serverpass = $rowpass["pass"];       if ($serveruser && $serverpass){      if(!$result){         //header('location: fail.html');         die("username name or password invalid");     }      echo "<br><center>database output</b> </center><br><br> ";     mysql_close();      echo $inputpass;     echo $serverpass;      if($inputpass == $serverpass){           session_start();           $_session["user"] = $row["user"];           header('location: home.php');     }      }else {             header('location: fail.html');             echo "sorry, bad login";     } ?>

// , you'll may use in pages. when logout, close session.

attention: change mysql_ mysqli_


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