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Example of php using mysql database to store session

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2016-07-25 09:07:381055browse
  2. CREATE TABLE `db_session` (
  3. `sesskey` char(32) NOT NULL,
  4. `expiry` int(11) unsigned NOT NULL,
  5. `value` text NOT NULL,
  6. PRIMARY KEY (`sesskey`)
  7. ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
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Database shows: db_session Column names: sesskey, expiry, value Where: sesskey is the primary key. Value stores the value in the session.

3. Create session_mysql.php file. This file is used to construct a method to save the session. Just modify the parameters and use it directly. session_mysql.php php code:

  2. $gb_DBname="db_myBBS";//Database name
  3. $gb_DBuser="root";//Database user name
  4. $gb_DBpass="23928484";//Database password
  5. $gb_DBHOSTname ="localhost";//The name or IP address of the host
  6. $SESS_DBH="";
  7. $SESS_LIFE=get_cfg_var("session.gc_maxlifetime");//Get the maximum validity period of the session.
  8. function sess_open($save_path,$session_name){
  9. global $gb_DBHOSTname,$gb_DBname,$gb_DBuser,$gb_DBpass,$SESS_DBH;
  10. if(!$SESS_DBH=mysql_pconnect($gb_DBHOSTname,$gb_DBuser,$gb_DBpass)){
  11. echo "
  12. MySql Error:".mysql_error()."
  13. ";
  14. die();
  15. }
  16. if(!mysql_select_db($gb_DBname,$SESS_DBH)){
  17. echo "
  18. MySql Error: ".mysql_error()."
  19. ";
  20. die();
  21. }
  22. return true;
  23. }
  24. function sess_close(){
  25. return true;
  26. }
  27. function sess_read($key){
  28. global $SESS_DBH,$SESS_LIFE;
  29. $qry="select value from db_session where sesskey = '$key' and expiry > ".time();
  30. $qid=mysql_query($qry,$SESS_DBH);
  31. if(list( $value)=mysql_fetch_row($qid)){
  32. return $value;
  33. }
  34. return false;
  35. }
  36. function sess_write($key,$val){
  37. global $SESS_DBH,$SESS_LIFE;
  38. $expiry=time() +$SESS_LIFE;
  39. $value=$val;
  40. $qry="insert into db_session values('$key',$expiry,'$value')";
  41. $qid=mysql_query($qry,$SESS_DBH);
  42. if(!$qid){
  43. $qry="update db_session set expiry=$expiry, value='$value' where sesskey='$key' and expiry >".time();
  44. $qid=mysql_query($ qry,$SESS_DBH);
  45. }
  46. return $qid;
  47. }
  48. function sess_destroy($key){
  49. global $SESS_DBH;
  50. $qry="delete from db_session where sesskey = '$key'";
  51. $qid=mysql_query ($qry,$SESS_DBH);
  52. return $qid;
  53. }
  54. function sess_gc($maxlifetime){
  55. global $SESS_DBH;
  56. $qry="delete from db_session where expiry < ".time();
  57. $qid= mysql_query($qry,$SESS_DBH);
  58. return mysql_affected_rows($SESS_DBH);
  59. }
  60. session_module_name();
  61. session_set_save_handler("sess_open","sess_close","sess_read","sess_write","sess_destroy","sess_g c" );
  62. ?>
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4. Create a test file. The session_mysql.php file just created must be referenced before use. File: session_test.php

  2. include ("session_mysql.php");
  3. session_start();
  4. $_SESSION['abc']= "A: I will be back!";
  5. $_SESSION['meto ']= "B: Me too ";
  6. $_SESSION['name']= "louis ";
  7. echo "click me";
  8. ?>
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File: get_session_test.php

  2. include ("session_mysql.php");
  3. session_start();
  4. echo $_SESSION['abc'];
  5. echo "
    ";
  6. echo $_SESSION[' meto'];
  7. echo "
    ";
  8. echo $_SESSION['name'];
  9. $_SESSION['wq']="12e";
  10. echo "
    click again";
  11. ?>
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File: get_session_test2.php

  2. include ("session_mysql.php");
  3. session_start();
  4. echo $_SESSION['abc'];
  5. echo "
    ";
  6. echo $_SESSION[' meto'];
  7. echo "
    ";
  8. echo $_SESSION['name'];
  9. echo "
    ";
  10. echo $_SESSION['wq'];
  11. //session_destroy();/ /Function used to destroy all sessions.
  12. ?>
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