PHP / MySQL中的custom / DB会话-在其他页面中显示ERROR

问题描述

|| 我写了这个自定义的会话处理程序！ 请看一下[并查看下面的粗体错误文本，以帮助我找出错误的出处]

<?PHP
 function sess_open($sess_path,$sess_name) {
   return true;
 }

 function sess_close() {
   return true;
 }

  function sess_read($sess_id) 
{
 $con = MysqLi_connect(\"localhost\",\"root\",\"\",\"database\");
 $stmt = MysqLi_prepare($con,\"SELECT Data FROM sessions WHERE SessionID = ?\");
 MysqLi_stmt_bind_param($stmt,\"s\",$sess_id);
 MysqLi_stmt_execute($stmt);
 MysqLi_stmt_bind_result($stmt,$data);
 MysqLi_stmt_fetch($stmt);
 if (is_null($data))
 {
 $CurrentTime = time();
 MysqLi_stmt_close($stmt);
 $stmt = MysqLi_prepare($con,\"INSERT INTO sessions (SessionID,Datetouched) VALUES (?,?)\");
 MysqLi_stmt_bind_param($stmt,\"ss\",$sess_id,$CurrentTime);
 MysqLi_stmt_execute($stmt);
 return \'\';
 }
 else
 {
 MysqLi_stmt_close($stmt);
 $stmt = MysqLi_prepare($con,\"UPDATE sessions SET Datetouched = ? WHERE SessionID = ?\");
 MysqLi_stmt_bind_param($stmt,$CurrentTime,$sess_id);
 MysqLi_stmt_execute($stmt);
 return $sess_id;
 }
}

function sess_write($sess_id,$data) 
{
 $con = MysqLi_connect(\"localhost\",\"database\");
 $CurrentTime = time();
 $stmt = MysqLi_prepare($con,\"UPDATE sessions SET Data = ?,Datetouched=? WHERE SessionID=?\");
 MysqLi_stmt_bind_param($stmt,\"sss\",$data,$sess_id);
 MysqLi_stmt_execute($stmt);
 return true;
}

function sess_destroy($sess_id) 
{
 $con = MysqLi_connect(\"localhost\",\"DELETE FROM sessions WHERE SessionID = ?\");
 MysqLi_stmt_bind_param($stmt,$sess_id);
 MysqLi_stmt_execute($stmt);
 return true;
}

function sess_gc($sess_maxlifetime) 
{
 $CurrentTime = time();
 MysqLi_query($con,\"DELETE FROM sessions WHERE Datetouched + $sess_maxlifetime < $CurrentTime;\");
 return true;
}

session_set_save_handler(\"sess_open\",\"sess_close\",\"sess_read\",\"sess_write\",\"sess_destroy\",\"sess_gc\");
session_start();
?>

这是[在上方]我的DB_Session.PHP文件   包括\'DB_Session.PHP \';   $ _SESSION [\'foo \'] = \“ BAR \”;   $ _SESSION [\'bar \'] = \“ FOO \”;   回声$ _SESSION [\'foo \']。 \'\'。$ _ SESSION [\'bar \']; 这是[在上面]我的session_start.PHP文件，它可以正常工作:)   包括\'DB_Session.PHP \';   echo $ _SESSION [\'foo \']。\'\'。$ _ SESSION [\'bar \'];   session_destroy（）;   echo $ _SESSION [\'foo \']。\'\'。$ _ SESSION [\'bar \']; 这是[在上面]我的session_finish.PHP文件，显示错误:( 尽管会话被完全破坏了，但是却给出了这个错误！ 注意：未定义的索引：第4行的session_finish.PHP中的foo 注意：未定义的索引：第4行的session_finish.PHP中的bar 注意：未定义的索引：第6行的session_finish.PHP中的foo 注意：未定义的索引：第6行的session_finish.PHP中的bar 表结构   如果不存在

sessions

，则创建表（   

ID

int（11）NOT NULL AUTO_INCREMENT，   

SessionID

char（26）DEFAULT NULL，   

Data

文字，   

Datetouched

int（11）DEFAULT NULL，   主键（

ID

）   ）ENGINE = InnoDB DEFAULT CHARSET = latin1 AUTO_INCREMENT = 1; 浏览session_start.PHP之后，我可以看到该值已存储在数据库中，并且浏览session_finish.PHP之后，该值已被完美删除，但是在销毁之前无法在其他页面中显示SESSION数据！     

解决方法

session_finish.php文件在哪里？ 但很可能您必须在使用变量之前定义变量（foo，baz） 确保该变量已定义，因此该通知不会出现     ,DB_Session.php有问题！绝对是 当我使用自定义处理程序

session_set_save_handler(...)

删除行时，该行有效，但对该行却无效。所以问题出在您的函数中，但是我仍然找不到哪里？ DB_Session.php

<?php

 function sess_open($save_path,$session_name) {
   // my code
   global $sess_save_path;
   $sess_save_path = $save_path;
   return true;
   }

 function sess_close() {
   return true;
   }

 function sess_read($sess_id) {
   $con = mysqli_connect(\"localhost\",\"root\",\"\",\"database\");
   $stmt = mysqli_prepare($con,\"SELECT Data FROM sessions WHERE SessionID = ?\");
   mysqli_stmt_bind_param($stmt,\"s\",$sess_id);
   mysqli_stmt_execute($stmt);
   mysqli_stmt_bind_result($stmt,$data);
   mysqli_stmt_fetch($stmt);
   if (is_null($data)) {
     $CurrentTime = time();
     mysqli_stmt_close($stmt);
     $stmt = mysqli_prepare($con,\"INSERT INTO sessions (SessionID,DateTouched) VALUES (?,?)\");
     mysqli_stmt_bind_param($stmt,\"ss\",$sess_id,$CurrentTime);
     mysqli_stmt_execute($stmt);
     }
   else {
     mysqli_stmt_close($stmt);
     $stmt = mysqli_prepare($con,\"UPDATE sessions SET DateTouched = ? WHERE SessionID = ?\");
     mysqli_stmt_bind_param($stmt,$CurrentTime,$sess_id);
     mysqli_stmt_execute($stmt);
     }
   // my code
   global $sess_save_path;
   $sess_file = \"$sess_save_path/sess_\" . $sess_id;
   return (string) @file_get_contents($sess_file);
   }

 function sess_write($sess_id,$data) {
   $con = mysqli_connect(\"localhost\",\"database\");
   $CurrentTime = time();
   $stmt = mysqli_prepare($con,\"UPDATE sessions SET Data = ?,DateTouched=? WHERE SessionID=?\");
   mysqli_stmt_bind_param($stmt,\"sss\",$data,$sess_id);
   mysqli_stmt_execute($stmt);
   // my code
   global $sess_save_path;
   $sess_file = \"$sess_save_path/sess_\" . $sess_id;
   if ($fp = @fopen($sess_file,\"w\")) {
     $return = fwrite($fp,$data);
     fclose($fp);
     return $return;
     }
   else return false;
   }

 function sess_destroy($sess_id) {
   $con = mysqli_connect(\"localhost\",\"DELETE FROM sessions WHERE SessionID = ?\");
   mysqli_stmt_bind_param($stmt,$sess_id);
   mysqli_stmt_execute($stmt);
   // my code
   global $sess_save_path;
   $sess_file = \"$sess_save_path/sess_\" . $sess_id;
   return(@unlink($sess_file));
   }

 function sess_gc($sess_maxlifetime) {
   $CurrentTime = time();
   mysqli_query($con,\"DELETE FROM sessions WHERE DateTouched + $sess_maxlifetime < $CurrentTime;\");
   // my code
   global $sess_save_path;
   foreach (glob(\"$sess_save_path/sess_*\") as $filename) {
     if (filemtime($filename) + $sess_maxlifetime < time()) {
       @unlink($filename);
       }
     }
   return true;
   }

  session_set_save_handler(\"sess_open\",\"sess_close\",\"sess_read\",\"sess_write\",\"sess_destroy\",\"sess_gc\");
  session_start();

?>

尝试用此脚本替换您的脚本，并让mi知道那里发生了什么？ session_start.php的现场演示 session_finish.php的现场演示 所有3个脚本的下载链接（session.zip）。     ,

function sess_read($sess_id) 
{
 $con = mysqli_connect(\"localhost\",\"database\");
 $stmt = mysqli_prepare($con,\"SELECT Data FROM sessions WHERE SessionID = ?\");
 mysqli_stmt_bind_param($stmt,$sess_id);
 mysqli_stmt_execute($stmt);
 mysqli_stmt_bind_result($stmt,$data);
 mysqli_stmt_fetch($stmt);
 if (is_null($data))
 {
 $CurrentTime = time();
 mysqli_stmt_close($stmt);
 $stmt = mysqli_prepare($con,?)\");
 mysqli_stmt_bind_param($stmt,$CurrentTime);
 mysqli_stmt_execute($stmt);
 return \'\';
 }
 else
 {
 mysqli_stmt_close($stmt);
 $stmt = mysqli_prepare($con,\"UPDATE sessions SET DateTouched = ? WHERE SessionID = ?\");
 mysqli_stmt_bind_param($stmt,$sess_id);
 mysqli_stmt_execute($stmt);
 return $data;    /*  $sess_id; THIS WAS CREATING PROBLEM :X */
 }
}

发现会话时错误是重现数据！