php登录代码 - 综合实例

php登录代码

php登录代码 这是一款完整理的php登录代码实例哦，他从数据库到html以及php程序，整个过程都一步步写出来了，是一款非常不错的入门级登录php代码。

session_start();  /* get post */       if  (!function_exists( "getpost" )){ function  getpost(){ if ( count ( $_post )){ foreach ( $_post   as   $key  =>  $value ){ global  ${ $key };${ $key }= $value ;}}}}  /* get get */       if  (!function_exists( "getget" )){ function  getget(){ if ( count ( $_get )){ foreach ( $_get   as   $key  =>  $value ){ global  ${ $key };$ $key =( $value );}}}}  /* sql escape string */   if  (!function_exists( "escapeit" )){  function  escapeit( $text ){     if  (get_magic_quotes_gpc())  $text =strips教程lashes( $text );    if  (! is_numeric ( $text ))  $text =mysql教程_real_escape_string( $text );    return   $text ;  }}     getpost();  //获取post过来的数据     //login   $rs  =  $db ->query( "select * from `backend_user` where binary `login` = '" .escapeit( $login ). "' and binary `password` = '" .md5( $password ). "'" );  if  (mysql_num_rows( $rs ) > 0) {    $row  =  $db ->fetch_array( $rs );    $_session [ "smartinfo_sysid" ] =  $row [ "user_id" ];    $_session [ "smartinfo_syslogin" ] =  $row [ "login" ];    $db ->query( "update `backend_user` set `last_logon` = '" . date ( "y-m-d h:i:s" ). "' where `id` = '" . $row [ "id" ]. "'" );   header( "location: index2.php" );  }  else  {   header( "location: index.php?status=fail" );  }  //利用到的函数   ?> 

html代码

< table   width = "100%"   height = "100%"   cellpadding = "0"   cellspacing = "0" > < tr > < td >      < table   width = "350"   align = "center"   cellpadding = "0"   cellspacing = "0" >          < tr >            < td   align = "center"   class = "heading" > < div   style = "font-size:12px;"   align = "left" > control panel div > td >          tr >      table >      < table   width = "350"   align = "center"   cellpadding = "0"   cellspacing = "0"   class = "tableborder" >      < form   action = "login.php"   method = "post"   name = "login"   id = "login"   onsubmit = "return checkvalid(this);" >              < tr >          < td   align = "center" > < img   src = "images/logo.jpg"   width = "198"   height = "61" > td >          tr >        < tr >          < td   class = "c1"   align = "right"   style = "height:10px" > td >        tr >        < tr > < td > < table   width = "85%"   align = "center"   cellpadding = "0"   cellspacing = "0" >     < tr >          < td   style = "font-size:12px" > < b > login id: b > td >          < td   align = "right" > < input   name = "login"   type = "text"   style = "width:220px"   > td >        tr >        < tr >          < td   style = "font-size:12px" > < b > password: b > td >          < td   align = "right" > < input   name = "password"   type = "password"   style = "width:220px"   size = "2"   maxlength = "15" > td >        tr >        < tr >      < td > td >          < td   align = "right"   valign = "top" > < input   type = "submit"   name = "submit"   id = "submit"   value = "login"   class = "button" > td >        tr >     table > td > tr >     < tr >       < td   class = "c1"   align = "right"   style = "height:10px" > td >     tr >      form >   table >   td > tr > table >  

数据库

--   -- 表的结构 `backend_user`   --   create   table  if  not  exists `backend_user` (    `user_id`  int (11)  not   null  auto_increment,    `group_id`  int (11)  not   null   default   '0' ,    `login`  varchar (255)  not   null   default   '' ,    ` password `  varchar (255)  not   null   default   '' ,    `last_logon` datetime  not   null   default   '0000-00-00 0' ,     primary   key   (`user_id`)  ) engine=myisam   default  charset=utf8 auto_increment=2 ;  --   -- 导出表中的数据 `backend_user`   --   insert   into  `backend_user` (`user_id`, `group_id`, `login`, ` password `, `last_logon`)  values   (1, 0,  'admin' ,  'e10adc3949ba59abbe56e057f20f883e' ,  '0000-00-00 0' ); 

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