PHP use cookies to set the user 30 minutes without the operation of the automatic Exit Function instance detailed

This article mainly introduces PHP to use cookies to set the user 30 minutes without the operation of automatic exit function, the need for friends can refer to the following

Login controller need to do the login successfully put the user ID and other information stored in the cookie:

$this->systemsetkey (' name ' = ' + $admin _info[' admin_name '), ' id ' = = $admin _info[' admin_id '], ' gid ' =>$ admin_info[' Admin_gid '), ' sp ' = $admin _info[' admin_is_super ']);//Do something after the landing

The Systemsetkey method in the parent class:

/**   * System background Member Login to write the member verification content to the corresponding cookie   *   * @param string $name user name   * @param int $id User ID   * @return bool Cloth The return result of the type   */  protected final function Systemsetkey ($user) {    Setnccookie (' Sys_key ', Encrypt (serialize ($ User), Md5_key), 3600, ", null);//Set cookie expiration time is 30 minutes. This way set the cookie framework with its own encryption rules, specifically whether you need to encrypt yourself to look at the settings.  }

The parent class controller constructs the method to determine whether the user has logged in:

protected function construct () {language::read (' common,layout '); /** * Verify that the user is logged in * $admin _info Administrator profile Name ID */$this->admin_info = $this->systemlogin ();//obtain information of the administrator, after the    Subclass Controller Inheritance Constructor method if ($this->admin_info[' id ']! = 1) {//Verify Permissions $this->checkpermission (); }//transcoding prevents GBK from using AJAX calls simultaneous Kanji data garbled if (($_get[' branch ']!= ' | | $_get[' OP ']== ' Ajax ') && strtoupper (CHARSET) = = ' G    BK ') {$_get = LANGUAGE::GETGBK ($_get); }}/** * System background Login Verification * * @param * @return return result of array type */protected final function Systemlogin () {//Get COO Kie content, decryption, and system matching $user = Unserialize (Decrypt (Cookie (' Sys_key '), Md5_key), or//take cookie stored information, now use the framework to customize the cookie encryption method I F (!key_exists (' gid ', (array) $user) | |!isset ($user [' SP ']) | | (Empty ($user [' name ']) | | empty ($user [' ID ']))    {//If there is no indication that the user has not logged in or the user has not manipulated the cookie for a long time expires skip to the landing page to @header (' Location:index.php?mod=login&action=login '); exit; }else {$this->systemsetkey ($user);//If the user has logged in, each operation will overwrite the Refresh CoOkie;} return $user; }

Cryptographic functions:

/** * Cryptographic Functions * * @param string $txt strings that need to be encrypted * @param string $key key * @return String returns the encryption result */function encrypt ($txt, $key =  ") {if (empty ($txt)) return $txt;  if (empty ($key)) $key = MD5 (Md5_key);  $chars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789-_.";  $ikey = "-X6G6ZWM2G9G_VR0BO.POQ3KRIXSZ6RM";  $NH 1 = rand (0,64);  $NH 2 = rand (0,64);  $NH 3 = rand (0,64);  $ch 1 = $chars {$nh 1};  $ch 2 = $chars {$nh 2};  $ch 3 = $chars {$NH 3};  $nhnum = $nh 1 + $nh 2 + $nh 3;  $knum = 0; $i = 0;  while (Isset ($key {$i})) $knum +=ord ($key {$i + +});  $mdKey = SUBSTR (MD5 (MD5 (MD5 ($key. $ch 1). $ch 2. $ikey). $ch 3), $nhnum%8, $knum%8 + 16); $txt = Base64_encode (Time ().  _ '. $txt);  $txt = str_replace (Array (' + ', '/', ' = '), array ('-', ' _ ', '. '), $txt);  $tmp = ";  $j =0; $k = 0;  $tlen = strlen ($txt);  $klen = strlen ($mdKey);    for ($i =0; $i < $tlen; $i + +) {$k = $k = = $klen? 0: $k;    $j = ($nhnum +strpos ($chars, $txt {$i}) +ord ($mdKey {$k + +}))%64;  $tmp. = $chars {$j};  } $tmplen = strlen ($tmp); $tmp = Substr_rePlace ($tmp, $ch 3, $NH 2 + + $tmplen, 0);  $tmp = Substr_replace ($tmp, $ch 2, $nh 1 + + $tmplen, 0);  $tmp = Substr_replace ($tmp, $ch 1, $knum% + + $tmplen, 0); return $tmp;}

Decryption function:

/** * Decryption Function * * @param string $txt strings to be decrypted * @param string $key key * @return The returned result of string string type */function decrypt ($txt, $k  EY = ", $ttl = 0) {if (empty ($txt)) return $txt;  if (empty ($key)) $key = MD5 (Md5_key);  $chars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789-_.";  $ikey = "-X6G6ZWM2G9G_VR0BO.POQ3KRIXSZ6RM";  $knum = 0; $i = 0;  $tlen = @strlen ($txt);  while (Isset ($key {$i})) $knum +=ord ($key {$i + +});  $ch 1 = @ $txt {$knum% $tlen};  $nh 1 = Strpos ($chars, $ch 1);  $txt = @substr_replace ($txt, ", $knum% $tlen--, 1);  $ch 2 = @ $txt {$nh 1 $tlen};  $nh 2 = @strpos ($chars, $ch 2);  $txt = @substr_replace ($txt, ", $nh 1 $tlen--, 1);  $ch 3 = @ $txt {$nh 2 $tlen};  $nh 3 = @strpos ($chars, $ch 3);  $txt = @substr_replace ($txt, ", $nh 2 $tlen--, 1);  $nhnum = $nh 1 + $nh 2 + $nh 3;  $mdKey = SUBSTR (MD5 (MD5 (MD5 ($key. $ch 1). $ch 2. $ikey). $ch 3), $nhnum% 8, $knum% 8 + 16);  $tmp = "; $j = 0;  $k = 0;  $tlen = @strlen ($txt);  $klen = @strlen ($mdKey); for ($i =0; $i < $tlen; $i + +) {$k = $k = = $kLen?    0: $k;    $j = Strpos ($chars, $txt {$i})-$nhnum-ord ($mdKey {$k + +});    while ($j <0) $j +=64;  $tmp. = $chars {$j};  } $tmp = Str_replace (Array ('-', ' _ ', '. '), Array (' + ', '/', ' = '), $tmp);  $tmp = Trim (Base64_decode ($tmp));      if (Preg_match ("/\d{10}_/s", substr ($tmp, 0,11))) {if ($ttl > 0 && (Time ()-substr ($tmp, 0,11) > $ttl)) {    $tmp = null;    }else{$tmp = substr ($tmp, 11); }} return $tmp;}