PHP zen_rand函数代码示例

function zen_create_random_value($length, $type = 'mixed')
{
    if ($type != 'mixed' && $type != 'chars' && $type != 'digits') {
        return false;
    }
    $rand_value = '';
    while (strlen($rand_value) < $length) {
        if ($type == 'digits') {
            $char = zen_rand(0, 9);
        } else {
            $char = chr(zen_rand(0, 255));
        }
        if ($type == 'mixed') {
            if (eregi('^[a-z0-9]$', $char)) {
                $rand_value .= $char;
            }
        } elseif ($type == 'chars') {
            if (eregi('^[a-z]$', $char)) {
                $rand_value .= $char;
            }
        } elseif ($type == 'digits') {
            if (ereg('^[0-9]$', $char)) {
                $rand_value .= $char;
            }
        }
    }
    return $rand_value;
}

function zen_create_random_value($length, $type = 'mixed')
{
    if ($type != 'mixed' && $type != 'chars' && $type != 'digits') {
        return false;
    }
    $rand_value = '';
    while (strlen($rand_value) < $length) {
        if ($type == 'digits') {
            $char = zen_rand(0, 9);
        } else {
            $char = chr(zen_rand(0, 255));
        }
        if ($type == 'mixed') {
            if (preg_match('/^[a-z0-9]$/i', $char)) {
                $rand_value .= $char;
            }
        } elseif ($type == 'chars') {
            if (preg_match('/^[a-z]$/i', $char)) {
                $rand_value .= $char;
            }
        } elseif ($type == 'digits') {
            if (preg_match('/^[0-9]$/', $char)) {
                $rand_value .= $char;
            }
        }
    }
    if ($type == 'mixed' && !preg_match('/^(?=.*[\\w]+.*)(?=.*[\\d]+.*)[\\d\\w]{' . $length . ',}$/', $rand_value)) {
        $rand_value .= zen_rand(0, 9);
    }
    return $rand_value;
}

function zen_encrypt_password($plain)
{
    $password = '';
    for ($i = 0; $i < 10; $i++) {
        $password .= zen_rand();
    }
    $salt = substr(md5($password), 0, 2);
    $password = md5($salt . $plain) . ':' . $salt;
    return $password;
}

function zen_random_name()
{
    $letters = 'abcdefghijklmnopqrstuvwxyz';
    $dirname = '.';
    $length = floor(zen_rand(16, 20));
    for ($i = 1; $i <= $length; $i++) {
        $q = floor(zen_rand(1, 26));
        $dirname .= $letters[$q];
    }
    return $dirname;
}

function zen_random_charcode($length)
{
    $arraysize = 34;
    $chars = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '1', '2', '3', '4', '5', '6', '7', '8', '9');
    $code = '';
    for ($i = 1; $i <= $length; $i++) {
        $j = floor(zen_rand(0, $arraysize));
        $code .= $chars[$j];
    }
    return $code;
}

function zen_random_name()
{
    $letters = 'abcdefghijklmnopqrstuvwxyz';
    $dirname = '.';
    if (defined('DOWNLOADS_SKIP_DOT_PREFIX_ON_REDIRECT') && DOWNLOADS_SKIP_DOT_PREFIX_ON_REDIRECT === TRUE) {
        $dirname = '';
    }
    $length = floor(zen_rand(16, 20));
    for ($i = 1; $i <= $length; $i++) {
        $q = floor(zen_rand(1, 26));
        $dirname .= $letters[$q];
    }
    return $dirname;
}

 function ExecuteRandom($zf_sql, $zf_limit = 0, $zf_cache = false, $zf_cachetime = 0)
 {
     //    if ($zf_limit) {
     //      $zf_sql = $zf_sql . ' LIMIT ' . $zf_limit;
     //    }
     //echo $zf_sql . '<br />';
     $time_start = explode(' ', microtime());
     $obj = new queryFactoryResult();
     $obj->result = array();
     if (!$this->db_connected) {
         $this->set_error('0', DB_ERROR_NOT_CONNECTED);
     }
     $zp_db_resource = @pg_query($this->link, $zf_sql);
     if (!$zp_db_resource) {
         $this->set_error(pg_last_error());
     }
     $obj->resource = $zp_db_resource;
     $obj->cursor = 0;
     $obj->Limit = $zf_limit;
     if ($obj->RecordCount() > 0) {
         $obj->EOF = false;
         $zp_Start_row = 0;
         if ($zf_limit) {
             $zp_start_row = zen_rand(0, $obj->RecordCount() - $zf_limit);
         }
         $obj->Move($zp_start_row);
         $obj->Limit = $zf_limit;
         $zp_ii = 0;
         while (!$obj->EOF) {
             $zp_result_array = @pg_fetch_array($zp_db_resource, NULL, PGSQL_ASSOC);
             if ($zp_ii == $zf_limit) {
                 $obj->EOF = true;
             }
             if ($zp_result_array) {
                 while (list($key, $value) = each($zp_result_array)) {
                     if (!ereg('^[0-9]', $key)) {
                         //              echo $key . '=' . $value . '<br />';
                         $obj->result[$zp_ii][$key] = $value;
                     }
                 }
             } else {
                 $obj->Limit = $zp_ii;
                 $obj->EOF = true;
             }
             $zp_ii++;
         }
         $obj->result_random = array_rand($obj->result, sizeof($obj->result));
         //      echo sizeof($obj->result) . " result array ";
         //      print_r($obj->result);
         //      echo '<br /><br />';
         //      echo 'random array ';
         //      print_r($obj);
         if (is_array($obj->result_random)) {
             $zp_ptr = $obj->result_random[$obj->cursor];
         } else {
             $zp_ptr = $obj->result_random;
         }
         while (list($key, $value) = each($obj->result[$zp_ptr])) {
             if (!ereg('^[0-9]', $key)) {
                 $obj->fields[$key] = $value;
             }
         }
         $obj->EOF = false;
     } else {
         $obj->EOF = true;
     }
     $time_end = explode(' ', microtime());
     $query_time = $time_end[1] + $time_end[0] - $time_start[1] - $time_start[0];
     $this->total_query_time += $query_time;
     $this->count_queries++;
     return $obj;
 }

function zen_random_select($query)
{
    global $db;
    $random_product = '';
    $random_query = $db->Execute($query);
    $num_rows = $random_query->RecordCount();
    if ($num_rows > 1) {
        $random_row = zen_rand(0, $num_rows - 1);
        $random_query->Move($random_row);
    }
    return $random_query;
}

 function ExecuteRandomMulti($zf_sql, $zf_limit = 0, $zf_cache = false, $zf_cachetime = 0)
 {
     $this->zf_sql = $zf_sql;
     $time_start = explode(' ', microtime());
     $obj = new queryFactoryResult();
     $obj->result = array();
     if (!$this->db_connected) {
         if (!$this->connect($this->host, $this->user, $this->password, $this->database, $this->pConnect, $this->real)) {
             $this->set_error('0', DB_ERROR_NOT_CONNECTED);
         }
     }
     $zp_db_resource = @mysql_query($zf_sql, $this->link);
     if (!$zp_db_resource) {
         $this->set_error(mysql_errno(), mysql_error());
     }
     if (!is_resource($zp_db_resource)) {
         $obj = null;
         return true;
     }
     $obj->resource = $zp_db_resource;
     $obj->cursor = 0;
     $obj->Limit = $zf_limit;
     if ($obj->RecordCount() > 0 && $zf_limit > 0) {
         $obj->EOF = false;
         $zp_Start_row = 0;
         if ($zf_limit) {
             $zp_start_row = zen_rand(0, $obj->RecordCount() - $zf_limit);
         }
         $obj->Move($zp_start_row);
         $obj->Limit = $zf_limit;
         $zp_ii = 0;
         while (!$obj->EOF) {
             $zp_result_array = @mysql_fetch_array($zp_db_resource);
             if ($zp_ii == $zf_limit) {
                 $obj->EOF = true;
             }
             if ($zp_result_array) {
                 while (list($key, $value) = each($zp_result_array)) {
                     $obj->result[$zp_ii][$key] = $value;
                 }
             } else {
                 $obj->Limit = $zp_ii;
                 $obj->EOF = true;
             }
             $zp_ii++;
         }
         $obj->result_random = array_rand($obj->result, sizeof($obj->result));
         if (is_array($obj->result_random)) {
             $zp_ptr = $obj->result_random[$obj->cursor];
         } else {
             $zp_ptr = $obj->result_random;
         }
         while (list($key, $value) = each($obj->result[$zp_ptr])) {
             if (!preg_match('/^[0-9]/', $key)) {
                 $obj->fields[$key] = $value;
             }
         }
         $obj->EOF = false;
     } else {
         $obj->EOF = true;
     }
     $time_end = explode(' ', microtime());
     $query_time = $time_end[1] + $time_end[0] - $time_start[1] - $time_start[0];
     $this->total_query_time += $query_time;
     $this->count_queries++;
     return $obj;
 }

function session_start()
{
    global $session, $SID, $_COOKIE, $_GET, $_POST;
    // Define the global variable $SID?
    $define_sid = true;
    // Send the session cookie?
    $send_cookie = true;
    // Is track_vars enabled?
    $track_vars = isset($_COOKIE) || isset($_GET) || isset($_POST) ? true : false;
    // Check if session_start() has been called once already
    if ($session->nr_open_sessions != 0) {
        return false;
    }
    // If our only resource is the global symbol_table, then check it.
    // If track_vars are enabled, we prefer these, because they are more
    // reliable, and we always know whether the user has accepted the
    // cookie.
    if (isset($GLOBALS[$session->name]) && !empty($GLOBALS[$session->name]) && !$track_vars) {
        $session->id = $GLOBALS[$session->name];
        $send_cookie = false;
    }
    // Now check the track_vars. Cookies are preferred, because initially
    // cookie and get variables will be available.
    if (empty($session->id) && $track_vars) {
        if (isset($_COOKIE[$session->name])) {
            $session->id = $_COOKIE[$session->name];
            $define_sid = false;
            $send_cookie = false;
        }
        if (isset($_GET[$session->name])) {
            $session->id = $_GET[$session->name];
        }
        if (isset($_POST[$session->name])) {
            $session->id = $_POST[$session->name];
        }
    }
    /*
    // Check the REQUEST_URI symbol for a string of the form
    // '<session-name>=<session-id>' to allow URLs of the form
    // http://yoursite/<session-name>=<session-id>/script.php 
        if (empty($session->id)) {
          eregi($session->name . '=([^/]+)', $GLOBALS['REQUEST_URI'], $regs);
          $regs[1] = trim($regs[1]);
          if (!empty($regs[1])) {
            $session->id = $regs[1];
          }
        }
    */
    // Check whether the current request was referred to by
    // an external site which invalidates the previously found ID
    if (!empty($session->id) && $session->referer_check) {
        $url = parse_url($GLOBALS['HTTP_REFERER']);
        if (trim($url['host']) != $GLOBALS['SERVER_NAME']) {
            unset($session->id);
            $send_cookie = true;
            $define_sid = true;
        }
    }
    // Do we have an existing session ID?
    if (empty($session->id)) {
        // Create new session ID
        $session->id = _session_create_id();
    }
    // Is use_cookies set to false?
    if (!$session->use_cookies && $send_cookie) {
        $define_sid = true;
        $send_cookie = false;
    }
    // Should we send a cookie?
    if ($send_cookie) {
        setcookie($session->name, $session->id, $session->cookie_lifetime, $session->cookie_path, $session->cookie_domain);
    }
    // Should we define the SID?
    if ($define_sid) {
        $SID = $session->name . '=' . $session->id;
    }
    $session->nr_open_sessions++;
    // Send caching headers
    // Start session
    $mod = $GLOBALS[$session->mod_name];
    if (!$mod->open($session->save_path, $session->name)) {
        die('Failed to initialize session module.');
    }
    // Read session data
    if ($val = $mod->read($session->id)) {
        // Decode session data
        session_decode($val);
    }
    // Send HTTP cache headers
    _session_cache_limiter();
    // Check if we should clean up (call the garbage collection routines)
    if ($session->gc_probability > 0) {
        $randmax = getrandmax();
        $nrand = (int) (100 * zen_rand() / $randmax);
        if ($nrand < $session->gc_probability) {
            $mod->gc($session->gc_maxlifetime);
        }
    }
    if ($define_sid) {
        define('SID', $SID);
//.........这里部分代码省略.........

 /**
  * encode()
  * 
  * Encodes and returns the email. Also stores
  * it in the encoded member variable
  *
  * @return An associative array containing two elements,
  *         body and headers. The headers element is itself
  *         an indexed array.
  * @access public
  */
 function encode()
 {
     /* HPDL PHP3 */
     //      $encoded =& $this->_encoded;
     $encoded = $this->_encoded;
     if (zen_not_null($this->_subparts)) {
         $boundary = '=_' . md5(uniqid(zen_rand()) . microtime());
         $this->_headers['Content-Type'] .= ';' . $this->lf . chr(9) . 'boundary="' . $boundary . '"';
         // Add body parts to $subparts
         for ($i = 0; $i < count($this->_subparts); $i++) {
             $headers = array();
             /* HPDL PHP3 */
             //          $tmp = $this->_subparts[$i]->encode();
             $_subparts = $this->_subparts[$i];
             $tmp = $_subparts->encode();
             reset($tmp['headers']);
             while (list($key, $value) = each($tmp['headers'])) {
                 $headers[] = $key . ': ' . $value;
             }
             $subparts[] = implode($this->lf, $headers) . $this->lf . $this->lf . $tmp['body'];
         }
         $encoded['body'] = '--' . $boundary . $this->lf . implode('--' . $boundary . $this->lf, $subparts) . '--' . $boundary . '--' . $this->lf;
     } else {
         $encoded['body'] = $this->_getEncodedData($this->_body, $this->_encoding) . $this->lf;
     }
     // Add headers to $encoded
     /* HPDL PHP3 */
     //      $encoded['headers'] =& $this->_headers;
     $encoded['headers'] = $this->_headers;
     return $encoded;
 }