CI 프레임워크(CodeIgniter)가 Redis를 작동하는 방법

이 글은 주로 CI 프레임워크(CodeIgniter)가 Redis를 운영하는 방법을 소개하고, Redis 데이터베이스 운영을 위한 CodeIgniter 프레임워크의 관련 구성 및 활용 기술을 분석합니다. 도움이 필요한 친구들은 참고할 수 있습니다

이 글은 CI 프레임워크의 운영을 설명합니다( CodeIgniter) redis 메소드 예제가 포함되어 있습니다. 참조용으로 모든 사람과 공유하세요. 세부 사항은 다음과 같습니다.

1. autoload.php에 다음 구성 줄을 추가합니다.

$autoload['libraries'] = array('redis');

2. /application/config에 redis.php 파일을 추가합니다. 파일 내용은 다음과 같습니다.

<?php
// Default connection group
$config[&#39;redis_default&#39;][&#39;host&#39;] = &#39;localhost&#39;;   // IP address or host
$config[&#39;redis_default&#39;][&#39;port&#39;] = &#39;6379&#39;;     // Default Redis port is 6379
$config[&#39;redis_default&#39;][&#39;password&#39;] = &#39;&#39;;     // Can be left empty when the server does not require AUTH
$config[&#39;redis_slave&#39;][&#39;host&#39;] = &#39;&#39;;
$config[&#39;redis_slave&#39;][&#39;port&#39;] = &#39;6379&#39;;
$config[&#39;redis_slave&#39;][&#39;password&#39;] = &#39;&#39;;
?>

3. Redis.php 파일을 /application/libraries

에 추가합니다. 파일 소스: redis 라이브러리 파일 패키지

파일 내용:

<?php defined(&#39;BASEPATH&#39;) OR exit(&#39;No direct script access allowed&#39;);
/**
 * CodeIgniter Redis
 *
 * A CodeIgniter library to interact with Redis
 *
 * @package     CodeIgniter
 * @category    Libraries
 * @author     Joël Cox
 * @version     v0.4
 * @link      https://github.com/joelcox/codeigniter-redis
 * @link      http://joelcox.nl
 * @license     http://www.opensource.org/licenses/mit-license.html
 */
class CI_Redis {
  /**
   * CI
   *
   * CodeIgniter instance
   * @var   object
   */
  private $_ci;
  /**
   * Connection
   *
   * Socket handle to the Redis server
   * @var   handle
   */
  private $_connection;
  /**
   * Debug
   *
   * Whether we&#39;re in debug mode
   * @var   bool
   */
  public $debug = FALSE;
  /**
   * CRLF
   *
   * User to delimiter arguments in the Redis unified request protocol
   * @var   string
   */
  const CRLF = "\r\n";
  /**
   * Constructor
   */
  public function __construct($params = array())
  {
    log_message(&#39;debug&#39;, &#39;Redis Class Initialized&#39;);
    $this->_ci = get_instance();
    $this->_ci->load->config(&#39;redis&#39;);
    // Check for the different styles of configs
    if (isset($params[&#39;connection_group&#39;]))
    {
      // Specific connection group
      $config = $this->_ci->config->item(&#39;redis_&#39; . $params[&#39;connection_group&#39;]);
    }
    elseif (is_array($this->_ci->config->item(&#39;redis_default&#39;)))
    {
      // Default connection group
      $config = $this->_ci->config->item(&#39;redis_default&#39;);
    }
    else
    {
      // Original config style
      $config = array(
        &#39;host&#39; => $this->_ci->config->item(&#39;redis_host&#39;),
        &#39;port&#39; => $this->_ci->config->item(&#39;redis_port&#39;),
        &#39;password&#39; => $this->_ci->config->item(&#39;redis_password&#39;),
      );
    }
    // Connect to Redis
    $this->_connection = @fsockopen($config[&#39;host&#39;], $config[&#39;port&#39;], $errno, $errstr, 3);
    // Display an error message if connection failed
    if ( ! $this->_connection)
    {
      show_error(&#39;Could not connect to Redis at &#39; . $config[&#39;host&#39;] . &#39;:&#39; . $config[&#39;port&#39;]);
    }
    // Authenticate when needed
    $this->_auth($config[&#39;password&#39;]);
  }
  /**
   * Call
   *
   * Catches all undefined methods
   * @param  string method that was called
   * @param  mixed  arguments that were passed
   * @return mixed
   */
  public function __call($method, $arguments)
  {
    $request = $this->_encode_request($method, $arguments);
    return $this->_write_request($request);
  }
  /**
   * Command
   *
   * Generic command function, just like redis-cli
   * @param  string full command as a string
   * @return mixed
   */
  public function command($string)
  {
    $slices = explode(&#39; &#39;, $string);
    $request = $this->_encode_request($slices[0], array_slice($slices, 1));
    return $this->_write_request($request);
  }
  /**
   * Auth
   *
   * Runs the AUTH command when password is set
   * @param  string password for the Redis server
   * @return void
   */
  private function _auth($password = NULL)
  {
    // Authenticate when password is set
    if ( ! empty($password))
    {
      // See if we authenticated successfully
      if ($this->command(&#39;AUTH &#39; . $password) !== &#39;OK&#39;)
      {
        show_error(&#39;Could not connect to Redis, invalid password&#39;);
      }
    }
  }
  /**
   * Clear Socket
   *
   * Empty the socket buffer of theconnection so data does not bleed over
   * to the next message.
   * @return NULL
   */
  public function _clear_socket()
  {
    // Read one character at a time
    fflush($this->_connection);
    return NULL;
  }
  /**
   * Write request
   *
   * Write the formatted request to the socket
   * @param  string request to be written
   * @return mixed
   */
  private function _write_request($request)
  {
    if ($this->debug === TRUE)
    {
      log_message(&#39;debug&#39;, &#39;Redis unified request: &#39; . $request);
    }
    // How long is the data we are sending?
    $value_length = strlen($request);
    // If there isn&#39;t any data, just return
    if ($value_length <= 0) return NULL;
    // Handle reply if data is less than or equal to 8192 bytes, just send it over
    if ($value_length <= 8192)
    {
      fwrite($this->_connection, $request);
    }
    else
    {
      while ($value_length > 0)
      {
        // If we have more than 8192, only take what we can handle
        if ($value_length > 8192) {
          $send_size = 8192;
        }
        // Send our chunk
        fwrite($this->_connection, $request, $send_size);
        // How much is left to send?
        $value_length = $value_length - $send_size;
        // Remove data sent from outgoing data
        $request = substr($request, $send_size, $value_length);
      }
    }
    // Read our request into a variable
    $return = $this->_read_request();
    // Clear the socket so no data remains in the buffer
    $this->_clear_socket();
    return $return;
  }
  /**
   * Read request
   *
   * Route each response to the appropriate interpreter
   * @return mixed
   */
  private function _read_request()
  {
    $type = fgetc($this->_connection);
    // Times we will attempt to trash bad data in search of a
    // valid type indicator
    $response_types = array(&#39;+&#39;, &#39;-&#39;, &#39;:&#39;, &#39;$&#39;, &#39;*&#39;);
    $type_error_limit = 50;
    $try = 0;
    while ( ! in_array($type, $response_types) && $try < $type_error_limit)
    {
      $type = fgetc($this->_connection);
      $try++;
    }
    if ($this->debug === TRUE)
    {
      log_message(&#39;debug&#39;, &#39;Redis response type: &#39; . $type);
    }
    switch ($type)
    {
      case &#39;+&#39;:
        return $this->_single_line_reply();
        break;
      case &#39;-&#39;:
        return $this->_error_reply();
        break;
      case &#39;:&#39;:
        return $this->_integer_reply();
        break;
      case &#39;$&#39;:
        return $this->_bulk_reply();
        break;
      case &#39;*&#39;:
        return $this->_multi_bulk_reply();
        break;
      default:
        return FALSE;
    }
  }
  /**
   * Single line reply
   *
   * Reads the reply before the EOF
   * @return mixed
   */
  private function _single_line_reply()
  {
    $value = rtrim(fgets($this->_connection));
    $this->_clear_socket();
    return $value;
  }
  /**
   * Error reply
   *
   * Write error to log and return false
   * @return bool
   */
  private function _error_reply()
  {
    // Extract the error message
    $error = substr(rtrim(fgets($this->_connection)), 4);
    log_message(&#39;error&#39;, &#39;Redis server returned an error: &#39; . $error);
    $this->_clear_socket();
    return FALSE;
  }
  /**
   * Integer reply
   *
   * Returns an integer reply
   * @return int
   */
  private function _integer_reply()
  {
    return (int) rtrim(fgets($this->_connection));
  }
  /**
   * Bulk reply
   *
   * Reads to amount of bits to be read and returns value within
   * the pointer and the ending delimiter
   * @return string
   */
  private function _bulk_reply()
  {
    // How long is the data we are reading? Support waiting for data to
    // fully return from redis and enter into socket.
    $value_length = (int) fgets($this->_connection);
    if ($value_length <= 0) return NULL;
    $response = &#39;&#39;;
    // Handle reply if data is less than or equal to 8192 bytes, just read it
    if ($value_length <= 8192)
    {
      $response = fread($this->_connection, $value_length);
    }
    else
    {
      $data_left = $value_length;
        // If the data left is greater than 0, keep reading
        while ($data_left > 0 ) {
        // If we have more than 8192, only take what we can handle
        if ($data_left > 8192)
        {
          $read_size = 8192;
        }
        else
        {
          $read_size = $data_left;
        }
        // Read our chunk
        $chunk = fread($this->_connection, $read_size);
        // Support reading very long responses that don&#39;t come through
        // in one fread
        $chunk_length = strlen($chunk);
        while ($chunk_length < $read_size)
        {
          $keep_reading = $read_size - $chunk_length;
          $chunk .= fread($this->_connection, $keep_reading);
          $chunk_length = strlen($chunk);
        }
        $response .= $chunk;
        // Re-calculate how much data is left to read
        $data_left = $data_left - $read_size;
      }
    }
    // Clear the socket in case anything remains in there
    $this->_clear_socket();
  return isset($response) ? $response : FALSE;
  }
  /**
   * Multi bulk reply
   *
   * Reads n bulk replies and return them as an array
   * @return array
   */
  private function _multi_bulk_reply()
  {
    // Get the amount of values in the response
    $response = array();
    $total_values = (int) fgets($this->_connection);
    // Loop all values and add them to the response array
    for ($i = 0; $i < $total_values; $i++)
    {
      // Remove the new line and carriage return before reading
      // another bulk reply
      fgets($this->_connection, 2);
      // If this is a second or later pass, we also need to get rid
      // of the $ indicating a new bulk reply and its length.
      if ($i > 0)
      {
        fgets($this->_connection);
        fgets($this->_connection, 2);
      }
      $response[] = $this->_bulk_reply();
    }
    // Clear the socket
    $this->_clear_socket();
    return isset($response) ? $response : FALSE;
  }
  /**
   * Encode request
   *
   * Encode plain-text request to Redis protocol format
   * @link  http://redis.io/topics/protocol
   * @param  string request in plain-text
   * @param  string additional data (string or array, depending on the request)
   * @return string encoded according to Redis protocol
   */
  private function _encode_request($method, $arguments = array())
  {
    $request = &#39;$&#39; . strlen($method) . self::CRLF . $method . self::CRLF;
    $_args = 1;
    // Append all the arguments in the request string
    foreach ($arguments as $argument)
    {
      if (is_array($argument))
      {
        foreach ($argument as $key => $value)
        {
          // Prepend the key if we&#39;re dealing with a hash
          if (!is_int($key))
          {
            $request .= &#39;$&#39; . strlen($key) . self::CRLF . $key . self::CRLF;
            $_args++;
          }
          $request .= &#39;$&#39; . strlen($value) . self::CRLF . $value . self::CRLF;
          $_args++;
        }
      }
      else
      {
        $request .= &#39;$&#39; . strlen($argument) . self::CRLF . $argument . self::CRLF;
        $_args++;
      }
    }
    $request = &#39;*&#39; . $_args . self::CRLF . $request;
    return $request;
  }
  /**
   * Info
   *
   * Overrides the default Redis response, so we can return a nice array
   * of the server info instead of a nasty string.
   * @return array
   */
  public function info($section = FALSE)
  {
    if ($section !== FALSE)
    {
      $response = $this->command(&#39;INFO &#39;. $section);
    }
    else
    {
      $response = $this->command(&#39;INFO&#39;);
    }
    $data = array();
    $lines = explode(self::CRLF, $response);
    // Extract the key and value
    foreach ($lines as $line)
    {
      $parts = explode(&#39;:&#39;, $line);
      if (isset($parts[1])) $data[$parts[0]] = $parts[1];
    }
    return $data;
  }
  /**
   * Debug
   *
   * Set debug mode
   * @param  bool  set the debug mode on or off
   * @return void
   */
  public function debug($bool)
  {
    $this->debug = (bool) $bool;
  }
  /**
   * Destructor
   *
   * Kill the connection
   * @return void
   */
  function __destruct()
  {
    if ($this->_connection) fclose($this->_connection);
  }
}
?>

4 . 그런 다음 Used

<?php
  if($this->redis->get(&#39;mark_&#39;.$gid) === null){ //如果未设置
    $this->redis->set(&#39;mark_&#39;.$gid, $giftnum); //设置
    $this->redis->EXPIRE(&#39;mark_&#39;.$gid, 30*60); //设置过期时间 （30 min）
  }else{
    $giftnum = $this->redis->get(&#39;mark_&#39;.$gid); //从缓存中直接读取对应的值
  }
?>

5 파일에서 이 작업을 수행할 수 있습니다. 중요한 점은 여기에 필요한 것이 자세히 설명되어 있다는 것입니다

사용하는 모든 기능만 변경하면 됩니다

$redis  ==> $this->redis

It 다음 사항에 유의하세요.

(1) Redis 서비스(Windows 설치)를 로컬로 설치해야 합니다

(2) 그리고 Redis 서비스를 활성화해야 합니다

(3) Windows이든 Linux이든 Redis 확장을 설치해야 합니다. 해당 PHP 버전

관련 권장 사항:

CI 프레임워크 컨트롤러 이름 및 메서드 이름을 얻는 방법

CI 프레임워크 통합 smarty 인스턴스에 대한 자세한 설명

위 내용은 CI 프레임워크(CodeIgniter)가 Redis를 작동하는 방법의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!