自定义 codeigniter log_message() 的日志文件名

Question

CodeIgniter 2.1.0 中是否可以自定义log_message() 生成的日志文件名？默认情况下，它的文件名是根据当前日期生成的。

Answer 1

log_message()函数是常用的系统函数。它使用Log::write_log() 方法记录错误。它不好破解核心文件。所以你可以扩展日志库并覆盖write_log()函数。

如果您还没有扩展 Log 课程。创建文件application/libraries/MY_Log.php

class MY_Log extends CI_Log  {

    function MY_Log ()
    {
        parent::__construct();

        $this->ci =& get_instance();
    }

    public function write_log() { //here overriding
        if ($this->_enabled === FALSE)
        {
        return FALSE;
        }

        $level = strtoupper($level);

        if ( ! isset($this->_levels[$level]) OR
        ($this->_levels[$level] > $this->_threshold))
        {
        return FALSE;
        }

        /* HERE YOUR LOG FILENAME YOU CAN CHANGE ITS NAME */
        $filepath = $this->_log_path.'log-'.date('Y-m-d').EXT;
        $message  = '';

        if ( ! file_exists($filepath))
        {
        $message .= "<"."?php  if ( ! defined('BASEPATH'))
        exit('No direct script access allowed'); ?".">\n\n";
        }

        if ( ! $fp = @fopen($filepath, FOPEN_WRITE_CREATE))
        {
        return FALSE;
        }

        $message .= $level.' '.(($level == 'INFO') ? ' -' : '-').' ';
        $message .= date($this->_date_fmt). ' --> '.$msg."\n";

        flock($fp, LOCK_EX);
        fwrite($fp, $message);
        flock($fp, LOCK_UN);
        fclose($fp);

        @chmod($filepath, FILE_WRITE_MODE);
        return TRUE;
    }
}

log_message() 功能将按您的意愿工作

Answer 2

借助 CI 2.1.3，它可以使用此代码工作。在库文件夹中创建了 MY_Log.php。不确切需要什么 OP，但每个人都会明白如何修改 :)

<?php 
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package        CodeIgniter
 * @author        ExpressionEngine Dev Team
 * @copyright    Copyright (c) 2006, EllisLab, Inc.
 * @license        http://codeigniter.com/user_guide/license.html
 * @link        http://codeigniter.com
 * @since        Version 1.0
 * @filesource
 */
// ------------------------------------------------------------------------
/**
 * MY_Logging Class
 *
 * This library assumes that you have a config item called
 * $config['show_in_log'] = array();
 * you can then create any error level you would like, using the following format
 * $config['show_in_log']= array('DEBUG','ERROR','INFO','SPECIAL','MY_ERROR_GROUP','ETC_GROUP'); 
 * Setting the array to empty will log all error messages. 
 * Deleting this config item entirely will default to the standard
 * error loggin threshold config item. 
 *
 * @package        CodeIgniter
 * @subpackage    Libraries
 * @category    Logging
 * @author        ExpressionEngine Dev Team. Mod by Chris Newton
 */
class MY_Log extends CI_Log {
    /**
     * Constructor
     */
    public function __construct()
    {
        $config =& get_config();

        $this->_log_path = ($config['log_path'] != '') ? $config['log_path'] : APPPATH.'logs/';

        if ( ! is_dir($this->_log_path) OR ! is_really_writable($this->_log_path))
        {
            $this->_enabled = FALSE;
        }

        if (is_numeric($config['log_threshold']))
        {
            $this->_threshold = $config['log_threshold'];
        }

        if ($config['log_date_format'] != '')
        {
            $this->_date_fmt = $config['log_date_format'];
        }
    }

    private function isCommandLineInterface()
    {
        return (php_sapi_name() === 'cli');
    }

    // --------------------------------------------------------------------
    /**
     * Write Log File
     *
     * Generally this function will be called using the global log_message() function
     *
     * @access    public
     * @param    string    the error level
     * @param    string    the error message
     * @param    bool    whether the error is a native PHP error
     * @return    bool
     */        
   public function write_log($level = 'error', $msg, $php_error = FALSE)
    {


        if ($this->_enabled === FALSE)
        {
            return FALSE;
        }

        $level = strtoupper($level);

        if ( ! isset($this->_levels[$level]) OR ($this->_levels[$level] > $this->_threshold))
        {
            return FALSE;
        }

        $filepath = $this->_log_path.'log-'.date('Y-m-d').'.php';
        $message  = '';

        if ( ! file_exists($filepath))
        {
            $message .= "<"."?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed'); ?".">\n\n";
        }

        if ( ! $fp = @fopen($filepath, FOPEN_WRITE_CREATE))
        {
            return FALSE;
        }

        if ($this->isCommandLineInterface()) {
            $message .= 'CMD ';
        }

        $message .= $level.' '.(($level == 'INFO') ? ' -' : '-').' '.date($this->_date_fmt). ' --> '.$msg."\n";

        flock($fp, LOCK_EX);
        fwrite($fp, $message);
        flock($fp, LOCK_UN);
        fclose($fp);

        @chmod($filepath, FILE_WRITE_MODE);
        return TRUE;
    }

}

Answer 3

@safarov 的回答很棒，但是在具体代码方面有点过时了，下面是如何制作自己的：

• 按照@safarov 的描述创建您的 MY_Log 类，但不要覆盖该方法。
• 找到包含 CI_Log 类的文件，在 CI 3.1.10 中它被称为 Log.php，如果你使用 composer，你可能会在 /vendor/codeigniter/framework/system/core/Log.php 找到它
• 在该文件中，找到 write_log 函数并将整个内容复制到您的新类中。
• 编辑该函数以根据需要命名文件。
• 更新 CI 时别忘了更新这个函数！