<?php

class Log

{

    /**

     * @Purpose      :  写日志

     * @Method Name  :  writeLog()

     * @parameter     :  string $explain          错误说明

     *                  string $error_location    错误位置

     *                  string $dir               保存日志的文件夹名

     * @return         :  (无)

     */

    function writeLog($explain,$error_location,$dir){

        if (empty($dir)) return false;

        $error_msg = "";

        if(strlen($explain) != 0){

            $error_msg .= '['.date("Y-m-d H:i:s",time()).' error_explain: ] '. $explain;

        }

        if(strlen($error_location) != 0){

            $error_msg .= ' [ error_location: ] '. $error_location;

        }

        if(! is_dir($dir)){

            mkdir($dir,0777);

            system("chown root.root {$dir} -R;chmod 777 {$dir} -R");    // 修改目录所有者，所属组和权限

        }

        $file_name = date('Y-m-d',time()).'.txt';

        $file_name = $dir.$file_name;

        if(! $file_name == false){

            system("chown root.root {$file_name} -R; chmod 777 {$file_name} -R");

            $handle1 = fopen($file_name,'w');

            fwrite($handle1,"//log file , please do not modify me! \n");

            fwrite($handle1,'//Created on '.date('M j, Y, G:i',time())."\n");    // 类似于这种格式 ：Created on Jun 26,2017, 11:22

            fclose($handle1);

        }

        if(is_file($file_name)){

            $handle2 = fopen($file_name,'a');

            fwrite($handle2,"$error_msg \n");

            fclose($handle2);

        }

        /*

        最后打印出来的日志类似于这样：

        //log file , please do not modify me!

        //Created on Jun 26, 2017, 11:34

        [2017-06-26 11:34:29 error_explain: ] test_explain [ error_location: ] the error at E:\www\test\index.php line 55

        */

     }

    /**

     * @Purpose       :    获取错误所在位置

     * @Method  Name  :    getErrorLine()

     * @Parameters    :    string  $line    行号

     * @Return array  :    $error_line      错误所在位置

     */

    public function getErrorLine($line)

    {

        $error_line = __FILE__ . ' line ' . $line ;

        return ' '.$error_line;

    }

}

$Log = new Log();

$Log -> writeLog('test_explain','the error at' . $Log -> getErrorLine(__LINE__),'E:/www/test/log/');

    /**

     * @purpose :   写日志

     * @param   :   string  $data   :   写入的数据

     *          :   string  $logDir :   日志目录

     *          :   string  $file   :   文件名前缀

     * @Author  :   daicr

     * @Time    :   2018-11-20

     */

    public function writeLog($data,$logDir='/tmp/', $fileName='') {

        $write_line    = "";

        $now    = date('Y-m-d H:i:s',time());

        if(strlen($data)>0) {

            $write_line    .= "[" . date('Y-m-d H:i:s',time()) . "]" . $data;

        }

        $dir = $logDir;

        if(!is_dir($dir)) {

            mkdir($dir, 0777);

        }

        system("chown justswitch.justswitch {$dir} -R; chmod 777 {$dir} -R;");

        $fileName = $fileName.date('Y-m',time());

        $fileName = $dir.$fileName.".txt";

        if (false==file_exists($fileName)){

            if($fp = fopen("$fileName", 'w')) {

                system("chown justswitch.justswitch -R $dir;chmod 777 $dir -R;");

                fwrite($fp, "\n//JUST-CALL! log file, DO NOT modify me!\n".

                    "//Created on ".date("M j, Y, G:i")."\n");

                fclose($fp);

            }

        }

        if($fp = fopen("$fileName",'a')) {

            fwrite($fp,"$write_line\n");

            fclose($fp);

        }

        system("chown justswitch.justswitch {$fileName};chmod 777 {$fileName};");

    }