PHP如何将log信息写入服务器中的log文件

将log信息写入服务器中的log文件文件，折腾了一大圈终于找到了解决方案，具体内容如下：

折腾：

【记录】php中如何写类和如何使用类

期间，需要整理出一份，可配置的，通用的，log系统。

支持写入log信息到log文件中。

【折腾过程】

1.搜：

php log to file

参考：

php: error_log – manual

php: syslog – manual

how to create logs with php – web services wiki

write to a log file with php | redips spider net

下载代码：

download redips10.tar.gz

2.期间：

【已解决】php中函数前面加上at符号@的作用

3.然后用代码：

crifanlib.php

<?php
/*
[filename]
crifanlib.php
[function]
crifan's php lib, implement common functions
[author]
crifan li
[contact]
http://www.crifan.com/contact_me/
[note]
1.online see code:
http://code.google.com/p/crifanlib/source/browse/trunk/php/crifanlib.php
[todo]
[history]
[v1.0]
1.initial version, need clean up later
*/
class crifanlib {
 private $logfile;
 private $logfp;
 /*
  init log file
 */
 function loginit($inputlogfile = null){
  // set default log file name
  // in case of windows set default log file
  //http://*.com/questions/1482260/how-to-get-the-os-on-which-php-is-running
  //http://php.net/manual/zh/function.php-uname.php
  if (strtoupper(substr(php_os, 0, 3)) === 'win') {
   $defautlogfile = 'c:/php/deflogfile.log';
  }
  // set default log file for linux and other systems
  else {
   $defautlogfile = '/tmp/deflogfile.log';
  }
  $this->logfile = $inputlogfile ? $inputlogfile : $defautlogfile;
  // open log file for writing only and place file pointer at the end of the file
  // (if the file does not exist, try to create it)
  $this->logfp = fopen($this->logfile, 'a') or exit("can't open $this->logfile!");
 }
 /*
  write log info to file
 */
 function logwrite($logcontent){
  // if file pointer doesn't exist, then open log file
  if (!is_resource($this->logfp)) {
   $this->loginit();
  }
  // define script name
  $script_name = pathinfo($_server['php_self'], pathinfo_filename);
  // define current time and suppress e_warning if using the system tz settings
  // (don't forget to set the ini setting date.timezone)
  $time = @date('[y-m-d h:i:s] ');
  // write current time, script name and message to the log file
  fwrite($this->logfp, "$time ($script_name) $logcontent" . php_eol);
 }
 /*
  deinit log
 */
 function logdeinit(){
  if (is_resource($this->logfp)) {
   fclose($this->logfp);
  }
 }
}
 ?>

然后测试代码：

<?php
/*
 author: crifan li
 version: 2015-07-27
 contact: http://www.crifan.com/about/me/
 function:  wechat get access token
*/
include_once "crifanlib.php";
//test log
$crifanlib = new crifanlib();
$crifanlib->loginit("/xxx/access_token/crifanlibtest.log");
$crifanlib->logwrite("this is crifanlib log test message.");
$crifanlib->logdeinit();
?>

然后去执行对应的代码：

页面是没有任何输出的：

然后的确生成了log文件了：

root@chantyou:php# cd access_token/
root@chantyou:access_token# ll
total 16
-rwxrwxrwx 1 root root 9335 jul 27 17:51 crifanlib.php
-rwxrwxrwx 1 root root 567 jul 27 17:52 wx_access_token.php
root@chantyou:access_token# ll
total 20
-rwxrwxrwx 1 root  root  9335 jul 27 17:51 crifanlib.php
-rw-r--r-- 1 apache apache  77 jul 27 17:56 crifanlibtest.log
-rwxrwxrwx 1 root  root  567 jul 27 17:52 wx_access_token.php
root@chantyou:access_token# cat crifanlibtest.log 
[2015-07-27 10:10:33] (wx_access_token) this is crifanlib log test message.
root@chantyou:access_token#

【注意】

要记得给对应的（此处是linux服务器中的对应的文件夹添加写权限：

root@chantyou:php# ll
total 48
drwxr-xr-x 2 root root 4096 jul 27 17:55 access_token
-rwxr-xr-x 1 root root 1091 sep 25 2014 errorcode.php
-rw-r--r-- 1 root root 2230 jun 10 14:16 micromsgverify.php
-rwxr-xr-x 1 root root 4288 sep 25 2014 pkcs7encoder.php
-rwxr-xr-x 1 root root 452 sep 15 2014 readme.txt
-rwxr-xr-x 1 root root 724 sep 22 2014 sha1.php
drwxr-xr-x 2 root root 4096 jul 20 12:34 wechat_encypt
-rwxr-xr-x 1 root root 5327 sep 15 2014 wxbizmsgcrypt.php
-rwxrwxrwx 1 root root 2455 jul 16 18:06 wx_didaosuzhou.php
-rwxr-xr-x 1 root root 1346 sep 22 2014 xmlparse.php
root@chantyou:php# chmod ugo+wx access_token/  
root@chantyou:php# ll
total 48
drwxrwxrwx 2 root root 4096 jul 27 17:55 access_token
-rwxr-xr-x 1 root root 1091 sep 25 2014 errorcode.php
-rw-r--r-- 1 root root 2230 jun 10 14:16 micromsgverify.php
-rwxr-xr-x 1 root root 4288 sep 25 2014 pkcs7encoder.php
-rwxr-xr-x 1 root root 452 sep 15 2014 readme.txt
-rwxr-xr-x 1 root root 724 sep 22 2014 sha1.php
drwxr-xr-x 2 root root 4096 jul 20 12:34 wechat_encypt
-rwxr-xr-x 1 root root 5327 sep 15 2014 wxbizmsgcrypt.php
-rwxrwxrwx 1 root root 2455 jul 16 18:06 wx_didaosuzhou.php
-rwxr-xr-x 1 root root 1346 sep 22 2014 xmlparse.php

否则会报错的：

can't open /xxx/access_token/crifanlibtest.log file!

4.不过突然想起来：

之前已经学过了，

file_put_contents

就可以替代了：fopen，fwrite，fclose了。

所以再去优化为：

crifanlib.php

<?php
/*
[filename]
crifanlib.php
[function]
crifan's php lib, implement common functions
[author]
crifan li
[contact]
http://www.crifan.com/contact_me/
[note]
1.online see code:
http://code.google.com/p/crifanlib/source/browse/trunk/php/crifanlib.php
[todo]
[history]
[v2015-07-27]
1.add loginit, logwrite
[v1.0]
1.initial version, need clean up later
*/
class crifanlib {
 private $logfile;
 private $logfp;
 /*
  init log file
 */
 function loginit($inputlogfile = null){
  // set default log file name
  // in case of windows set default log file
  //http://*.com/questions/1482260/how-to-get-the-os-on-which-php-is-running
  //http://php.net/manual/zh/function.php-uname.php
  if (strtoupper(substr(php_os, 0, 3)) === 'win') {
   $defautlogfile = 'c:/php/deflogfile.log';
  }
  // set default log file for linux and other systems
  else {
   $defautlogfile = '/tmp/deflogfile.log';
  }
  $this->logfile = $inputlogfile ? $inputlogfile : $defautlogfile;
 }
 /*
  write log info to file
 */
 function logwrite($logcontent){
  // define script name
  $scriptname = pathinfo($_server['php_self'], pathinfo_filename);
  // define current time and suppress e_warning if using the system tz settings
  // (don't forget to set the ini setting date.timezone)
  $timestr = @date('[y-m-d h:i:s]');
  // write current time, script name and message to the log file
  file_put_contents($this->logfile, "$timestr ($scriptname) $logcontent" . php_eol, file_append);
 }
}
 ?>

测试文件为：

<?php
/*
 author: crifan li
 version: 2015-07-27
 contact: http://www.crifan.com/about/me/
 function: test crifanlib log
*/
include_once "crifanlib.php";
//test log
$crifanlib = new crifanlib();
$crifanlib->loginit("/xxx/logtest.log");
$crifanlib->logwrite("this is crifanlib log test message using file_put_contents");
?>

效果是：

# ll
total 16
-rw-r--r-- 1 root root 9524 jul 27 18:16 crifanlib.php
-rwxrwxrwx 1 root root  561 jul 27 18:18 wx_access_token.php
# ll
total 20
-rw-r--r-- 1 root   root   9524 jul 27 18:16 crifanlib.php
-rw-r--r-- 1 apache apache   76 jul 27 18:19 logtest.log
-rwxrwxrwx 1 root   root    561 jul 27 18:18 wx_access_token.php
# cat logtest.log
[2015-07-27 12:05:47] (wx_access_token) this is crifanlib log test message using file_put_contents
#
如图：

注：

期间参考：

php: is_resource – manual

【总结】

1.此处可以通过：

fopen创建log文件
fwrite写入文件信息
fclose关闭文件
去实现log信息写入到文件中的。

2.更好的做法是：

直接用更方便的

file_put_contents直接输出内容到log文件
即可。

以上就是将log信息写入服务器中的log文件文件全部内容，希望大家喜欢。