Using PHP to view syslog in private web page Post: 303036827

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Top Forums UNIX for Beginners Questions & Answers Using PHP to view syslog in private web page Post 303036827 by Neo on Friday 12th of July 2019 11:15:26 PM

07-13-2019

Administrator

Generally in PHP you are better off with a simple shell_exec() command and then process the results in PHP.

For example, from the above code, you could do this:

Code:

<?php
$command = "tail -n 11 /var/log/_gateway-syslog.log");
$raw_output = shell_exec($command);
$output = process_output($raw_output):
echo "<pre>$output</pre>";

function  process_output($text)
{
  // do your text processing here instead of using a shell command pipeline in shell_exec()
 return $processed_text;
}

PHP has rich tools for text processing including regular expressions.

I written these types of PHP files to display unix / linux system information countless times, and I always process the text in PHP without exception.

In general, I find it best to decouple the "shell exec" type of commands from PHP as much as possible for a number of reasons, including system security, integrity and long-term system maintenance.

For a real-world example on this web site, we use shell_exec() to begin processing all the man pages in our man page repository; but the shell_exec() only returns the raw output from the man command. Then the PHP script extensively processes the raw man page output, adding links, formatting, html entities, css information, etc. There is a significant amount of text processing done in PHP, but the PHP shell_exec() command to get the man page from the Linux filesystem and output for processing is very basic / simple.

Neo

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php5-fpm

PHP-FPM(8)							Scripting Language							PHP-FPM(8)

NAME

       php-fpm - PHP FastCGI Process Manager 'PHP-FPM'

SYNOPSIS

       php-fpm [options]

DESCRIPTION

       PHP  is	a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. This
       is a variant of PHP that will run in the background as a daemon, listening for CGI requests. Output is logged to /var/log/php-fpm.log.

       Most options are set in the configuration file. The configuration file is /etc/php-fpm.conf.  By  default,  php-fpm  will  respond  to  CGI
       requests  listening  on localhost http port 9000. Therefore php-fpm expects your webserver to forward all requests for '.php' files to port
       9000 and you should edit your webserver configuration file appropriately.

OPTIONS

       -C	      Do not chdir to the script's directory

       --php-ini path|file
       -c path|file   Look for php.ini file in the directory path or use the specified file

       --no-php-ini
       -n	      No php.ini file will be used

       --define foo[=bar]
       -d foo[=bar]   Define INI entry foo with value bar

       -e	      Generate extended information for debugger/profiler

       --help
       -h	      This help

       --info
       -i	      PHP information and configuration

       --modules
       -m	      Show compiled in modules

       --version
       -v	      Version number --prefix path

       -p	      Specify alternative prefix path (the default is /usr)

       --fpm-config file
       -y	      Specify alternative path to FastCGI process manager configuration file (the default is /etc/php-fpm.conf)

       --test
       -t	      Test FPM configuration file and exit If called twice (-tt), the configuration is dumped before exiting.

       --zend-extension file
       -z file	      Load Zend extension file

FILES

       php-fpm.conf   The configuration file for the php-fpm daemon.

       php.ini	      The standard php configuration file.

SIGNAL

       Once started, php-fpm then responds to several POSIX signals:

	      SIGINT,SIGTERM	  immediate termination
	      SIGQUIT		  graceful stop
	      SIGUSR1		  re-open log file
	      SIGUSR2		  graceful reload of all workers + reload of fpm conf/binary

SEE ALSO

       The PHP-FPM website:
       http://php-fpm.org

       For a more or less complete description of PHP look here:
       http://www.php.net/manual/

       A nice introduction to PHP by Stig Bakken can be found here:
       http://www.zend.com/zend/art/intro.php

BUGS

       You can view the list of known bugs or report any new bug you found at:
       http://bugs.php.net

AUTHORS

       PHP-FPM SAPI was written by Andrei Nigmatulin. The mailing-lists are highload-php-en (English) and highload-php-ru (Russian).

       The PHP Group: Thies C. Arntzen, Stig Bakken, Andi Gutmans, Rasmus Lerdorf, Sam Ruby, Sascha Schumann, Zeev Suraski, Jim  Winstead,  Andrei
       Zmievski.

       A List of active developers can be found here:
       http://www.php.net/credits.php

       And last but not least PHP was developed with the help of a huge amount of contributors all around the world.

VERSION INFORMATION

       This manpage describes php-fpm, version 5.4.4-14+deb7u14.

COPYRIGHT

       Copyright (C) 1997-2009 The PHP Group
       Copyright (c) 2007-2009, Andrei Nigmatulin

       This  source  file  is  subject to version 3.01 of the PHP license, that is bundled with this package in the file LICENSE, and is available
       through the world-wide-web at the following url:
       http://www.php.net/license/3_01.txt

       If you did not receive a copy of the PHP license and  are  unable  to  obtain  it  through  the	world-wide-web,  please  send  a  note	to
       license@php.net so we can mail you a copy immediately.

The PHP Group							       2009								PHP-FPM(8)