PHP STDIN doesnt get the content from piped apache log

Question

I am piping apache log to php file in order to insert later the log to the database.

in the virtual host I have the line:
ErrorLog "|/usr/bin/php /opt/waffy/log2db.php"

in php I have:

$stdin = fopen ('php://stdin', 'r');
ob_implicit_flush (true); // Use unbuffered output
$data = "";
while ($line = fgets ($stdin))
{
   $data .=  $line;
}
file_put_contents("/opt/waffy/log.log",$data);

The php is invoked but the file /opt/waffy/log.log is empty.

UPDATE1

I think i have a little progress when I did chmod +X log2db.php nothing hapend, but when I replaced X with x I stopped getting the ERR_CONNECTION_REFUSED.

but the file /opt/waffy/log.log is not created...

Kordi · Accepted Answer · 2016-03-04 08:33:37Z

1

The script doesn't match what is expected for an Apache piped log script so what exactly is output is likely undefined. A minimal PHP example is:

#!/usr/bin/php

<?php
$stdin = fopen ('php://stdin', 'r');
ob_implicit_flush (true); // Use unbuffered output
while ($line = fgets ($stdin))
{
   print $line;
}

With the following enty in apache

ErrorLog "|/var/www/log.php >>/var/www/log.log"

Don't forget to give log.php the right permissions

chmod +x log.php

Apache needs the permission to write to the directory /var/www/ in my example.

See http://www.sudleyplace.com/pipederrorlogs.html for more details. First get it working so it simply outputs everything it receives and then modify the data and add features.

Important

You have to start apache via

/etc/init.d/apache2 restart 
/etc/init.d/apache2 start

and not via

service apache2 start
service apache2 restart

edited Mar 4, 2016 at 8:33

answered Mar 4, 2016 at 6:14

Kordi

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7 Comments

SexyMF Over a year ago

Putting this ` ErrorLog "|/opt/waffy/log2db.php >> /opt/waffy/out.log" ` in my virtual host, causing ERR_CONNECTION_REFUSED when accessing the page, even though configtest went ok.... Thanks. I think its every time the >> is in my virtual host...

Kordi Over a year ago

@SexyMF I tested it it works fine for me. You changed you script and added the line #!/usr/bin/php and looked at the right permissions

SexyMF Over a year ago

Yes, all dont, except my php is in #!/usr/bin/php5 (ubuntu)

Kordi Over a year ago

@SexyMF In your question you had /usr/bin/php so when you just to /opt/waffy/log2db.php it doesn't gives you an error. Perhaps remove the space between >> and /var. so thats then `>>/opt/waffy/out.log' . And apache has the permissions to write to /opt/waffy/out.log

Kordi Over a year ago

I am for sure if you following my example and create chmod 777 for the directory /opt/waffy/ it 100% will work. Apache just has not the right permission to write into the directory. I tested it on different server centos and debian. And my example always works, with the right permissions.

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