Function hook php error log?

[robagar]

hi all

I'm writing hooks for the AddonDomain module in php and having trouble. Simple tests work, so I know the hooks are registered ok. Do php errors get logged anywhere?

cheers
Rob

[cPanelDavidN]

It depends on which ini file you're using and the settings it has.

If you're following the example from the function hook page, then your shebang line is

#!/usr/bin/php-cgi

which means we can get the ini file location with

/usr/bin/php-cgi -i |grep --colour 'php.ini'
<tr><td class="e">error_reporting</td><td class="v">6135</td><td class="v">6135</td></tr>

Now we know which ini file to look at, /usr/local/lib/php.ini

What we want to know is
1) what/where the error log is defined to be
2) if errors are redirected to the STDOUT
3) if error reporting is enabled
4) and if errors are even logged

awk '/(^error_log[[:space:]]?=)|(^display_errors[[:space:]]?=)|(^error_reporting[[:space:]]?=)|(^log_errors[[:space:]]?=)/{print $0};' /usr/local/lib/php.ini

For my box, I got

display_errors = On
log_errors = On
error_log = /usr/local/cpanel/logs/error_log

but your's is likely to be different. But lets quickly analyze my results.

1) display_errors is "on". This means that any error message that would normally be sent to an error log will also be sent to STDOUT. This is not something that most people want in a production environment. In the case of function hooks this would not be a good setting since the output is trapped by the invoking cPanel process and will break the cPanel response (if any errors were to occur). Function hooks should never produce anything to STDOUT
- You can modify this in your script with

ini_set('display_errors', 0); 

- Or better, change the setting in the ini
- See display_errors in the PHP manual

2) log_errors is on, meaning that any errors will be send to the "error_log" location.
- See log_errors

3) my error_log setting is the standard cPanel error log. This is something that I personally set on my box because it's a convenient place. I think the current default for this value on a cPanel installation is simply "error_log", which is Apache's error log, /usr/local/apache/logs/error_log

ini_set('error_log', '/some/place'); 

- See error_log

4) Since nothing was returned for error_reporting, the default is applied, "6135" or "E_ALL & ~E_NOTICE"
- we can confirm this with a grep on the info output

/usr/bin/php-cgi -i |grep --colour error_reporting

- See error_reporting


Hope this helps get you going in the right direction.

Regards,
-DavidN

[robagar]

Wow! thanks for the comprehensive reply