php not logging errors log_errors=on, error_log path exists

Question

Using php5.6 (legacy codebase), apache, ubuntu16.

phpinfo() says that: log_errors is on error_log = /var/log/apache2/php_errors.log

When display_errors is on there is output. But /var/log/apache2/ does not contain a php_errors.log file.

Have restarted apache ( /etc/init.d/apache2 restart ).

log_errors_max_len is 1024 .

ls -ld /var/log/apache2
drwxr-x--- 2 root   adm    4096 Mar 30 18:47 apache2

ls -l /var/log/apache2
-rw-r----- 1 root adm        0 Mar 30 06:25 access.log
-rw-r----- 1 root adm     5967 Mar 30 01:47 access.log.1
-rw-r----- 1 root adm    11618 Mar 31 04:07 error.log
-rw-r----- 1 root adm    11742 Mar 30 06:25 error.log.1

What am I missing?

Answer 1

From above comments. When using Apache2, each VirtualHost can have it's own log files.

So the /etc/apache2/ directory would have a sites-available directory along these lines:

├── sites-available
│   ├── 000-default.conf
│   ├── default-ssl.conf
│   ├── default-tls.conf
│   ├── www.domain.com.conf
│   └── www.domain.com-le-ssl.conf

And the www. files might look like the following example.

To set up specific php log file, separate from Apache logs, follow this answer :

<VirtualHost *:80>
    ServerName example.com
    DocumentRoot /var/www/domains/example.com/html
    ErrorLog /var/www/domains/example.com/apache.error.log
    CustomLog /var/www/domains/example.com/apache.access.log common
    php_flag log_errors on
    php_flag display_errors on
    php_value error_reporting 2147483647
    php_value error_log /var/www/domains/example.com/php.error.log
</VirtualHost>