Description:
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When error_log = syslog is set at php.ini on php-fpm environment, broken ident (tag) is used like this:

Feb  7 22:02:36 phphost ool www: ERRORTEST
                        ^^^^^^^

This is caused by changing argv[0] by php-fpm. syslog() calls internally openlog() and it uses __progname as the default ident value, but the pointer __progname indicates the place of basename in old argv[0].

          v after the last slash
/usr/sbin/php5-fpm <- original argv[0]
          php5-fpm <- expected __progname
php-fpm: pool www  <- customized argv[0]
          ool www  <- actual __progname

I think "ool www" is not expected for most people. openlog() with proper ident (syslog.ident in php-fpm.conf?) argument should be called with php-fpm environment.



Test script:
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<?php error_log("ERRORTEST") ?>


Expected result:
----------------
A line like below will be written:
Feb  7 22:02:36 phphost php-fpm: ERRORTEST

Actual result:
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A line like below will be written:
Feb  7 22:02:36 phphost ool www: ERRORTEST