Howto monitor num.proc with spaces and slashes?

[asdfg]

Hello, I have multiple PHP versions on my Linux server. How Can I monitor it?
This is output from ps ax
842 ? Ss 0:34 php-fpm: master process (/etc/php/7.1/fpm/php-fpm.conf)
845 ? Ss 0:34 php-fpm: master process (/etc/php/7.3/fpm/php-fpm.conf)
847 ? Ss 0:34 php-fpm: master process (/etc/php/7.2/fpm/php-fpm.conf)
8658 ? Ss 0:11 php-fpm: master process (/etc/php/7.0/fpm/php-fpm.conf)
9371 ? Ss 2:35 php-fpm: master process (/etc/php/5.6/fpm/php-fpm.conf)
if I try to test proc.num with zabbix_get, everytime the value is 0
zabbix_get -s 127.0.0.1 -k 'proc.num[php-fpm: master process (/etc/php/7.1/fpm/php-fpm.conf)]'
0
Thank you