I was trying to steal those, but when I setup my local version, I things a little different: php-fpm and glibc because I thought this how everyone would run php with nginx. PHP-FPM recycled OOM workers, so there were no corrupted state to exploit and then when I switched to "php -s", glibc with ASLR made it not very practical to exploit.

Changed my lab to use the same alpine + php = tada working exploit.