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A web app I'm trying to install on my ubuntu 10.04 LTS requires mcrypt, and is generating this error: Fatal error: Call to undefined function mcrypt_module_open(). I know this is the same question as this one: Installed php-mcrypt but it doesn't show up in phpinfo(), but I tried several things, none of which worked, and have additional questions. I would comment on the original thread but don't have enough reputation to do so; forgive me for the duplicate question.

My versions of php and mcrypt are (both installed via apt-get):

php: 5.3.2-1ubuntu4.10 mcrypt: 5.3.2-0ubuntu

Doing a php -m shows that the mcrypt module is installed. I installed mcrypt and php5-mcrypt via apt-get.

Also, I'm using nginx as my web server. I have tried reinstalling mcrypt and restarting nginx, but still can't get mcrypt to show up on phpinfo() and calls to mcrypt are still broken.

Here is some more info:

$ php -i | grep "mcrypt" /etc/php5/cli/conf.d/mcrypt.ini, mcrypt mcrypt support => enabled mcrypt.algorithms_dir => no value => no value mcrypt.modes_dir => no value => no value

I also checked that mcrypt is on in /etc/php5/cli/conf.d/mcrypt.ini and /etc/php5/cgi/conf.d/mcrypt.ini.

Lastly, I'm using fastCGI with nginx. I googled around and saw suggestions to restart php5-fpm. I couldn't find php5-fpm in apt-get, I'm not sure if I still need php5-fpm since I already have fastCGI.

Is there anything else I'm missing?

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  • Just reboot your machine. Commented Dec 1, 2011 at 9:02
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    Why on earth would he reboot his machine? He just has to restart the PHP process... (not nginx) Commented Dec 1, 2011 at 16:16
  • Rebooting the machine actually worked. How could I have restarted the PHP processes without rebooting? Commented Dec 3, 2011 at 7:02
  • Nevermind my question, nginx has a script here to start and stop fastCgi: wiki.nginx.org/PHPFcgiExample Commented Dec 4, 2011 at 7:08

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PHP-FPM is the fastcgi process manager (or something like that); it is a common way of keeping PHP processes alive while nginx restarts.

From the command line, ps aux will show you what's running; if this is a private / testing server, sudo kill <process id> on anything that has PHP in the name until all the old processes are dead (or as commented above, reboot the whole box); if it's a public / live server you may not want to be so reckless...

Also, /etc/php5/cli/conf.d/mcrypt.ini -- what about /etc/php/cgi/... if that exists?

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  • /etc/php/cgi/... doesn't exist, actually. Does this mean I'm missing something? When I do ps aux, I see 15+ instances of /usr/bin/php-cgi -b 127.0.0.1:9000 run by nginx. Is it safe to kill all of these? Commented Dec 1, 2011 at 17:28

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