Requirements
in suse these functions are available through php5-posix package.
Installation
POSIX functions are enabled by default. You can disable POSIX-like functions with --disable-posix .
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User Contributed Notes
Installation
irithegreat at gmail dot com
27-Apr-2012 02:38
kamazee at gmail dot com
29-Feb-2012 09:26
Keep in mind that despite it's enabled as a built-in extension by default, in RPM-based distros (since Fedora 11, CentOS 6.0 in my case) php is compiled with --enable-posix=shared and posix extension is provided by php-process package, which is kind of not obvious.
Related question at stackoverflow: http://stackoverflow.com/questions/1008436/how-does-one-easily-add-posix-support-to-php-using-yum