title: PHP: How to change PHP_INI_* mode
body: <p>I have a question about how to set <code>PHP_INI_*</code> modes and where to set them. I found this link about from <a href="http://php.net/manual/en/configuration.changes.modes.php" rel="nofollow noreferrer">http://php.net/manual/en/configuration.changes.modes.php</a>. It says there are mode <code>PHP_INI_USER</code>, <code>PHP_INI_ALL</code>, <code>PHP_INI_SYSTEM</code>, <code>PHP_INI_PERDIR</code>. The user notice above says that Apache have several directives to change <code>PHP_INI_*</code> mode configuration, but I can't find these directives in <code>httpd.conf</code>. Which Apache configuration files are they in? For example, can I change configuration mode from <code>PHP_INI_SYSTEM</code> to <code>PHP_INI_USER</code>? How can I do that?</p>