The configuration file (called
php3.ini in PHP 3.0, and simply
php.ini as of PHP 4.0) is read when PHP starts up. For
the server module versions of PHP, this happens only once
when the web server is started. For the CGI and CLI
version, it happens on every invocation.
The default location of
php.ini is a compile time option (see the FAQ
entry), but can be changed for the
CGI and CLI version
with the -c command line switch,
see the chapter about using PHP
from the command
line. You can also use the environment variable PHPRC for an additional path to search
for a php.ini file.
Not every PHP directive is documented below. For a
list of all directives, please read your well commented php.ini file. You may want to view
the latest php.ini here from CVS.
注: The default value for the PHP directive register_globals changed from on to off in PHP 4.2.0.