Description
int
phpinfo ( [int what])
Outputs a large amount of information about the current state of
PHP. This includes information about PHP compilation options and
extensions, the PHP version, server information and environment
(if compiled as a module), the PHP environment, OS version
information, paths, master and local values of configuration
options, HTTP headers, and the PHP License.
Because every system is setup differently,
phpinfo() is commonly used to check configuration settings and for
available predefined
variables on a given system. Also,
phpinfo() is a valuable debugging tool as it
contains all EGPCS (Environment, GET, POST, Cookie, Server) data.
The output may be customized by passing one or more of the
following constants bitwise values summed
together in the optional what parameter.
One can also combine the respective constants or bitwise values
together with the or operator.
Table 1. phpinfo() options
| Name (constant) | Value | Description |
|---|
| INFO_GENERAL | 1 |
The configuration line, php.ini location, build date, Web
Server, System and more.
|
| INFO_CREDITS | 2 |
PHP 4 Credits. See also phpcredits().
|
| INFO_CONFIGURATION | 4 |
Current Local and Master values for php directives. See
also ini_get().
|
| INFO_MODULES | 8 |
Loaded modules and their respective settings.
|
| INFO_ENVIRONMENT | 16 |
Environment Variable information that's also available in
$_ENV.
|
| INFO_VARIABLES | 32 |
Shows all
predefined variables from EGPCS (Environment, GET,
POST, Cookie, Server).
|
| INFO_LICENSE | 64 |
PHP License information. See also the license faq.
|
| INFO_ALL | -1 |
Shows all of the above. This is the default value.
|
Example 1. phpinfo() examples <?php
// Show all information, defaults to INFO_ALL
phpinfo();
// Show just the module information.
// phpinfo(8) yields identical results.
phpinfo(INFO_MODULES);
?> |
|
Note:
Parts of the information displayed are disabled when the
expose_php configuration setting is set to
off. This includes the PHP and Zend logos,
and the credits.
See also: phpversion(),
phpcredits(),
php_logo_guid(), ini_get(),
ini_set(), and the section on Predefined
Variables.
