phpinfo

(PHP 4, PHP 5, PHP 7)

phpinfo — Outputs information about PHP's configuration

Description

bool phpinfo ([ int $what = INFO_ALL ] )

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.

phpinfo() is also a valuable debugging tool as it contains all EGPCS (Environment, GET, POST, Cookie, Server) data.

Parameters

what

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.

Name (constant)	Value	Description
INFO_GENERAL	1	The configuration line, php.ini location, build date, Web Server, System and more.
INFO_CREDITS	2	PHP 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. See also get_loaded_extensions().
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.

Return Values

Returns TRUE on success or FALSE on failure.

Changelog

Version	Description
5.5.0	Logo GUIDs were replaced with data URIs, and so turning off expose_php now has no effect on the result of phpinfo(). Credits are also now embedded within the output itself instead of linked.
5.2.2	The "Loaded Configuration File" information was added, when before only "Configuration File (php.ini) Path" existed.

Examples

Example #1 phpinfo() Example

<?php

//?Show?all?information,?defaults?to?INFO_ALL
phpinfo();

//?Show?just?the?module?information.
//?phpinfo(8)?yields?identical?results.
phpinfo(INFO_MODULES);

?>

Notes

Note: In versions of PHP before 5.5, 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.

Note: phpinfo() outputs plain text instead of HTML when using the CLI mode.