Outputs information about PHP's configuration

# phpinfo

(PHP 4, PHP 5, PHP 7, PHP 8)

phpinfo — Outputs information about PHP's configuration

### Description

phpinfo(int `$flags` = `INFO_ALL`): true

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

`flags`

  The output may be customized by passing one or more of the following constants bitwise values summed together in the optional `flags` parameter. One can also combine the respective constants or bitwise values together with the bitwise or operator.

  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 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

Always returns `true`.

### 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.

### See Also

- phpversion() - Gets the current PHP version
- phpcredits() - Prints out the credits for PHP
- ini_get() - Gets the value of a configuration option
- ini_set() - Sets the value of a configuration option
- get_loaded_extensions() - Returns an array with the names of all modules compiled and loaded
- Predefined Variables

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