phpinfo
(PHP 4, PHP 5)
phpinfo — Outputs lots of PHP information
说明
bool 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.
phpinfo() is also a valuable debugging tool as it
contains all EGPCS (Environment, GET, POST, Cookie, Server) data.
参数
-
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.
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. This is the default value.
|
返回值
如果成功则返回 TRUE，失败则返回 FALSE。
范例
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);
?>
注释
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.
Note:
phpinfo() outputs plain text instead of HTML when
using the CLI mode.