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CXII. PHP Options&Information
This functions enable you to get a lot of information about PHP itself,
e.g. runtime configuration, loaded extensions, version and much more.
You'll also find functions to set options for your running PHP.
The probably best known function of PHP - phpinfo() -
can be found here.
Эти функции всегда доступны. Для использования этих функций не требуется проведение установки,
поскольку они являются частью ядра PHP.
Поведение этих функций зависит от установок в php.ini.
Таблица 1. PHP Options/Inf Configuration Options Name | Default | Changeable | Changelog |
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assert.active | "1" | PHP_INI_ALL | | assert.bail | "0" | PHP_INI_ALL | | assert.warning | "1" | PHP_INI_ALL | | assert.callback | NULL | PHP_INI_ALL | | assert.quiet_eval | "0" | PHP_INI_ALL | | enable_dl | "1" | PHP_INI_SYSTEM | | max_execution_time | "30" | PHP_INI_ALL | | max_input_time | "-1" | PHP_INI_PERDIR | Available since PHP 4.3.0. | magic_quotes_gpc | "1" | PHP_INI_PERDIR | PHP_INI_ALL in PHP <= 4.2.3. | magic_quotes_runtime | "0" | PHP_INI_ALL | |
Для подробного описания констант
PHP_INI_*, обратитесь к документации функции ini_set().
Краткое разъяснение конфигурационных
директив.
- assert.active
boolean
Enable assert() evaluation.
- assert.bail
boolean
Terminate script execution on failed assertions.
- assert.warning
boolean
Issue a PHP warning for each failed assertion.
- assert.callback
string
user function to call on failed assertions
- assert.quiet_eval
boolean
Use the current setting of error_reporting() during
assertion expression evaluation. If enabled, no errors are shown
(implicit error_reporting(0)) while evaluation. If disabled, errors are
shown according to the settings of error_reporting()
- enable_dl
boolean
This directive is really only useful in the Apache module
version of PHP. You can turn dynamic loading of
PHP extensions with dl() on and
off per virtual server or per directory.
The main reason for turning dynamic loading off is
security. With dynamic loading, it's possible to ignore all
open_basedir restrictions.
The default is to allow dynamic loading, except when using
безопасный режим. In безопасный режим, it's
always impossible to use dl().
- max_execution_time
integer
This sets the maximum time in seconds a script is allowed to
run before it is terminated by the parser. This helps
prevent poorly written scripts from tying up the server. The
default setting is 30.
The maximum execution time is not affected by system calls,
stream operations etc. Please see the
set_time_limit() function for more
details.
You can not change this setting with ini_set() when
running in безопасный режим. The only workaround is to turn off safe mode or
by changing the time limit in the php.ini.
Your webserver can have other timeouts. E.g. Apache has
Timeout directive, IIS has CGI timeout function, both
default to 300 seconds. See the webserver documentation for meaning of it.
- max_input_time
integer
This sets the maximum time in seconds a script is allowed to
receive input data, like POST, GET and file uploads.
- magic_quotes_gpc
boolean
Sets the magic_quotes state for GPC (Get/Post/Cookie)
operations. When magic_quotes are on, all ' (single-quote),
" (double quote), \ (backslash) and NUL's are escaped
with a backslash automatically.
Замечание:
If the
magic_quotes_sybase directive is also ON it will
completely override magic_quotes_gpc. Having both directives
enabled means only single quotes are escaped as
''. Double quotes, backslashes and
NUL's will remain untouched and unescaped.
See also get_magic_quotes_gpc()
- magic_quotes_runtime
boolean
If magic_quotes_runtime is enabled,
most functions that return data from any sort of external
source including databases and text files will have quotes
escaped with a backslash. If
magic_quotes_sybase
is also on, a single-quote is escaped with a single-quote instead
of a backslash.
Данное расширение не определяет никакие типы ресурсов.
Перечисленные ниже константы всегда доступны как часть ядра PHP.
Таблица 2. Pre-defined phpcredits() constants Constant | Value | Description |
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CREDITS_GROUP | 1 | A list of the core developers | CREDITS_GENERAL | 2 |
General credits: Language design and concept, PHP
authors and SAPI module.
| CREDITS_SAPI | 4 |
A list of the server API modules for PHP, and their authors.
| CREDITS_MODULES | 8 |
A list of the extension modules for PHP, and their authors.
| CREDITS_DOCS | 16 |
The credits for the documentation team.
| CREDITS_FULLPAGE | 32 |
Usually used in combination with the other flags. Indicates
that a complete stand-alone HTML page needs to be
printed including the information indicated by the other
flags.
| CREDITS_QA | 64 |
The credits for the quality assurance team.
| CREDITS_ALL | -1 |
All the credits, equivalent to using: CREDITS_DOCS +
CREDITS_GENERAL + CREDITS_GROUP + CREDITS_MODULES + CREDITS_QA
CREDITS_FULLPAGE. It generates a complete stand-alone HTML
page with the appropriate tags. This is the default value.
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Таблица 3. phpinfo() constants Constant | Value | Description |
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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.
| 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.
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