PHP. Руководство по PHP. 2005

PHP Options&Information

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LVI. PHP Options&Information

Введение

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.

Требования

Эти функции всегда доступны.

Установка

Для использования этих функций не требуется проведение установки,

поскольку они являются частью ядра PHP.

Настройка во время выполнения

-Поведение этих функций зависит от установок в php.ini.

Таблица 1. PHP Options/Inf Configuration Options

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.

Типы ресурсов

Данное расширение не определяет никакие типы ресурсов.

Предопределенные константы

-Перечисленные ниже константы всегда доступны как часть ядра PHP.

Таблица 2. Pre-defined phpcredits() constants

Таблица 3. phpinfo() constants

ASSERT_ACTIVE (integer)

ASSERT_CALLBACK (integer)

ASSERT_BAIL (integer)

ASSERT_WARNING (integer)

ASSERT_QUIET_EVAL (integer)

Содержание

assert_options -- Set/get the various assert flags

assert -- Checks if assertion is FALSE

dl -- Loads a PHP extension at runtime

extension_loaded -- Find out whether an extension is loaded

get_cfg_var -- Gets the value of a PHP configuration option

get_current_user -- Gets the name of the owner of the current PHP script

get_defined_constants -- Returns an associative array with the names of all the constants and their values

get_extension_funcs -- Returns an array with the names of the functions of a module

get_include_path -- Gets the current include_path configuration option

get_included_files -- Returns an array with the names of included or required files

get_loaded_extensions -- Returns an array with the names of all modules compiled and loaded

get_magic_quotes_gpc -- Gets the current configuration setting of magic quotes gpc

get_magic_quotes_runtime -- Gets the current active configuration setting of magic_quotes_runtime

get_required_files -- Alias of get_included_files()

getenv -- Gets the value of an environment variable

getlastmod -- Gets time of last page modification

getmygid -- Get PHP script owner's GID

getmyinode -- Gets the inode of the current script

getmypid -- Gets PHP's process ID

getmyuid -- Gets PHP script owner's UID

getopt -- Gets options from the command line argument list

getrusage -- Gets the current resource usages

ini_alter -- Alias of ini_set()

ini_get_all -- Gets all configuration options

ini_get -- Gets the value of a configuration option

ini_restore -- Restores the value of a configuration option

ini_set -- Sets the value of a configuration option

main -- Dummy for main()

memory_get_usage -- Returns the amount of memory allocated to PHP

php_ini_scanned_files -- Return a list of .ini files parsed from the additional ini dir

php_logo_guid -- Gets the logo guid

php_sapi_name -- Returns the type of interface between web server and PHP

php_uname -- Returns information about the operating system PHP is running on

phpcredits -- Prints out the credits for PHP

phpinfo -- Outputs lots of PHP information

phpversion -- Gets the current PHP version

putenv -- Sets the value of an environment variable

restore_include_path -- Restores the value of the include_path configuration option

set_include_path -- Sets the include_path configuration option

set_magic_quotes_runtime -- Sets the current active configuration setting of magic_quotes_runtime

set_time_limit -- Limits the maximum execution time

version_compare -- Compares two "PHP-standardized" version number strings

zend_logo_guid -- Gets the Zend guid

zend_version -- Gets the version of the current Zend engine

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