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# Data Handling

表格 H-4.Data Handling Configuration Options

Name | Default | Changeable
--- | --- | ---
track_vars | "On" | PHP_INI_??
arg_separator.output | "&" | PHP_INI_ALL
arg_separator.input | "&" | PHP_INI_SYSTEM|PHP_INI_PERDIR
variables_order | "EGPCS" | PHP_INI_ALL
register_globals | "Off" | PHP_INI_PERDIR|PHP_INI_SYSTEM
register_argc_argv | "On" | PHP_INI_PERDIR|PHP_INI_SYSTEM
register_long_arrays | "On" | PHP_INI_PERDIR|PHP_INI_SYSTEM
post_max_size | "8M" | PHP_INI_SYSTEM|PHP_INI_PERDIR
gpc_order | "GPC" | PHP_INI_ALL
auto_prepend_file | "" | PHP_INI_SYSTEM|PHP_INI_PERDIR
auto_append_file | "" | PHP_INI_SYSTEM|PHP_INI_PERDIR
default_mimetype | "text/html" | PHP_INI_ALL
default_charset | "iso-8859-1" | PHP_INI_ALL
always_populate_raw_post_data | "0" | PHP_INI_SYSTEM|PHP_INI_PERDIR
allow_webdav_methods | "0" | PHP_INI_SYSTEM|PHP_INI_PERDIR

這裡為簡短的結構指令說明。

track_vars boolean

  If enabled, then Environment, GET, POST, Cookie, and Server variables can be found in the global associative arrays $_ENV, $_GET, $_POST, $_COOKIE, and $_SERVER.

  Note that as of PHP 4.0.3, track_vars is always turned on.

arg_separator.output string

  The separator used in PHP generated URLs to separate arguments.

arg_separator.input string

  List of separator(s) used by PHP to parse input URLs into variables.

  > 備注: Every character in this directive is considered as separator!

variables_order string

  Set the order of the EGPCS (Environment, GET, POST, Cookie, Server) variable parsing. The default setting of this directive is "EGPCS". Setting this to "GP", for example, will cause PHP to completely ignore environment variables, cookies and server variables, and to overwrite any GET method variables with POST-method variables of the same name.

  See also register_globals.

register_globals boolean

  Tells whether or not to register the EGPCS (Environment, GET, POST, Cookie, Server) variables as global variables. For example; if register_globals = on, the URL http://www.example.com/test.php?id=3 will produce $id. Or, $DOCUMENT_ROOT from $_SERVER['DOCUMENT_ROOT']. You may want to turn this off if you don't want to clutter your scripts' global scope with user data. As of PHP 4.2.0, this directive defaults to off. It's preferred to go through PHP Predefined Variables instead, such as the superglobals: $_ENV, $_GET, $_POST, $_COOKIE, and $_SERVER. Please read the security chapter on Using register_globals for related information.

  Please note that register_globals cannot be set at runtime (ini_set()). Although, you can use `.htaccess` if your host allows it as described above. An example `.htaccess` entry: `php_flag register_globals on`.

  > 備注: register_globals is affected by the variables_order directive.

register_argc_argv boolean

  Tells PHP whether to declare the argv & argc variables (that would contain the GET information).

  See also command line. Also, this directive became available in PHP 4.0.0 and was always "on" before that.

register_long_arrays boolean

  Tells PHP whether or not to register the deprecated long $HTTP_*_VARS type predefined variables. When On (default), long predefined PHP variables like $HTTP_GET_VARS will be defined. If you're not using them, it's recommended to turn them off, for performance reasons. Instead, use the superglobal arrays, like $_GET.

  This directive became available in PHP 5.0.0.

post_max_size integer

  Sets max size of post data allowed. This setting also affects file upload. To upload large files, this value must be larger than upload_max_filesize.

  If memory limit is enabled by your configure script, memory_limit also affects file uploading. Generally speaking, memory_limit should be larger than post_max_size.

gpc_order string

  Set the order of GET/POST/COOKIE variable parsing. The default setting of this directive is "GPC". Setting this to "GP", for example, will cause PHP to completely ignore cookies and to overwrite any GET method variables with POST-method variables of the same name.

  > 備注: This option is not available in PHP 4. Use variables_order instead.

auto_prepend_file string

  Specifies the name of a file that is automatically parsed before the main file. The file is included as if it was called with the include() function, so include_path is used.

  The special value none disables auto-prepending.

auto_append_file string

  Specifies the name of a file that is automatically parsed after the main file. The file is included as if it was called with the include() function, so include_path is used.

  The special value none disables auto-appending.

  > 備注: If the script is terminated with exit(), auto-append will not occur.

default_mimetype string

default_charset string

  As of 4.0b4, PHP always outputs a character encoding by default in the Content-type: header. To disable sending of the charset, simply set it to be empty.

always_populate_raw_post_data boolean

  Always populate the $HTTP_RAW_POST_DATA variable.

allow_webdav_methods boolean

  Allow handling of WebDAV http requests within PHP scripts (eg. PROPFIND, PROPPATCH, MOVE, COPY, etc.). This directive does not exist as of PHP 4.3.2. If you want to get the post data of those requests, you have to set always_populate_raw_post_data as well.

See also: magic_quotes_gpc, magic_quotes_runtime, and magic_quotes_sybase.

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