Ini/core-Phpdoc专题
php.ini
核心配置选项说明
该列表只包含核心的 php.ini
配置选项。扩展的配置选项在各个扩展的文档页面分别被描述。比如,有关
session 的选项可以在
sessions 页面找到。
Note:
以下列出了未设置
php.ini
时的默认值;开发环境和生产环境的php.ini
值可能会有所不同。
语言选项
名字 | 默认 | 可修改范围 | 更新日志 |
---|---|---|---|
short_open_tag | "1" | PHP_INI_PERDIR | |
asp_tags | "0" | PHP_INI_PERDIR | PHP 7.0.0. 中移除。 |
precision | "14" | PHP_INI_ALL | |
serialize_precision | "-1" | PHP_INI_ALL | 在 PHP 5.3.6 以前,默认值为 100。 在 PHP 7.1.0 以前,默认值为 17。 |
y2k_compliance | "1" | PHP_INI_ALL | 在 PHP 5.4.0 中移除该选项。 |
allow_call_time_pass_reference | "1" | PHP_INI_PERDIR | 在 PHP 5.4.0 中移除该选项。 |
disable_functions | "" | 仅仅为 PHP_INI_SYSTEM | |
disable_classes | "" | 仅仅为 php.ini |
|
exit_on_timeout | "" | PHP_INI_ALL | 从 PHP 5.3.0 起可用。 |
expose_php | "1" | php.ini only |
|
hard_timeout | "2" | PHP_INI_SYSTEM | 从 PHP 7.1.0 起可用 |
zend.exception_ignore_args | "0" | PHP_INI_ALL | 从 PHP 7.4.0 起可用 |
zend.multibyte | "0" | PHP_INI_ALL | 从 PHP 5.4.0 起可用 |
zend.script_encoding | NULL | PHP_INI_ALL | 从 PHP 5.4.0 起可用 |
zend.detect-unicode | NULL | PHP_INI_ALL | 从 PHP 5.4.0 起可用 |
zend.signal_check | "0" | PHP_INI_SYSTEM | 从 PHP 5.4.0 起可用 |
zend.assertions | "1" | PHP_INI_ALL | 从 PHP 7.0.0 起可用 |
zend.ze1_compatibility_mode | "0" | PHP_INI_ALL | 在 PHP 5.3.0 中移除该选项 |
detect_unicode | "1" | PHP_INI_ALL | 从 PHP 5.1.0起可用。 PHP 5.4.0 起重命名为 zend.detect-unicode。 |
这是配置指令的简短说明。
short_open_tag
boolean
决定是否允许使用 PHP
代码开始标志的缩写形式(<? ?>
)。如果要和 XML 结合使用
PHP,可以禁用此选项以便于嵌入使用 <?xml ?>
。否则还可以通过 PHP
来输出,例如:<?php echo '<?xml version="1.0"'; ?>
。如果禁用了,必须使用
PHP 代码开始标志的完整形式(<?php ?>
)。
Note:
本指令也会影响到缩写形式
<?=
,它和<? echo
等价。使用此缩写需要short_open_tag
的值为 On。 从 PHP 5.4.0 起,<?=
总是可用的。
asp_tags
boolean
除了通常的 \<?php ?> 标志之外还允许使用 ASP
风格的标志 \<% %>。这也包括了输出变量值的缩写 \<%= $value
%>。更多信息见从 HTML 中分离一节。
版本 | 说明 |
---|---|
7.0.0 | 从 PHP 中移除。 |
precision
integer
浮点数中显示有效数字的位数。-1 means that an
enhanced algorithm for rounding such numbers will be used.
serialize_precision
integer
The number of significant digits stored while
serializing floating point numbers. -1 means that an enhanced
algorithm for rounding such numbers will be used.
y2k_compliance
boolean
强制 2000 年兼容(在不兼容的浏览器中会出问题)。
allow_call_time_pass_reference
boolean
在函数调用时参数被按照引用传递时是否发出警告。此方法已不被赞成并在
PHP/Zend
未来的版本中很可能不再支持。鼓励使用的方法是在函数定义中指定哪些参数应该用引用传递。鼓励大家尝试关闭此选项并确保脚本能够正常运行,以确保该脚本也能在未来的版本中运行(每次使用此特性都会收到一条警告)。
在函数调用时通过引用传递参数是不推荐的,因为它影响到了代码的整洁。如果函数的参数没有声明作为引用传递,函数可以通过未写入文档的方法修改其参数。要避免其副作用,最好仅在函数声明时指定那个参数需要通过引用传递。
参见引用的解释。
版本 | 说明 |
---|---|
5.4.0 | 从 PHP 中移除。 |
5.3.0 | Emits an E_DEPRECATED level error. |
5.0.0 | Deprecated, and generates an E_COMPILE_WARNING level error. |
expose_php
boolean
决定是否暴露 PHP 被安装在服务器上(例如在 Web
服务器的信息头中加上其签名:X-Powered-By: PHP/5.3.7)。 在 PHP 5.5.0
之前,PHP 徽标指南也是公开的,因此将它们追加到 PHP 脚本的 URL
中就会显示相应的徽标(例如,
» https://www.php.net/?=PHPE9568F34-D428-11d2-A769-00AA001ACF42)。这也影响了
phpinfo 的输出,因为当禁用时,PHP
的标志和信用信息将无法显示。
Note:
从 PHP 5.5.0 开始,这些 guid 和 <span class="function">php_logo_guid 函数已从 PHP 中删除,guid 被替换为数据 URI。 因此,通过在 URL 中添加 guid 来访问 PHP 徽标不再有效。 同样,关闭
expose_php
参数不会影响到在 <span class="function">phpinfo 中看到 PHP 标志。
See also php_logo_guid and <span class="function">phpcredits.
disable_functions
string
本指令可用于禁止某些函数。接受逗号分隔的函数名列表作为参数。
本指令只能设置在 php.ini
中。例如,无法在 httpd.conf
中设置。
disable_classes
string
本指令可以使你禁用某些类。用逗号分隔类名。
本指令只能设置在 php.ini
中。例如不能将其设置在 httpd.conf
。
zend.assertions
integer
When set to 1, assertion code will be generated
and executed (development mode). When set to 0, assertion code will be
generated but it will be skipped (not executed) at runtime. When set to
-1, assertion code will not be generated, making the assetions
zero-cost (production mode).
Note:
If a process is started in production mode, zend.assertions cannot be changed at runtime, since the code for assertions was not generated.
If a process is started in development mode, zend.assertions cannot be set to -1 at runtime.
zend.ze1_compatibility_mode
boolean
Enable compatibility mode with Zend Engine 1 (PHP 4). It affects the
cloning, casting (objects with no properties cast to false
or 0),
and
comparing of objects.
In this mode, objects are passed by value instead of reference by
default.
See also the section titled Migrating from PHP 4 to PHP 5.
Warning This feature has been DEPRECATED and REMOVED as of PHP 5.3.0.
hard_timeout
integer
zend.exception_ignore_args
boolean
从异常产生的堆栈中排除参数。
zend.multibyte
boolean
启用多字节编码的源文件解析功能。启用 zend.multibyte 是使用 SJIS、BIG5
等在多字节字符串数据中包含特殊字符的字符编码所必需的。ISO-8859-1
兼容的编码,如 UTF-8、EUC 等,则不需要这个选项。
启用 zend.multibyte 需要 mbstring 扩展可用。
zend.script_encoding
string
This value will be used unless a
declare(encoding=...)
directive appears at the top of the script. When ISO-8859-1 incompatible
encoding is used, both zend.multibyte and zend.script_encoding must be
used.
Literal strings will be transliterated from zend.script_enconding to mbstring.internal_encoding, as if <span class="function">mb_convert_encoding would have been called.
zend.detect_unicode
boolean
Check for BOM (Byte Order Mark) and see if the file contains valid
multibyte characters. This detection is performed before processing of
__halt_compiler. Available only in Zend
Multibyte mode.
zend.signal_check
boolean
To check for replaced signal handlers on shutdown.
exit_on_timeout
boolean
这是一个用于 Apache 1 的 mod_php-only 指令,如果 PHP 执行超时,会强制
Apache 子程序退出.这样的超时会导致 Apache 1 内部的 longjmp()
调用,从而使一些扩展处于不一致的状态。通过终止进程,任何未完成的锁或内存将被清理。
资源限制
名字 | 默认 | 可修改范围 | 更新日志 |
---|---|---|---|
memory_limit | "128M" | PHP_INI_ALL | PHP 5.2.0 之前默认为 "8M",之后默认为 "16M" |
这是配置指令的简短说明。
memory_limit
integer
设置了一个脚本允许分配的最大内存量,以字节(bytes)为单位。这有助于防止写得不好的脚本吃掉服务器上所有可用的内存。请注意,如果不需要内存限制,请将此指令设置为
-1。
在 PHP 5.2.1 之前的版本,如果要使用这个指令,必须在编译时使用 --enable-memory-limit 参数。在 PHP 5.2.1 之前,如果想要使用函数 memory_get_usage 和 <span class="function">memory_get_peak_usage,也会需要这个编译参数。
当使用 int 时, 其值以字节来衡量。还可以使用在FAQ中描述的速记符。
请参阅:max_execution_time。
性能调整
名字 | 默认 | 可修改范围 | 更新日志 |
---|---|---|---|
realpath_cache_size | "4M" | PHP_INI_SYSTEM | PHP 5.1.0 起加入,PHP 7.0.16 和 7.1.2 之前,默认值为 "16K" |
realpath_cache_ttl | "120" | PHP_INI_SYSTEM | 从 PHP 5.1.0 起可用。 |
Note:
启用 open_basedir 将会 禁用 realpath cache。
这是配置指令的简短说明。
realpath_cache_size
integer
设定 PHP 使用的 realpath 缓存的大小。在 PHP
打开很多文件的系统中,这个值应该增加,以优化文件操作的数量。
这里的大小表示存储的路径字符串的总字节数,加上与缓存条目相关的数据大小。这意味着,为了在缓存中存储更长的路径,缓存大小必须更大。这个值不直接控制可以缓存的不同路径的数量。
缓存输入数据所需的大小取决于操作系统。
realpath_cache_ttl
integer
缓存给定文件或目录的真实路径信息的持续时间(以秒为单位)。对于很少改变文件的系统,可以考虑增加该值。
数据处理
名字 | 默认 | 可修改范围 | 更新日志 |
---|---|---|---|
arg_separator.output | "&" | PHP_INI_ALL | |
arg_separator.input | "&" | PHP_INI_PERDIR | |
variables_order | "EGPCS" | PHP_INI_PERDIR | PHP \<= 5.0.5 可用。 |
request_order | "" | PHP_INI_PERDIR | 从 PHP 5.3.0 起可用。 |
auto_globals_jit | "1" | PHP_INI_PERDIR | 从 PHP 5.0.0 起可用。 |
register_globals | "0" | PHP_INI_PERDIR | PHP 5.4.0 版本被移除。 |
register_argc_argv | "1" | PHP_INI_PERDIR | |
register_long_arrays | "1" | PHP_INI_PERDIR | PHP 5.3.0 中被废弃,PHP 5.4.0 中被移除。 |
enable_post_data_reading | "1" | PHP_INI_PERDIR | 从 PHP 5.4.0 起可用。 |
post_max_size | "8M" | PHP_INI_PERDIR | |
auto_prepend_file | NULL | PHP_INI_PERDIR | |
auto_append_file | NULL | PHP_INI_PERDIR | |
default_mimetype | "text/html" | PHP_INI_ALL | |
default_charset | "UTF-8" | PHP_INI_ALL | PHP >= 5.6.0 开始默认为 "UTF-8";PHP \< 5.6.0 为空。 |
always_populate_raw_post_data | "0" | PHP_INI_PERDIR | PHP 7.0.0 中被移除。 |
这是配置指令的简短说明。
arg_separator.output
string
在 PHP 生成的 URL 中用来分隔参数的分隔符。
arg_separator.input
string
PHP 用于将输入的 URL 解析为变量的分隔符列表。
Note:
本指令中的每一个字符都被视为分隔符!
variables_order
string
Sets the order of the EGPCS (Environment, Get, Post, Cookie, and
Server) variable parsing. For example, if variables_order is set to
"SP" then PHP will create the
superglobals
$_SERVER
and $_POST
, but not create $_ENV
, $_GET
, and
$_COOKIE
. Setting to "" means no
superglobals
will be set.
If the deprecated
register_globals
directive is on, then variables_order also configures the order the
ENV, GET, POST, COOKIE and SERVER variables are populated in
global scope. So for example if variables_order is set to "EGPCS",
register_globals is enabled, and both $_GET['action']
and
$_POST['action']
are set, then $action
will contain the value of
$_POST['action']
as P comes after G in our example directive
value.
Warning
In both the CGI and FastCGI SAPIs, $_SERVER
is also populated by
values from the environment; S is always equivalent to ES regardless
of the placement of E elsewhere in this directive.
Note:
The content and order of
$_REQUEST
is also affected by this directive.
request_order
string
This directive describes the order in which PHP registers GET, POST and
Cookie variables into the _REQUEST array. Registration is done from
left to right, newer values override older values.
If this directive is not set,
variables_order
is used for $_REQUEST
contents.
Note that the default distribution php.ini
files does not contain the
'C' for cookies, due to security concerns.
auto_globals_jit
boolean
When enabled, the SERVER, REQUEST, and ENV variables are created when
they're first used (Just In Time) instead of when the script starts. If
these variables are not used within a script, having this directive on
will result in a performance gain.
The PHP directives register_globals, register_long_arrays, and register_argc_argv must be disabled for this directive to have any affect. Since PHP 5.1.3 it is not necessary to have register_argc_argv disabled.
Warning Usage of SERVER, REQUEST, and ENV variables is checked during the compile time so using them through e.g. variable variables will not cause their initialization.
register_globals
boolean
Whether or not to register the EGPCS (Environment, GET, POST, Cookie,
Server) variables as global variables.
As of » PHP 4.2.0, this directive defaults to off.
Please read the security chapter on Using register_globals for related information.
Please note that register_globals
cannot be set at runtime (<span
class="function">ini_set). Although, you can use .htaccess
if
your host allows it as described above. An example .htaccess
entry:
php_flag register_globals off
.
Note:
register_globals
is affected by the variables_order directive.
Warning 本特性已自 PHP 5.3.0 起废弃并将自 PHP 5.4.0 起移除。
register_argc_argv
boolean
Tells PHP whether to declare the argv & argc
variables (that would contain the GET information). <span
class="simpara"> See also
command line.
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.
Warning 本特性已自 PHP 5.3.0 起废弃并将自 PHP 5.4.0 起移除。
enable_post_data_reading
boolean
Disabling this option causes $_POST
and
$_FILES
not to be populated. The only way to read postdata will then
be through the php://input
stream wrapper. This can be useful to proxy requests or to process the
POST data in a memory efficient fashion.
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.
Generally speaking,
memory_limit
should be larger than post_max_size
. <span
class="simpara">当使用 int 时,
其值以字节来衡量。还可以使用在FAQ中描述的速记符。
If the size of post data is greater than
post_max_size, the $_POST
and $_FILES
superglobals
are empty. This can be tracked in various ways, e.g. by passing the
$_GET
variable to the script processing the data, i.e. \<form
action="edit.php?processed=1">, and then checking if
$_GET['processed']
is set.
Note:
PHP allows shortcuts for byte values, including K (kilo), M (mega) and G (giga). PHP will do the conversions automatically if you use any of these. Be careful not to exceed the 32 bit signed integer limit (if you're using 32bit versions) as it will cause your script to fail.
版本 | 说明 |
---|---|
5.3.4 | post_max_size = 0 will not disable the limit when the content type is application/x-www-form-urlencoded or is not registered with PHP. |
5.3.2 , 5.2.12 | Allow unlimited post size by setting post_max_size to 0. |
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 <span
class="function">require 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 <span
class="function">require function, so
include_path
is used.
The special value none disables auto-appending.
Note: If the script is terminated with exit, auto-append will not occur.
default_mimetype
string
By default, PHP will output a media type using the Content-Type header.
To disable this, simply set it to be empty.
PHP's built-in default media type is set to text/html.
default_charset
string
In PHP 5.6 onwards, "UTF-8" is the default value and its value is used
as the default character encoding for <span
class="function">htmlentities, <span
class="function">html_entity_decode and <span
class="function">htmlspecialchars if the encoding
parameter is
omitted. The value of default_charset
will also be used to set the
default character set for
iconv functions if the
iconv.input_encoding
,
iconv.output_encoding
and
iconv.internal_encoding
configuration options are unset, and for
mbstring functions if the
mbstring.http_input
mbstring.http_output
mbstring.internal_encoding
configuration option is unset.
All versions of PHP will use this value as the charset within the default Content-Type header sent by PHP if the header isn't overridden by a call to header.
Setting default_charset
to an empty value is not recommended.
input_encoding
string
Available from PHP 5.6.0. This setting is used for multibyte modules
such as mbstring and iconv. Default is empty.
output_encoding
string
Available from PHP 5.6.0. This setting is used for multibyte modules
such as mbstring and iconv. Default is empty.
internal_encoding
string
Available from PHP 5.6.0. This setting is used for multibyte modules
such as mbstring and iconv. Default is empty. If empty,
default_charset
is used.
always_populate_raw_post_data
mixed
Warning
该功能已在 PHP 5.6.0 中 废弃 ,并在 PHP 7.0.0 中 移除。
If set to true
, PHP will always populate the $HTTP_RAW_POST_DATA
containing the raw POST data. Otherwise, the variable is populated only
when the MIME type of the data is unrecognised.
The preferred method for accessing raw POST data is
php://input, and
$HTTP_RAW_POST_DATA
is deprecated in PHP 5.6.0 onwards. Setting
always_populate_raw_post_data
to -1 will opt into the new behaviour
that will be implemented in a future version of PHP, in which
$HTTP_RAW_POST_DATA
is never defined.
Regardless of the setting, $HTTP_RAW_POST_DATA
is not available with
enctype="multipart/form-data".
See also: magic_quotes_gpc, magic_quotes_runtime, and magic_quotes_sybase.
Paths and Directories
名字 | 默认 | 可修改范围 | 更新日志 |
---|---|---|---|
include_path | ".;/path/to/php/pear" | PHP_INI_ALL | |
open_basedir | NULL | PHP_INI_ALL | PHP_INI_SYSTEM in PHP \< 5.3.0 |
doc_root | NULL | PHP_INI_SYSTEM | |
user_dir | NULL | PHP_INI_SYSTEM | |
user_ini.cache_ttl | "300" | PHP_INI_SYSTEM | Available since PHP 5.3.0. |
user_ini.filename | ".user.ini" | PHP_INI_SYSTEM | Available since PHP 5.3.0. |
extension_dir | "/path/to/php" | PHP_INI_SYSTEM | |
extension | NULL | php.ini only |
|
zend_extension | NULL | php.ini only |
|
zend_extension_debug | NULL | php.ini only |
Available before PHP 5.3.0. |
zend_extension_debug_ts | NULL | php.ini only |
Available before PHP 5.3.0. |
zend_extension_ts | NULL | php.ini only |
Available before PHP 5.3.0. |
cgi.check_shebang_line | "1" | PHP_INI_SYSTEM | Available since PHP 5.2.0. |
cgi.discard_path | "0" | PHP_INI_SYSTEM | Available since PHP 5.3.0. |
cgi.fix_pathinfo | "1" | PHP_INI_SYSTEM | PHP_INI_ALL prior to PHP 5.2.1. |
cgi.force_redirect | "1" | PHP_INI_SYSTEM | PHP_INI_ALL prior to PHP 5.2.1. |
cgi.nph | "0" | PHP_INI_SYSTEM | Available since PHP 5.3.0. |
cgi.redirect_status_env | NULL | PHP_INI_SYSTEM | PHP_INI_ALL prior to PHP 5.2.1. |
cgi.rfc2616_headers | "0" | PHP_INI_ALL | |
fastcgi.impersonate | "0" | PHP_INI_SYSTEM | PHP_INI_ALL prior to PHP 5.2.1. |
fastcgi.logging | "1" | PHP_INI_SYSTEM | PHP_INI_ALL prior to PHP 5.2.1. |
这是配置指令的简短说明。
include_path
string
Specifies a list of directories where the <span
class="function">require, include,
fopen, file,
readfile and <span
class="function">file_get_contents functions look for files.
The format is like the system's PATH
environment variable: a list of
directories separated with a colon in Unix or semicolon in Windows.
PHP considers each entry in the include path separately when looking for
files to include. It will check the first path, and if it doesn't find
it, check the next path, until it either locates the included file or
returns with an E_WARNING
or an E_ERROR
. You may modify or
set your include path at runtime using <span
class="function">set_include_path.
示例 #1 Unix include_path
include_path=".:/php/includes"
示例 #2 Windows include_path
include_path=".;c:\php\includes"
Using a . in the include path allows for relative includes as it means the current directory. However, it is more efficient to explicitly use include './file' than having PHP always check the current directory for every include.
Note:
ENV variables are also accessible in .ini files. As such it is possible to reference the home directory using ${LOGIN} and ${USER}.
Environment variables may vary between Server APIs as those environments may be different.
示例 #3 Unix include_path using ${USER} env variable
include_path = ".:${USER}/pear/php"
open_basedir
string
Limit the files that can be accessed by PHP to the specified
directory-tree, including the file itself. This directive is NOT
affected by whether Safe Mode is turned On or Off.
When a script tries to access the filesystem, for example using <span class="function">include, or fopen, the location of the file is checked. When the file is outside the specified directory-tree, PHP will refuse to access it. All symbolic links are resolved, so it's not possible to avoid this restriction with a symlink. If the file doesn't exist then the symlink couldn't be resolved and the filename is compared to (a resolved) open_basedir.
open_basedir can affect more than just filesystem functions; for example if MySQL is configured to use mysqlnd drivers, LOAD DATA INFILE will be affected by open_basedir. Much of the extended functionality of PHP uses open_basedir in this way.
The special value .
indicates that the working directory of the script
will be used as the base-directory. This is, however, a little dangerous
as the working directory of the script can easily be changed with <span
class="function">chdir.
In httpd.conf
, open_basedir can be turned off (e.g. for some
virtual hosts)
the same way
as any other configuration directive with "php_admin_value
open_basedir none".
Under Windows, separate the directories with a semicolon. On all other systems, separate the directories with a colon. As an Apache module, open_basedir paths from parent directories are now automatically inherited.
The restriction specified with open_basedir is a directory name since PHP 5.2.16 and 5.3.4. Previous versions used it as a prefix. This means that "open_basedir = /dir/incl" also allowed access to "/dir/include" and "/dir/incls" if they exist. When you want to restrict access to only the specified directory, end with a slash. For example: open_basedir = /dir/incl/
The default is to allow all files to be opened.
Note:
As of PHP 5.3.0 open_basedir can be tightened at run-time. This means that if open_basedir is set to /www/ in
php.ini
a script can tighten the configuration to /www/tmp/ at run-time with <span class="function">ini_set. When listing several directories, you can use thePATH_SEPARATOR
constant as a separator regardless of the operating system.
Note:
Using open_basedir will set realpath_cache_size to 0 and thus disable the realpath cache.
doc_root
string
PHP's "root directory" on the server. Only used if non-empty. If PHP was
not compiled with FORCE_REDIRECT, you should set doc_root if you are
running PHP as a CGI under any web server (other than IIS). The
alternative is to use the
cgi.force_redirect
configuration below.
user_ini.cache_ttl
integer
user_ini.filename
string
user_dir
string
The base name of the directory used on a user's home directory for PHP
files, for example public_html
.
extension_dir
string
In what directory PHP should look for dynamically loadable extensions.
See also: enable_dl, and
dl.
extension
string
Which dynamically loadable extensions to load when PHP starts up.
zend_extension
string
Name of dynamically loadable Zend extension (for example XDebug) to load
when PHP starts up.
zend_extension_debug
string
Variant of
zend_extension
for extensions compiled with debug info prior to PHP 5.3.0.
zend_extension_debug_ts
string
Variant of
zend_extension
for extensions compiled with debug info and thread safety prior to PHP
5.3.0.
zend_extension_ts
string
Variant of
zend_extension
for extensions compiled with thread safety prior to PHP 5.3.0.
cgi.check_shebang_line
boolean
Controls whether CGI PHP checks for line starting with #! (shebang)
at the top of the running script. This line might be needed if the
script support running both as stand-alone script and via PHP CGI. PHP
in CGI mode skips this line and ignores its content if this directive is
turned on.
cgi.discard_path
boolean
If this is enabled, the PHP CGI binary can safely be placed outside of
the web tree and people will not be able to circumvent .htaccess
security.
cgi.fix_pathinfo
boolean
Provides real PATH_INFO/ PATH_TRANSLATED support for CGI. PHP's
previous behaviour was to set PATH_TRANSLATED to SCRIPT_FILENAME,
and to not grok what PATH_INFO is. For more information on
PATH_INFO, see the CGI specs. Setting this to 1 will cause PHP CGI
to fix its paths to conform to the spec. A setting of zero causes PHP to
behave as before. It is turned on by default. You should fix your
scripts to use SCRIPT_FILENAME rather than PATH_TRANSLATED.
cgi.force_redirect
boolean
cgi.force_redirect is necessary to provide security running PHP as a
CGI under most web servers. Left undefined, PHP turns this on by
default. You can turn it off at your own risk.
Note:
Windows Users: When using IIS this option must be turned off. For OmniHTTPD or Xitami the same applies.
cgi.nph
boolean
If cgi.nph is enabled it will force cgi to always sent Status: 200 with
every request.
cgi.redirect_status_env
string
If cgi.force_redirect is turned on, and you are not running under
Apache or Netscape (iPlanet) web servers, you may need to set an
environment variable name that PHP will look for to know it is OK to
continue execution.
Note:
Setting this variable may cause security issues, know what you are doing first.
cgi.rfc2616_headers
int
Tells PHP what type of headers to use when sending HTTP response code.
If it's set to 0, PHP sends a
» RFC 3875
"Status:" header that is supported by Apache and other web servers. When
this option is set to 1, PHP will send
» RFC 2616
compliant headers.
If this option is enabled, and you are running PHP in a CGI environment (e.g. PHP-FPM) you should not use standard RFC 2616 style HTTP status response headers, you should instead use their RFC 3875 equivalent e.g. instead of header("HTTP/1.0 404 Not found"); you should use header("Status: 404 Not Found");
Leave it set to 0 unless you know what you're doing.
fastcgi.impersonate
string
FastCGI under IIS (on WINNT based OS) supports the ability to
impersonate security tokens of the calling client. This allows IIS to
define the security context that the request runs under. mod_fastcgi
under Apache does not currently support this feature (03/17/2002) Set to
1 if running under IIS. Default is zero.
fastcgi.logging
boolean
Turns on SAPI logging when using FastCGI. Default is to enable logging.
File Uploads
名字 | 默认 | 可修改范围 | 更新日志 |
---|---|---|---|
file_uploads | "1" | PHP_INI_SYSTEM | |
upload_tmp_dir | NULL | PHP_INI_SYSTEM | |
max_input_nesting_level | 64 | PHP_INI_PERDIR | Available since PHP 5.3.9. |
max_input_vars | 1000 | PHP_INI_PERDIR | Available since PHP 5.3.9. |
upload_max_filesize | "2M" | PHP_INI_PERDIR | |
max_file_uploads | 20 | PHP_INI_SYSTEM | Available since PHP 5.2.12. |
这是配置指令的简短说明。
file_uploads
boolean
Whether or not to allow HTTP
file uploads. See
also the
upload_max_filesize,
upload_tmp_dir,
and
post_max_size
directives.
upload_tmp_dir
string
The temporary directory used for storing files when doing file upload.
Must be writable by whatever user PHP is running as. If not specified
PHP will use the system's default.
If the directory specified here is not writable, PHP falls back to the system default temporary directory. If open_basedir is on, then the system default directory must be allowed for an upload to succeed.
upload_max_filesize
integer
The maximum size of an uploaded file.
当使用 int 时, 其值以字节来衡量。还可以使用在FAQ中描述的速记符。
max_file_uploads
integer
The maximum number of files allowed to be uploaded simultaneously.
Starting with PHP 5.3.4, upload fields left blank on submission do not
count towards this limit.
General SQL
名字 | 默认 | 可修改范围 | 更新日志 |
---|---|---|---|
sql.safe_mode | "0" | PHP_INI_SYSTEM | Removed in PHP 7.2.0 |
这是配置指令的简短说明。
sql.safe_mode
boolean
If turned on, database connection functions that specify default values
will use those values in place of any user-supplied arguments. For
details on the default values, see the documentation for the relevant
connection functions.
Warning This feature has been REMOVED as of PHP 7.2.0.
Windows Specific
名字 | 默认 | 可修改范围 | 更新日志 |
---|---|---|---|
windows.show_crt_warning | "0" | PHP_INI_ALL | Available since PHP 5.4.0. |
这是配置指令的简短说明。
windows.show_crt_warning
boolean
This directive shows the Windows CRT warnings when enabled. These
warnings were displayed by default until PHP 5.4.0.