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php.ini 文件中配置的意义注释

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;;;;;;;;;;;;;;;;;;;
; About php.ini   ;  //关于php
;;;;;;;;;;;;;;;;;;;
; PHP‘s initialization file, generally called php.ini, is responsible for
; configuring many of the aspects of PHP‘s behavior.                      //这个是php初始化文件,通常称为php.ini,负责各个方面php行为的配置。

; PHP attempts to find and load this configuration from a number of locations.
; The following is a summary of its search order:
; 1. SAPI module specific location.
; 2. The PHPRC environment variable. (As of PHP 5.2.0)
; 3. A number of predefined registry keys on Windows (As of PHP 5.2.0)
; 4. Current working directory (except CLI)
; 5. The web server‘s directory (for SAPI modules), or directory of PHP
; (otherwise in Windows)
; 6. The directory from the --with-config-file-path compile time option, or the
; Windows directory (C:\windows or C:\winnt)
; See the PHP docs for more specific information.
; http://php.net/configuration.file

; The syntax of the file is extremely simple.  Whitespace and lines
; beginning with a semicolon are silently ignored (as you probably guessed).
; Section headers (e.g. [Foo]) are also silently ignored, even though
; they might mean something in the future.

; Directives following the section heading [PATH=/www/mysite] only
; apply to PHP files in the /www/mysite directory.  Directives
; following the section heading [HOST=www.example.com] only apply to
; PHP files served from www.example.com.  Directives set in these
; special sections cannot be overridden by user-defined INI files or
; at runtime. Currently, [PATH=] and [HOST=] sections only work under
; CGI/FastCGI.
; http://php.net/ini.sections

; Directives are specified using the following syntax:
; directive = value
; Directive names are *case sensitive* - foo=bar is different from FOO=bar.
; Directives are variables used to configure PHP or PHP extensions.
; There is no name validation.  If PHP can‘t find an expected
; directive because it is not set or is mistyped, a default value will be used.

; The value can be a string, a number, a PHP constant (e.g. E_ALL or M_PI), one
; of the INI constants (On, Off, True, False, Yes, No and None) or an expression
; (e.g. E_ALL & ~E_NOTICE), a quoted string ("bar"), or a reference to a
; previously set variable or directive (e.g. ${foo})

; Expressions in the INI file are limited to bitwise operators and parentheses:
; |  bitwise OR
; ^  bitwise XOR
; &  bitwise AND
; ~  bitwise NOT
; !  boolean NOT

; Boolean flags can be turned on using the values 1, On, True or Yes.
; They can be turned off using the values 0, Off, False or No.

; An empty string can be denoted by simply not writing anything after the equal
; sign, or by using the None keyword:

;  foo =         ; sets foo to an empty string
;  foo = None    ; sets foo to an empty string
;  foo = "None"  ; sets foo to the string ‘None‘

; If you use constants in your value, and these constants belong to a
; dynamically loaded extension (either a PHP extension or a Zend extension),
; you may only use these constants *after* the line that loads the extension.

;;;;;;;;;;;;;;;;;;;
; About this file ;
;;;;;;;;;;;;;;;;;;;
; PHP comes packaged with two INI files. One that is recommended to be used
; in production environments and one that is recommended to be used in
; development environments.

; php.ini-production contains settings which hold security, performance and
; best practices at its core. But please be aware, these settings may break
; compatibility with older or less security conscience applications. We
; recommending using the production ini in production and testing environments.

; php.ini-development is very similar to its production variant, except it‘s
; much more verbose when it comes to errors. We recommending using the
; development version only in development environments as errors shown to
; application users can inadvertently leak otherwise secure information.

; This is php.ini-production INI file.

;;;;;;;;;;;;;;;;;;;
; Quick Reference ;
;;;;;;;;;;;;;;;;;;;
; The following are all the settings which are different in either the production
; or development versions of the INIs with respect to PHP‘s default behavior.
; Please see the actual settings later in the document for more details as to why
; we recommend these changes in PHP‘s behavior.

; display_errors
;   Default Value: On
;   Development Value: On
;   Production Value: Off

; display_startup_errors
;   Default Value: Off
;   Development Value: On
;   Production Value: Off

; error_reporting
;   Default Value: E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED
;   Development Value: E_ALL
;   Production Value: E_ALL & ~E_DEPRECATED & ~E_STRICT

; html_errors
;   Default Value: On
;   Development Value: On
;   Production value: On

; log_errors
;   Default Value: Off
;   Development Value: On
;   Production Value: On

; max_input_time
;   Default Value: -1 (Unlimited)
;   Development Value: 60 (60 seconds)
;   Production Value: 60 (60 seconds)

; output_buffering
;   Default Value: Off
;   Development Value: 4096
; PHP‘s default setting for include_path is ".;/path/to/php/pear"
; http://php.net/include-path

; The root of the PHP pages, used only if nonempty.
; 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)
; see documentation for security issues.  The alternate is to use the
; cgi.force_redirect configuration below
; http://php.net/doc-root
doc_root =
; PHP‘s default setting for include_path is ".;/path/to/php/pear"
; http://php.net/include-path

; The root of the PHP pages, used only if nonempty.
; 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)
; see documentation for security issues.  The alternate is to use the
; cgi.force_redirect configuration below
; http://php.net/doc-root
doc_root =

; The directory under which PHP opens the script using /~username used only
; if nonempty.
; http://php.net/user-dir
user_dir =

; Directory in which the loadable extensions (modules) reside.
; http://php.net/extension-dir
; extension_dir = "./"

; On windows:
; extension_dir = "ext"

; Whether or not to enable the dl() function.  The dl() function does NOT work
; properly in multithreaded servers, such as IIS or Zeus, and is automatically
; disabled on them.
; http://php.net/enable-dl
enable_dl = Off

; 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 here AT YOUR OWN RISK
; **You CAN safely turn this off for IIS, in fact, you MUST.**
; http://php.net/cgi.force-redirect
;cgi.force_redirect = 1

; if cgi.nph is enabled it will force cgi to always sent Status: 200 with
; every request. PHP‘s default behavior is to disable this feature.
;cgi.nph = 1

; 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.  Setting this variable MAY
; cause security issues, KNOW WHAT YOU ARE DOING FIRST.
; http://php.net/cgi.redirect-status-env
;cgi.redirect_status_env =

; cgi.fix_pathinfo 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.  Default is 1.  You should fix your scripts
; to use SCRIPT_FILENAME rather than PATH_TRANSLATED.
; http://php.net/cgi.fix-pathinfo
;cgi.fix_pathinfo=1

; 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.
; http://php.net/fastcgi.impersonate
;fastcgi.impersonate = 1

; Disable logging through FastCGI connection. PHP‘s default behavior is to enable
; this feature.
;fastcgi.logging = 0

; cgi.rfc2616_headers configuration option tells PHP what type of headers to
; use when sending HTTP response code. If it‘s set 0 PHP sends Status: header that
; is supported by Apache. When this option is set to 1 PHP will send
; RFC2616 compliant header.
; Default is zero.
; http://php.net/cgi.rfc2616-headers
;cgi.rfc2616_headers = 0

;;;;;;;;;;;;;;;;
; File Uploads ;
;;;;;;;;;;;;;;;;

; Whether to allow HTTP file uploads.
; http://php.net/file-uploads
file_uploads = On

; Temporary directory for HTTP uploaded files (will use system default if not
; specified).
; http://php.net/upload-tmp-dir
;upload_tmp_dir =

; Maximum allowed size for uploaded files.
; http://php.net/upload-max-filesize
upload_max_filesize = 2M

; Maximum number of files that can be uploaded via a single request
max_file_uploads = 20

;;;;;;;;;;;;;;;;;;
; Fopen wrappers ;
;;;;;;;;;;;;;;;;;;

; Whether to allow the treatment of URLs (like http:// or ftp://) as files.
; http://php.net/allow-url-fopen
allow_url_fopen = On

; Whether to allow include/require to open URLs (like http:// or ftp://) as files.
; http://php.net/allow-url-include
allow_url_include = On

; Define the anonymous ftp password (your email address). PHP‘s default setting
; for this is empty.
; http://php.net/from
;from="john@doe.com"

; Define the User-Agent string. PHP‘s default setting for this is empty.
; http://php.net/user-agent
;user_agent="PHP"

; Default timeout for socket based streams (seconds)
; http://php.net/default-socket-timeout
default_socket_timeout = 60

; If your scripts have to deal with files from Macintosh systems,
; or you are running on a Mac and need to deal with files from
; unix or win32 systems, setting this flag will cause PHP to
; automatically detect the EOL character in those files so that
; fgets() and file() will work regardless of the source of the file.
; http://php.net/auto-detect-line-endings
;auto_detect_line_endings = Off

;;;;;;;;;;;;;;;;;;;;;;
; Dynamic Extensions ;
;;;;;;;;;;;;;;;;;;;;;;

; If you wish to have an extension loaded automatically, use the following
; syntax:
;
;   extension=modulename.extension
;
; For example, on Windows:
;
;   extension=msql.dll
;
; ... or under UNIX:
;
;   extension=msql.so
;
; ... or with a path:
;
;   extension=/path/to/extension/msql.so
;
; If you only provide the name of the extension, PHP will look for it in its
; default extension directory.

;;;;
; Note: packaged extension modules are now loaded via the .ini files
; found in the directory /etc/php.d; these are loaded by default.
;;;;

;;;;;;;;;;;;;;;;;;;
; Module Settings ;
;;;;;;;;;;;;;;;;;;;

[CLI Server]
; Whether the CLI web server uses ANSI color coding in its terminal output.
cli_server.color = On

[Date]
; Defines the default timezone used by the date functions
; http://php.net/date.timezone
;date.timezone =
date.timezone = Asia/Shanghai

; http://php.net/date.default-latitude
;date.default_latitude = 31.7667

; http://php.net/date.default-longitude
;date.default_longitude = 35.2333

; http://php.net/date.sunrise-zenith
;date.sunrise_zenith = 90.583333

; http://php.net/date.sunset-zenith
;date.sunset_zenith = 90.583333

[filter]
; http://php.net/filter.default
;filter.default = unsafe_raw

; http://php.net/filter.default-flags
;filter.default_flags =

[iconv]
;iconv.input_encoding = ISO-8859-1
;iconv.internal_encoding = ISO-8859-1
;iconv.output_encoding = ISO-8859-1

[intl]
;intl.default_locale =
; This directive allows you to produce PHP errors when some error
; happens within intl functions. The value is the level of the error produced.
; Default is 0, which does not produce any errors.
;intl.error_level = E_WARNING

[sqlite]
; http://php.net/sqlite.assoc-case
;sqlite.assoc_case = 0

[sqlite3]
;sqlite3.extension_dir =

[Pcre]
;PCRE library backtracking limit.
; http://php.net/pcre.backtrack-limit
;pcre.backtrack_limit=100000

;PCRE library recursion limit.
;Please note that if you set this value to a high number you may consume all
;the available process stack and eventually crash PHP (due to reaching the
;stack size limit imposed by the Operating System).
; http://php.net/pcre.recursion-limit
;pcre.recursion_limit=100000

[Pdo]
; Whether to pool ODBC connections. Can be one of "strict", "relaxed" or "off"
; http://php.net/pdo-odbc.connection-pooling
;pdo_odbc.connection_pooling=strict

;pdo_odbc.db2_instance_name

[Pdo_mysql]
; If mysqlnd is used: Number of cache slots for the internal result set cache
; http://php.net/pdo_mysql.cache_size
pdo_mysql.cache_size = 2000

; Default socket name for local MySQL connects.  If empty, uses the built-in
; MySQL defaults.
; http://php.net/pdo_mysql.default-socket
pdo_mysql.default_socket=

[Phar]
; http://php.net/phar.readonly
;phar.readonly = On

; http://php.net/phar.require-hash
;phar.require_hash = On

;phar.cache_list =

[mail function]
; For Win32 only.
; http://php.net/smtp
SMTP = localhost
; http://php.net/smtp-port
smtp_port = 25

; For Win32 only.
; http://php.net/sendmail-from
;sendmail_from = me@example.com

; For Unix only.  You may supply arguments as well (default: "sendmail -t -i").
; http://php.net/sendmail-path
sendmail_path = /usr/sbin/sendmail -t -i

; Force the addition of the specified parameters to be passed as extra parameters
; to the sendmail binary. These parameters will always replace the value of
; the 5th parameter to mail(), even in safe mode.
;mail.force_extra_parameters =

; Add X-PHP-Originating-Script: that will include uid of the script followed by the filename
mail.add_x_header = On

; The path to a log file that will log all mail() calls. Log entries include
; the full path of the script, line number, To address and headers.
;mail.log =
; Log mail to syslog (Event Log on Windows).
;mail.log = syslog

[SQL]
; http://php.net/sql.safe-mode
sql.safe_mode = Off

[ODBC]
; http://php.net/odbc.default-db
;odbc.default_db    =  Not yet implemented

; http://php.net/odbc.default-user
;odbc.default_user  =  Not yet implemented

; http://php.net/odbc.default-pw
;odbc.default_pw    =  Not yet implemented

; Controls the ODBC cursor model.
; Default: SQL_CURSOR_STATIC (default).
;odbc.default_cursortype

; Allow or prevent persistent links.
; http://php.net/odbc.allow-persistent
odbc.allow_persistent = On

; Check that a connection is still valid before reuse.
; http://php.net/odbc.check-persistent
odbc.check_persistent = On

; Maximum number of persistent links.  -1 means no limit.
; http://php.net/odbc.max-persistent
odbc.max_persistent = -1

; Maximum number of links (persistent + non-persistent).  -1 means no limit.
; http://php.net/odbc.max-links
odbc.max_links = -1

; Handling of LONG fields.  Returns number of bytes to variables.  0 means
; passthru.
; http://php.net/odbc.defaultlrl
odbc.defaultlrl = 4096

; Handling of binary data.  0 means passthru, 1 return as is, 2 convert to char.
; See the documentation on odbc_binmode and odbc_longreadlen for an explanation
; of odbc.defaultlrl and odbc.defaultbinmode
; http://php.net/odbc.defaultbinmode
odbc.defaultbinmode = 1

;birdstep.max_links = -1

[Interbase]
; Allow or prevent persistent links.
ibase.allow_persistent = 1

; Maximum number of persistent links.  -1 means no limit.
ibase.max_persistent = -1

; Maximum number of links (persistent + non-persistent).  -1 means no limit.
ibase.max_links = -1

; Default database name for ibase_connect().
;ibase.default_db =

; Default username for ibase_connect().
;ibase.default_user =

; Default password for ibase_connect().
;ibase.default_password =

; Default charset for ibase_connect().
;ibase.default_charset =

; Default timestamp format.
ibase.timestampformat = "%Y-%m-%d %H:%M:%S"

; Default date format.
ibase.dateformat = "%Y-%m-%d"

; Default time format.
ibase.timeformat = "%H:%M:%S"

[MySQL]
; Allow accessing, from PHP‘s perspective, local files with LOAD DATA statements
; http://php.net/mysql.allow_local_infile
mysql.allow_local_infile = On

; Allow or prevent persistent links.
; http://php.net/mysql.allow-persistent
mysql.allow_persistent = On

; If mysqlnd is used: Number of cache slots for the internal result set cache
; http://php.net/mysql.cache_size
mysql.cache_size = 2000

; Maximum number of persistent links.  -1 means no limit.
; http://php.net/mysql.max-persistent
mysql.max_persistent = -1

; Maximum number of links (persistent + non-persistent).  -1 means no limit.
; http://php.net/mysql.max-links
mysql.max_links = -1

; Default port number for mysql_connect().  If unset, mysql_connect() will use
; the $MYSQL_TCP_PORT or the mysql-tcp entry in /etc/services or the
; compile-time value defined MYSQL_PORT (in that order).  Win32 will only look
; at MYSQL_PORT.
; http://php.net/mysql.default-port
mysql.default_port =

; Default socket name for local MySQL connects.  If empty, uses the built-in
; MySQL defaults.
; http://php.net/mysql.default-socket
mysql.default_socket =

; Default host for mysql_connect() (doesn‘t apply in safe mode).
; http://php.net/mysql.default-host
mysql.default_host =

; Default user for mysql_connect() (doesn‘t apply in safe mode).
; http://php.net/mysql.default-user
mysql.default_user =

; Default password for mysql_connect() (doesn‘t apply in safe mode).
; Note that this is generally a *bad* idea to store passwords in this file.
; *Any* user with PHP access can run ‘echo get_cfg_var("mysql.default_password")
; and reveal this password!  And of course, any users with read access to this
; file will be able to reveal the password as well.
; http://php.net/mysql.default-password
mysql.default_password =

; Maximum time (in seconds) for connect timeout. -1 means no limit
; http://php.net/mysql.connect-timeout
mysql.connect_timeout = 60

; Trace mode. When trace_mode is active (=On), warnings for table/index scans and
; SQL-Errors will be displayed.
; http://php.net/mysql.trace-mode
mysql.trace_mode = Off

[MySQLi]

; Maximum number of persistent links.  -1 means no limit.
; http://php.net/mysqli.max-persistent
mysqli.max_persistent = -1

; Allow accessing, from PHP‘s perspective, local files with LOAD DATA statements
; http://php.net/mysqli.allow_local_infile
;mysqli.allow_local_infile = On

; Allow or prevent persistent links.
; http://php.net/mysqli.allow-persistent
mysqli.allow_persistent = On

; Maximum number of links.  -1 means no limit.
; http://php.net/mysqli.max-links
mysqli.max_links = -1

; If mysqlnd is used: Number of cache slots for the internal result set cache
; http://php.net/mysqli.cache_size
mysqli.cache_size = 2000

; Default port number for mysqli_connect().  If unset, mysqli_connect() will use
; the $MYSQL_TCP_PORT or the mysql-tcp entry in /etc/services or the
; compile-time value defined MYSQL_PORT (in that order).  Win32 will only look
; at MYSQL_PORT.
; http://php.net/mysqli.default-port
mysqli.default_port = 3306

; Default socket name for local MySQL connects.  If empty, uses the built-in
; MySQL defaults.
; http://php.net/mysqli.default-socket
mysqli.default_socket =

; Default host for mysql_connect() (doesn‘t apply in safe mode).
; http://php.net/mysqli.default-host
mysqli.default_host =

; Default user for mysql_connect() (doesn‘t apply in safe mode).
; http://php.net/mysqli.default-user
mysqli.default_user =

; Default password for mysqli_connect() (doesn‘t apply in safe mode).
; Note that this is generally a *bad* idea to store passwords in this file.
; *Any* user with PHP access can run ‘echo get_cfg_var("mysqli.default_pw")
; and reveal this password!  And of course, any users with read access to this
; file will be able to reveal the password as well.
; http://php.net/mysqli.default-pw
mysqli.default_pw =

; Allow or prevent reconnect
mysqli.reconnect = Off

[mysqlnd]
; Enable / Disable collection of general statistics by mysqlnd which can be
; used to tune and monitor MySQL operations.
; http://php.net/mysqlnd.collect_statistics
mysqlnd.collect_statistics = On

; Enable / Disable collection of memory usage statistics by mysqlnd which can be
; used to tune and monitor MySQL operations.
; http://php.net/mysqlnd.collect_memory_statistics
mysqlnd.collect_memory_statistics = Off

; Size of a pre-allocated buffer used when sending commands to MySQL in bytes.
; http://php.net/mysqlnd.net_cmd_buffer_size
;mysqlnd.net_cmd_buffer_size = 2048

; Size of a pre-allocated buffer used for reading data sent by the server in
; bytes.
; http://php.net/mysqlnd.net_read_buffer_size
;mysqlnd.net_read_buffer_size = 32768

[OCI8]

; Connection: Enables privileged connections using external
; credentials (OCI_SYSOPER, OCI_SYSDBA)
; http://php.net/oci8.privileged-connect
;oci8.privileged_connect = Off

; Connection: The maximum number of persistent OCI8 connections per
; process. Using -1 means no limit.
; http://php.net/oci8.max-persistent
;oci8.max_persistent = -1

; Connection: The maximum number of seconds a process is allowed to
; maintain an idle persistent connection. Using -1 means idle
; persistent connections will be maintained forever.
; http://php.net/oci8.persistent-timeout
;oci8.persistent_timeout = -1

; Connection: The number of seconds that must pass before issuing a
; ping during oci_pconnect() to check the connection validity. When
; set to 0, each oci_pconnect() will cause a ping. Using -1 disables
; pings completely.
; http://php.net/oci8.ping-interval
;oci8.ping_interval = 60

; Connection: Set this to a user chosen connection class to be used
; for all pooled server requests with Oracle 11g Database Resident
; Connection Pooling (DRCP).  To use DRCP, this value should be set to
; the same string for all web servers running the same application,
; the database pool must be configured, and the connection string must
; specify to use a pooled server.
;oci8.connection_class =

; High Availability: Using On lets PHP receive Fast Application
; Notification (FAN) events generated when a database node fails. The
; database must also be configured to post FAN events.
;oci8.events = Off

; Tuning: This option enables statement caching, and specifies how
; many statements to cache. Using 0 disables statement caching.
; http://php.net/oci8.statement-cache-size
;oci8.statement_cache_size = 20

; Tuning: Enables statement prefetching and sets the default number of
; rows that will be fetched automatically after statement execution.
; http://php.net/oci8.default-prefetch
;oci8.default_prefetch = 100

; Compatibility. Using On means oci_close() will not close
; oci_connect() and oci_new_connect() connections.
; http://php.net/oci8.old-oci-close-semantics
;oci8.old_oci_close_semantics = Off

[PostgreSQL]
; Allow or prevent persistent links.
; http://php.net/pgsql.allow-persistent
pgsql.allow_persistent = On

; Detect broken persistent links always with pg_pconnect().
; Auto reset feature requires a little overheads.
; http://php.net/pgsql.auto-reset-persistent
pgsql.auto_reset_persistent = Off

; Maximum number of persistent links.  -1 means no limit.
; http://php.net/pgsql.max-persistent
pgsql.max_persistent = -1

; Maximum number of links (persistent+non persistent).  -1 means no limit.
; http://php.net/pgsql.max-links
pgsql.max_links = -1

; Ignore PostgreSQL backends Notice message or not.
; Notice message logging require a little overheads.
; http://php.net/pgsql.ignore-notice
pgsql.ignore_notice = 0

; Log PostgreSQL backends Notice message or not.
; Unless pgsql.ignore_notice=0, module cannot log notice message.
; http://php.net/pgsql.log-notice
pgsql.log_notice = 0

[Sybase-CT]
; Allow or prevent persistent links.
; http://php.net/sybct.allow-persistent
sybct.allow_persistent = On

; Maximum number of persistent links.  -1 means no limit.
; http://php.net/sybct.max-persistent
sybct.max_persistent = -1

; Maximum number of links (persistent + non-persistent).  -1 means no limit.
; http://php.net/sybct.max-links
sybct.max_links = -1

; Minimum server message severity to display.
; http://php.net/sybct.min-server-severity
sybct.min_server_severity = 10

; Minimum client message severity to display.
; http://php.net/sybct.min-client-severity
sybct.min_client_severity = 10

; Set per-context timeout
; http://php.net/sybct.timeout
;sybct.timeout=

;sybct.packet_size

; The maximum time in seconds to wait for a connection attempt to succeed before returning failure.
; Default: one minute
;sybct.login_timeout=

; The name of the host you claim to be connecting from, for display by sp_who.
; Default: none
;sybct.hostname=

; Allows you to define how often deadlocks are to be retried. -1 means "forever".
; Default: 0
;sybct.deadlock_retry_count=

[bcmath]
; Number of decimal digits for all bcmath functions.
; http://php.net/bcmath.scale
bcmath.scale = 0

[browscap]
; http://php.net/browscap
;browscap = extra/browscap.ini

[Session]
; Handler used to store/retrieve data.
; http://php.net/session.save-handler
session.save_handler = files

; Argument passed to save_handler.  In the case of files, this is the path
; where data files are stored. Note: Windows users have to change this
; variable in order to use PHP‘s session functions.
;
; The path can be defined as:
;
;     session.save_path = "N;/path"
;
; where N is an integer.  Instead of storing all the session files in
; /path, what this will do is use subdirectories N-levels deep, and
; store the session data in those directories.  This is useful if you
; or your OS have problems with lots of files in one directory, and is
; a more efficient layout for servers that handle lots of sessions.
;
; NOTE 1: PHP will not create this directory structure automatically.
;         You can use the script in the ext/session dir for that purpose.
; NOTE 2: See the section on garbage collection below if you choose to
;         use subdirectories for session storage
;
; The file storage module creates files using mode 600 by default.
; You can change that by using
;
;     session.save_path = "N;MODE;/path"
;
; where MODE is the octal representation of the mode. Note that this
; does not overwrite the process‘s umask.
; http://php.net/session.save-path

; RPM note : session directory must be owned by process owner
; for mod_php, see /etc/httpd/conf.d/php.conf
; for php-fpm, see /etc/php-fpm.d/*conf
;session.save_path = "/tmp"

; Whether to use cookies.
; http://php.net/session.use-cookies
session.use_cookies = 1

; http://php.net/session.cookie-secure
;session.cookie_secure =

; This option forces PHP to fetch and use a cookie for storing and maintaining
; the session id. We encourage this operation as it‘s very helpful in combating
; session hijacking when not specifying and managing your own session id. It is
; not the end all be all of session hijacking defense, but it‘s a good start.
; http://php.net/session.use-only-cookies
session.use_only_cookies = 1

; Name of the session (used as cookie name).
; http://php.net/session.name
session.name = PHPSESSID

; Initialize session on request startup.
; http://php.net/session.auto-start
session.auto_start = 0

; Lifetime in seconds of cookie or, if 0, until browser is restarted.
; http://php.net/session.cookie-lifetime
session.cookie_lifetime = 0

; The path for which the cookie is valid.
; http://php.net/session.cookie-path
session.cookie_path = /

; The domain for which the cookie is valid.
; http://php.net/session.cookie-domain
session.cookie_domain =

; Whether or not to add the httpOnly flag to the cookie, which makes it inaccessible to browser scripting languages such as JavaScript.
; http://php.net/session.cookie-httponly
session.cookie_httponly =

; Handler used to serialize data.  php is the standard serializer of PHP.
; http://php.net/session.serialize-handler
session.serialize_handler = php

; Defines the probability that the ‘garbage collection‘ process is started
; on every session initialization. The probability is calculated by using
; gc_probability/gc_divisor. Where session.gc_probability is the numerator
; and gc_divisor is the denominator in the equation. Setting this value to 1
; when the session.gc_divisor value is 100 will give you approximately a 1% chance
; the gc will run on any give request.
; Default Value: 1
; Development Value: 1
; Production Value: 1
; http://php.net/session.gc-probability
session.gc_probability = 1

; Defines the probability that the ‘garbage collection‘ process is started on every
; session initialization. The probability is calculated by using the following equation:
; gc_probability/gc_divisor. Where session.gc_probability is the numerator and
; session.gc_divisor is the denominator in the equation. Setting this value to 1
; when the session.gc_divisor value is 100 will give you approximately a 1% chance
; the gc will run on any give request. Increasing this value to 1000 will give you
; a 0.1% chance the gc will run on any give request. For high volume production servers,
; this is a more efficient approach.
; Default Value: 100
; Development Value: 1000
; Production Value: 1000
; http://php.net/session.gc-divisor
session.gc_divisor = 1000

; After this number of seconds, stored data will be seen as ‘garbage‘ and
; cleaned up by the garbage collection process.
; http://php.net/session.gc-maxlifetime
session.gc_maxlifetime = 1440

; NOTE: If you are using the subdirectory option for storing session files
;       (see session.save_path above), then garbage collection does *not*
;       happen automatically.  You will need to do your own garbage
;       collection through a shell script, cron entry, or some other method.
;       For example, the following script would is the equivalent of
;       setting session.gc_maxlifetime to 1440 (1440 seconds = 24 minutes):
;          find /path/to/sessions -cmin +24 -type f | xargs rm

; Check HTTP Referer to invalidate externally stored URLs containing ids.
; HTTP_REFERER has to contain this substring for the session to be
; considered as valid.
; http://php.net/session.referer-check
session.referer_check =

; How many bytes to read from the file.
; http://php.net/session.entropy-length
;session.entropy_length = 32

; Specified here to create the session id.
; http://php.net/session.entropy-file
; Defaults to /dev/urandom
; On systems that don‘t have /dev/urandom but do have /dev/arandom, this will default to /dev/arandom
; If neither are found at compile time, the default is no entropy file.
; On windows, setting the entropy_length setting will activate the
; Windows random source (using the CryptoAPI)
;session.entropy_file = /dev/urandom

; Set to {nocache,private,public,} to determine HTTP caching aspects
; or leave this empty to avoid sending anti-caching headers.
; http://php.net/session.cache-limiter
session.cache_limiter = nocache

; Document expires after n minutes.
; http://php.net/session.cache-expire
session.cache_expire = 180

; trans sid support is disabled by default.
; Use of trans sid may risk your users security.
; Use this option with caution.
; - User may send URL contains active session ID
;   to other person via. email/irc/etc.
; - URL that contains active session ID may be stored
;   in publicly accessible computer.
; - User may access your site with the same session ID
;   always using URL stored in browser‘s history or bookmarks.
; http://php.net/session.use-trans-sid
session.use_trans_sid = 0

; Select a hash function for use in generating session ids.
; Possible Values
;   0  (MD5 128 bits)
;   1  (SHA-1 160 bits)
; This option may also be set to the name of any hash function supported by
; the hash extension. A list of available hashes is returned by the hash_algos()
; function.
; http://php.net/session.hash-function
session.hash_function = 0

; Define how many bits are stored in each character when converting
; the binary hash data to something readable.
; Possible values:
;   4  (4 bits: 0-9, a-f)
;   5  (5 bits: 0-9, a-v)
;   6  (6 bits: 0-9, a-z, A-Z, "-", ",")
; Default Value: 4
; Development Value: 5
; Production Value: 5
; http://php.net/session.hash-bits-per-character
session.hash_bits_per_character = 5

; The URL rewriter will look for URLs in a defined set of HTML tags.
; form/fieldset are special; if you include them here, the rewriter will
; add a hidden <input> field with the info which is otherwise appended
; to URLs.  If you want XHTML conformity, remove the form entry.
; Note that all valid entries require a "=", even if no value follows.
; Default Value: "a=href,area=href,frame=src,form=,fieldset="
; Development Value: "a=href,area=href,frame=src,input=src,form=fakeentry"
; Production Value: "a=href,area=href,frame=src,input=src,form=fakeentry"
; http://php.net/url-rewriter.tags
url_rewriter.tags = "a=href,area=href,frame=src,input=src,form=fakeentry"

; Enable upload progress tracking in $_SESSION
; Default Value: On
; Development Value: On
; Production Value: On
; http://php.net/session.upload-progress.enabled
;session.upload_progress.enabled = On

; Cleanup the progress information as soon as all POST data has been read
; (i.e. upload completed).
; Default Value: On
; Development Value: On
; Production Value: On
; http://php.net/session.upload-progress.cleanup
;session.upload_progress.cleanup = On

; A prefix used for the upload progress key in $_SESSION
; Default Value: "upload_progress_"
; Development Value: "upload_progress_"
; Production Value: "upload_progress_"
; http://php.net/session.upload-progress.prefix
;session.upload_progress.prefix = "upload_progress_"

; The index name (concatenated with the prefix) in $_SESSION
; containing the upload progress information
; Default Value: "PHP_SESSION_UPLOAD_PROGRESS"
; Development Value: "PHP_SESSION_UPLOAD_PROGRESS"
; Production Value: "PHP_SESSION_UPLOAD_PROGRESS"
; http://php.net/session.upload-progress.name
;session.upload_progress.name = "PHP_SESSION_UPLOAD_PROGRESS"

; How frequently the upload progress should be updated.
; Given either in percentages (per-file), or in bytes
; Default Value: "1%"
; Development Value: "1%"
; Production Value: "1%"
; http://php.net/session.upload-progress.freq
;session.upload_progress.freq =  "1%"

; The minimum delay between updates, in seconds
; Default Value: 1
; Development Value: 1
; Production Value: 1
; http://php.net/session.upload-progress.min-freq
;session.upload_progress.min_freq = "1"

[MSSQL]
; Allow or prevent persistent links.
mssql.allow_persistent = On

; Maximum number of persistent links.  -1 means no limit.
mssql.max_persistent = -1

; Maximum number of links (persistent+non persistent).  -1 means no limit.
mssql.max_links = -1

; Minimum error severity to display.
mssql.min_error_severity = 10

; Minimum message severity to display.
mssql.min_message_severity = 10

; Compatibility mode with old versions of PHP 3.0.
mssql.compatability_mode = Off

; Connect timeout
;mssql.connect_timeout = 5

; Query timeout
;mssql.timeout = 60

; Valid range 0 - 2147483647.  Default = 4096.
;mssql.textlimit = 4096

; Valid range 0 - 2147483647.  Default = 4096.
;mssql.textsize = 4096

; Limits the number of records in each batch.  0 = all records in one batch.
;mssql.batchsize = 0

; Specify how datetime and datetim4 columns are returned
; On => Returns data converted to SQL server settings
; Off => Returns values as YYYY-MM-DD hh:mm:ss
;mssql.datetimeconvert = On

; Use NT authentication when connecting to the server
mssql.secure_connection = Off

; Specify max number of processes. -1 = library default
; msdlib defaults to 25
; FreeTDS defaults to 4096
;mssql.max_procs = -1

; Specify client character set.
; If empty or not set the client charset from freetds.conf is used
; This is only used when compiled with FreeTDS
;mssql.charset = "ISO-8859-1"

[Assertion]
; Assert(expr); active by default.
; http://php.net/assert.active
;assert.active = On

; Issue a PHP warning for each failed assertion.
; http://php.net/assert.warning
;assert.warning = On

; Don‘t bail out by default.
; http://php.net/assert.bail
;assert.bail = Off

; User-function to be called if an assertion fails.
; http://php.net/assert.callback
;assert.callback = 0

; Eval the expression with current error_reporting().  Set to true if you want
; error_reporting(0) around the eval().
; http://php.net/assert.quiet-eval
;assert.quiet_eval = 0

[mbstring]
; language for internal character representation.
; http://php.net/mbstring.language
;mbstring.language = Japanese

; internal/script encoding.
; Some encoding cannot work as internal encoding.
; (e.g. SJIS, BIG5, ISO-2022-*)
; http://php.net/mbstring.internal-encoding
;mbstring.internal_encoding = EUC-JP

; http input encoding.
; http://php.net/mbstring.http-input
;mbstring.http_input = auto

; http output encoding. mb_output_handler must be
; registered as output buffer to function
; http://php.net/mbstring.http-output
;mbstring.http_output = SJIS

; enable automatic encoding translation according to
; mbstring.internal_encoding setting. Input chars are
; converted to internal encoding by setting this to On.
; Note: Do _not_ use automatic encoding translation for
;       portable libs/applications.
; http://php.net/mbstring.encoding-translation
;mbstring.encoding_translation = Off

; automatic encoding detection order.
; auto means
; http://php.net/mbstring.detect-order
;mbstring.detect_order = auto

; substitute_character used when character cannot be converted
; one from another
; http://php.net/mbstring.substitute-character
;mbstring.substitute_character = none;

; overload(replace) single byte functions by mbstring functions.
; mail(), ereg(), etc are overloaded by mb_send_mail(), mb_ereg(),
; etc. Possible values are 0,1,2,4 or combination of them.
; For example, 7 for overload everything.
; 0: No overload
; 1: Overload mail() function
; 2: Overload str*() functions
; 4: Overload ereg*() functions
; http://php.net/mbstring.func-overload
;mbstring.func_overload = 0

; enable strict encoding detection.
;mbstring.strict_detection = Off

; This directive specifies the regex pattern of content types for which mb_output_handler()
; is activated.
; Default: mbstring.http_output_conv_mimetype=^(text/|application/xhtml\+xml)
;mbstring.http_output_conv_mimetype=

[gd]
; Tell the jpeg decode to ignore warnings and try to create
; a gd image. The warning will then be displayed as notices
; disabled by default
; http://php.net/gd.jpeg-ignore-warning
;gd.jpeg_ignore_warning = 0

[exif]
; Exif UNICODE user comments are handled as UCS-2BE/UCS-2LE and JIS as JIS.
; With mbstring support this will automatically be converted into the encoding
; given by corresponding encode setting. When empty mbstring.internal_encoding
; is used. For the decode settings you can distinguish between motorola and
; intel byte order. A decode setting cannot be empty.
; http://php.net/exif.encode-unicode
;exif.encode_unicode = ISO-8859-15

; http://php.net/exif.decode-unicode-motorola
;exif.decode_unicode_motorola = UCS-2BE

; http://php.net/exif.decode-unicode-intel
;exif.decode_unicode_intel    = UCS-2LE

; http://php.net/exif.encode-jis
;exif.encode_jis =

; http://php.net/exif.decode-jis-motorola
;exif.decode_jis_motorola = JIS

; http://php.net/exif.decode-jis-intel
;exif.decode_jis_intel    = JIS

[Tidy]
; The path to a default tidy configuration file to use when using tidy
; http://php.net/tidy.default-config
;tidy.default_config = /usr/local/lib/php/default.tcfg

; Should tidy clean and repair output automatically?
; WARNING: Do not use this option if you are generating non-html content
; such as dynamic images
; http://php.net/tidy.clean-output
tidy.clean_output = Off

[soap]
; Enables or disables WSDL caching feature.
; http://php.net/soap.wsdl-cache-enabled
soap.wsdl_cache_enabled=1

; Sets the directory name where SOAP extension will put cache files.
; http://php.net/soap.wsdl-cache-dir
soap.wsdl_cache_dir="/tmp"

; (time to live) Sets the number of second while cached file will be used
; instead of original one.
; http://php.net/soap.wsdl-cache-ttl
soap.wsdl_cache_ttl=86400

; Sets the size of the cache limit. (Max. number of WSDL files to cache)
soap.wsdl_cache_limit = 5

zend_extension= /usr/local/webserver/php/modules/xdebug.so
xdebug.profiler_enable=on
xdebug.trace_output_dir="/usr/local/webserver/php/xdebug_trace"
xdebug.profiler_output_dir="/usr/local/webserver/php/xdebug_profiler"

xdebug.var_display_max_children=128
xdebug.var_display_max_data=512
xdebug.var_display_max_depth=5

[sysvshm]
; A default size of the shared memory segment
;sysvshm.init_mem = 10000

[ldap]
; Sets the maximum number of open links or -1 for unlimited.
ldap.max_links = -1

[mcrypt]
; For more information about mcrypt settings see http://php.net/mcrypt-module-open

; Directory where to load mcrypt algorithms
; Default: Compiled in into libmcrypt (usually /usr/local/lib/libmcrypt)
;mcrypt.algorithms_dir=

; Directory where to load mcrypt modes
; Default: Compiled in into libmcrypt (usually /usr/local/lib/libmcrypt)
;mcrypt.modes_dir=

[dba]
;dba.default_handler=

[curl]
; A default value for the CURLOPT_CAINFO option. This is required to be an
; absolute path.
;curl.cainfo =

; Local Variables:
; tab-width: 4
; End:

php.ini 文件中配置的意义注释

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原文地址:http://www.cnblogs.com/hubaohua1588/p/6708338.html

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