在discuz论坛的nginx配置文件当中，我们可以看到有一段php解析的配置，如下：

    location ~ \.php$ {

        try_files $uri = 404;

        fastcgi_pass   127.0.0.1:9000;

        fastcgi_index  index.php;

        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;

        include        fastcgi_params;

    }

[root@localhost vhost]# netstat -tulnp |grep php

tcp        0      0 127.0.0.1:9000          0.0.0.0:*               LISTEN      903/php-fpm: master

我们知道php启动后监听的端口为9000端口，当nginx配置的端口错误时，则会报502的错误。如下：

[root@localhost vhost]# cat discuz.conf

server {

    listen       80;

    server_name  192.168.56.11;

    root /data/web/discuz;

    index index.php index.html index.htm;

    # 建议放内网

    # allow 192.168.0.0/24;

    # deny all;

    location / {

        try_files $uri $uri/ /index.php$is_args$args;

    }

    location ~ \.php$ {

        try_files $uri = 404;

        fastcgi_pass   127.0.0.1:9001;

	fastcgi_index  index.php;

        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;

        include        fastcgi_params;

    }

}

[root@localhost vhost]# nginx -t

nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok

nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

[root@localhost vhost]# systemctl reload nginx

[root@localhost vhost]# curl 192.168.56.11

<html>

<head><title>502 Bad Gateway</title></head>

<body bgcolor="white">

<center><h1>502 Bad Gateway</h1></center>

<hr><center>nginx/1.12.2</center>

</body>

</html>

那么现在再来看一看php-fpm.conf这个配置文件，对于php-fpm的一些配置进行一些了解：

[root@localhost vhost]# cat /etc/php-fpm.conf

;;;;;;;;;;;;;;;;;;;;;

; FPM Configuration ;

;;;;;;;;;;;;;;;;;;;;;

; All relative paths in this configuration file are relative to PHP's install

; prefix.

; Include one or more files. If glob(3) exists, it is used to include a bunch of

; files from a glob(3) pattern. This directive can be used everywhere in the

; file.

include=/etc/php-fpm.d/*.conf	#php-fpm包含子配置文件路径

;;;;;;;;;;;;;;;;;;

; Global Options ;	全局选项配置

;;;;;;;;;;;;;;;;;;

[global]	#全局配置

; Pid file

; Default Value: none

pid = /run/php-fpm/php-fpm.pid	#指定php-fpm的pid文件路径

; Error log file

; If it's set to "syslog", log is sent to syslogd instead of being written

; in a local file.

; Default Value: /var/log/php-fpm.log

error_log = /var/log/php-fpm/error.log	#指定PHP错误日志文件路径

; syslog_facility is used to specify what type of program is logging the

; message. This lets syslogd specify that messages from different facilities

; will be handled differently.

; See syslog(3) for possible values (ex daemon equiv LOG_DAEMON)

; Default Value: daemon

;syslog.facility = daemon

; syslog_ident is prepended to every message. If you have multiple FPM

; instances running on the same server, you can change the default value

; which must suit common needs.

; Default Value: php-fpm

;syslog.ident = php-fpm

; Log level

; Possible Values: alert, error, warning, notice, debug

; Default Value: notice

;log_level = notice

; If this number of child processes exit with SIGSEGV or SIGBUS within the time

; interval set by emergency_restart_interval then FPM will restart. A value

; of '0' means 'Off'.

; Default Value: 0

;emergency_restart_threshold = 0

; Interval of time used by emergency_restart_interval to determine when

; a graceful restart will be initiated.  This can be useful to work around

; accidental corruptions in an accelerator's shared memory.

; Available Units: s(econds), m(inutes), h(ours), or d(ays)

; Default Unit: seconds

; Default Value: 0

;emergency_restart_interval = 0

; Time limit for child processes to wait for a reaction on signals from master.

; Available units: s(econds), m(inutes), h(ours), or d(ays)

; Default Unit: seconds

; Default Value: 0

;process_control_timeout = 0

; The maximum number of processes FPM will fork. This has been designed to control

; the global number of processes when using dynamic PM within a lot of pools.

; Use it with caution.

; Note: A value of 0 indicates no limit

; Default Value: 0

;process.max = 128

; Specify the nice(2) priority to apply to the master process (only if set)

; The value can vary from -19 (highest priority) to 20 (lowest priority)

; Note: - It will only work if the FPM master process is launched as root

;       - The pool process will inherit the master process priority

;         unless specified otherwise

; Default Value: no set

;process.priority = -19

; Send FPM to background. Set to 'no' to keep FPM in foreground for debugging.

; Default Value: yes

daemonize = yes	#是否开启守护进程模式

; Set open file descriptor rlimit for the master process.

; Default Value: system defined value

;rlimit_files = 1024

; Set max core size rlimit for the master process.

; Possible Values: 'unlimited' or an integer greater or equal to 0

; Default Value: system defined value

;rlimit_core = 0

; Specify the event mechanism FPM will use. The following is available:

; - select     (any POSIX os)

; - poll       (any POSIX os)

; - epoll      (linux >= 2.5.44)

; Default Value: not set (auto detection)

;events.mechanism = epoll

; When FPM is built with systemd integration, specify the interval,

; in seconds, between health report notification to systemd.

; Set to 0 to disable.

; Available Units: s(econds), m(inutes), h(ours)

; Default Unit: seconds

; Default value: 10

;systemd_interval = 10

;;;;;;;;;;;;;;;;;;;;

; Pool Definitions ;	#pool配置定义

;;;;;;;;;;;;;;;;;;;;

; Multiple pools of child processes may be started with different listening

; ports and different management options.  The name of the pool will be

; used in logs and stats. There is no limitation on the number of pools which

; FPM can handle. Your system will tell you anyway :)

; See /etc/php-fpm.d/*.conf

从php-fpm.conf这个文件上可以看到大部分都是以";"进行注释了，剩余以下几行的全局配置

[global]

pid = /run/php-fpm/php-fpm.pid #指定php-fpm的pid文件路径

error_log = /var/log/php-fpm/error.log #指定PHP错误日志文件路径

daemonize = yes #是否开启守护进程模式

而pool的配置需要在/etc/php-fpm.d/*.conf进行配置

[root@localhost vhost]# cat /etc/php-fpm.d/www.conf

; Start a new pool named 'www'.

; the variable $pool can we used in any directive and will be replaced by the

; pool name ('www' here)

[www]	#pool的名称，可以自定义

; Per pool prefix

; It only applies on the following directives:

; - 'access.log'

; - 'slowlog'

; - 'listen' (unixsocket)

; - 'chroot'

; - 'chdir'

; - 'php_values'

; - 'php_admin_values'

; When not set, the global prefix (or @php_fpm_prefix@) applies instead.

; Note: This directive can also be relative to the global prefix.

; Default Value: none

;prefix = /path/to/pools/$pool

; Unix user/group of processes

; Note: The user is mandatory. If the group is not set, the default user's group

;       will be used.

; RPM: apache user chosen to provide access to the same directories as httpd

user = www #配置php-fpm进程用户

; RPM: Keep a group allowed to write in log dir.

group = www #配置php-fpm进程用户组

; The address on which to accept FastCGI requests.

; Valid syntaxes are:

;   'ip.add.re.ss:port'    - to listen on a TCP socket to a specific IPv4 address on

;                            a specific port;

;   '[ip:6:addr:ess]:port' - to listen on a TCP socket to a specific IPv6 address on

;                            a specific port;

;   'port'                 - to listen on a TCP socket to all addresses

;                            (IPv6 and IPv4-mapped) on a specific port;

;   '/path/to/unix/socket' - to listen on a unix socket.

; Note: This value is mandatory.

listen = 127.0.0.1:9000

#指定监听的IP:port或者socket地址

#这个地址需要和nginx配置文件里面的那个fastcgi_pass所制定的地址一致，否则就会502

#如果监听的是socket文件，那么要保证nginx服务用户（nginx）对该socket文件有读写权限，否则502

; Set listen(2) backlog.

; Default Value: 511

;listen.backlog = 511

; Set permissions for unix socket, if one is used. In Linux, read/write

; permissions must be set in order to allow connections from a web server.

; Default Values: user and group are set as the running user

;                 mode is set to 0660

;listen.owner = nobody

;listen.group = nobody

;listen.mode = 0660

; When POSIX Access Control Lists are supported you can set them using

; these options, value is a comma separated list of user/group names.

; When set, listen.owner and listen.group are ignored

;listen.acl_users = apache,nginx

;listen.acl_groups =

; List of addresses (IPv4/IPv6) of FastCGI clients which are allowed to connect.

; Equivalent to the FCGI_WEB_SERVER_ADDRS environment variable in the original

; PHP FCGI (5.2.2+). Makes sense only with a tcp listening socket. Each address

; must be separated by a comma. If this value is left blank, connections will be

; accepted from any ip address.

; Default Value: any

listen.allowed_clients = 127.0.0.1	#允许FastCGI客户端连接的IPv4地址，多个地址用','分隔，为空则允许任何地址发来链接请求

; Specify the nice(2) priority to apply to the pool processes (only if set)

; The value can vary from -19 (highest priority) to 20 (lower priority)

; Note: - It will only work if the FPM master process is launched as root

;       - The pool processes will inherit the master process priority

;         unless it specified otherwise

; Default Value: no set

; process.priority = -19	#进程级别，默认

; Set the process dumpable flag (PR_SET_DUMPABLE prctl) even if the process user

; or group is differrent than the master process user. It allows to create process

; core dump and ptrace the process for the pool user.

; Default Value: no

; process.dumpable = yes

; Choose how the process manager will control the number of child processes.

; Possible Values:

;   static  - a fixed number (pm.max_children) of child processes;

;   dynamic - the number of child processes are set dynamically based on the

;             following directives. With this process management, there will be

;             always at least 1 children.

;             pm.max_children      - the maximum number of children that can

;                                    be alive at the same time.

;             pm.start_servers     - the number of children created on startup.

;             pm.min_spare_servers - the minimum number of children in 'idle'

;                                    state (waiting to process). If the number

;                                    of 'idle' processes is less than this

;                                    number then some children will be created.

;             pm.max_spare_servers - the maximum number of children in 'idle'

;                                    state (waiting to process). If the number

;                                    of 'idle' processes is greater than this

;                                    number then some children will be killed.

;  ondemand - no children are created at startup. Children will be forked when

;             new requests will connect. The following parameter are used:

;             pm.max_children           - the maximum number of children that

;                                         can be alive at the same time.

;             pm.process_idle_timeout   - The number of seconds after which

;                                         an idle process will be killed.

; Note: This value is mandatory.

pm = dynamic	#选择进程池管理器如何控制子进程的数量

　　static：　　对于子进程的开启数路给定一个锁定的值(pm.max_children)

　　dynamic:　 子进程的数目为动态的，它的数目基于下面的指令的值(以下为dynamic适用参数)

　　　　pm.max_children：  同一时刻能够存活的最大子进程的数量

　　　　pm.start_servers： 在启动时启动的子进程数量

　　　　pm.min_spare_servers： 处于空闲"idle"状态的最小子进程，如果空闲进程数量小于这个值，那么相应的子进程会被创建

　　　　pm.max_spare_servers： 最大空闲子进程数量，空闲子进程数量超过这个值，那么相应的子进程会被杀掉。

　　ondemand： 在启动时不会创建，只有当发起请求链接时才会创建(pm.max_children, pm.process_idle_timeout)

; The number of child processes to be created when pm is set to 'static' and the

; maximum number of child processes when pm is set to 'dynamic' or 'ondemand'.

; This value sets the limit on the number of simultaneous requests that will be

; served. Equivalent to the ApacheMaxClients directive with mpm_prefork.

; Equivalent to the PHP_FCGI_CHILDREN environment variable in the original PHP

; CGI. The below defaults are based on a server without much resources. Don't

; forget to tweak pm.* to fit your needs.

; Note: Used when pm is set to 'static', 'dynamic' or 'ondemand'

; Note: This value is mandatory.

pm.max_children = 50	#同一时刻能够存活的最大子进程的数量

; The number of child processes created on startup.

; Note: Used only when pm is set to 'dynamic'

; Default Value: min_spare_servers + (max_spare_servers - min_spare_servers) / 2

pm.start_servers = 5	#在启动时启动的子进程数量

; The desired minimum number of idle server processes.

; Note: Used only when pm is set to 'dynamic'

; Note: Mandatory when pm is set to 'dynamic'

pm.min_spare_servers = 5	#处于空闲"idle"状态的最小子进程，如果空闲进程数量小于这个值，那么相应的子进程会被创建

; The desired maximum number of idle server processes.

; Note: Used only when pm is set to 'dynamic'

; Note: Mandatory when pm is set to 'dynamic'

pm.max_spare_servers = 35	#最大空闲子进程数量，空闲子进程数量超过这个值，那么相应的子进程会被杀掉。

; The number of seconds after which an idle process will be killed.

; Note: Used only when pm is set to 'ondemand'

; Default Value: 10s

;pm.process_idle_timeout = 10s;		#空闲进程超时时间,默认10s

; The number of requests each child process should execute before respawning.

; This can be useful to work around memory leaks in 3rd party libraries. For

; endless request processing specify '0'. Equivalent to PHP_FCGI_MAX_REQUESTS.

; Default Value: 0

pm.max_requests = 500

#在派生新的子进程前，每一个子进程应该处理的请求数目，在第三方库中解决内存溢出很有用，设置为0则不会限制。默认值为0。

举个例子，假设php-fpm中配置的单个子进程处理请求数为500；此时nginx把php的请求发送到php-fpm，此时php-fpm进行处理最大为500个请求，请求到限制后，会自动销毁该子进程，避免内存溢出。

; The URI to view the FPM status page. If this value is not set, no URI will be

; recognized as a status page. It shows the following informations:

;   pool                 - the name of the pool;

;   process manager      - static, dynamic or ondemand;

;   start time           - the date and time FPM has started;

;   start since          - number of seconds since FPM has started;

;   accepted conn        - the number of request accepted by the pool;

;   listen queue         - the number of request in the queue of pending

;                          connections (see backlog in listen(2));

;   max listen queue     - the maximum number of requests in the queue

;                          of pending connections since FPM has started;

;   listen queue len     - the size of the socket queue of pending connections;

;   idle processes       - the number of idle processes;

;   active processes     - the number of active processes;

;   total processes      - the number of idle + active processes;

;   max active processes - the maximum number of active processes since FPM

;                          has started;

;   max children reached - number of times, the process limit has been reached,

;                          when pm tries to start more children (works only for

;                          pm 'dynamic' and 'ondemand');

; Value are updated in real time.

; Example output:

;   pool:                 www

;   process manager:      static

;   start time:           01/Jul/2011:17:53:49 +0200

;   start since:          62636

;   accepted conn:        190460

;   listen queue:         0

;   max listen queue:     1

;   listen queue len:     42

;   idle processes:       4

;   active processes:     11

;   total processes:      15

;   max active processes: 12

;   max children reached: 0

;

; By default the status page output is formatted as text/plain. Passing either

; 'html', 'xml' or 'json' in the query string will return the corresponding

; output syntax. Example:

;   http://www.foo.bar/status

;   http://www.foo.bar/status?json

;   http://www.foo.bar/status?html

;   http://www.foo.bar/status?xml

;

; By default the status page only outputs short status. Passing 'full' in the

; query string will also return status for each pool process.

; Example:

;   http://www.foo.bar/status?full

;   http://www.foo.bar/status?json&full

;   http://www.foo.bar/status?html&full

;   http://www.foo.bar/status?xml&full

; The Full status returns for each process:

;   pid                  - the PID of the process;

;   state                - the state of the process (Idle, Running, ...);

;   start time           - the date and time the process has started;

;   start since          - the number of seconds since the process has started;

;   requests             - the number of requests the process has served;

;   request duration     - the duration in µs of the requests;

;   request method       - the request method (GET, POST, ...);

;   request URI          - the request URI with the query string;

;   content length       - the content length of the request (only with POST);

;   user                 - the user (PHP_AUTH_USER) (or '-' if not set);

;   script               - the main script called (or '-' if not set);

;   last request cpu     - the %cpu the last request consumed

;                          it's always 0 if the process is not in Idle state

;                          because CPU calculation is done when the request

;                          processing has terminated;

;   last request memory  - the max amount of memory the last request consumed

;                          it's always 0 if the process is not in Idle state

;                          because memory calculation is done when the request

;                          processing has terminated;

; If the process is in Idle state, then informations are related to the

; last request the process has served. Otherwise informations are related to

; the current request being served.

; Example output:

;   ************************

;   pid:                  31330

;   state:                Running

;   start time:           01/Jul/2011:17:53:49 +0200

;   start since:          63087

;   requests:             12808

;   request duration:     1250261

;   request method:       GET

;   request URI:          /test_mem.php?N=10000

;   content length:       0

;   user:                 -

;   script:               /home/fat/web/docs/php/test_mem.php

;   last request cpu:     0.00

;   last request memory:  0

;

; Note: There is a real-time FPM status monitoring sample web page available

;       It's available in: @EXPANDED_DATADIR@/fpm/status.html

;

; Note: The value must start with a leading slash (/). The value can be

;       anything, but it may not be a good idea to use the .php extension or it

;       may conflict with a real PHP file.

; Default Value: not set

pm.status_path = /status	#定义查看php-fpm的状态页，默认不配置

状态页描述：

　　accepted conn: 该进程池接受的请求数量

　　pool: 进程池的名字

　　process manager: 进程管理，就是配置中pm指令，可以选择值static，dynamic，ondemand

　　idle processes: 空闲进程数量

　　active processes: 当前活跃的进程数量

　　total processes: 总的进程数量=idle+active

　　max children reached: 达到最大子进程的次数，达到进程的限制，当pm试图开启更多的子进程的时候(仅当pm工作在dynamic时)

　　

; The ping URI to call the monitoring page of FPM. If this value is not set, no

; URI will be recognized as a ping page. This could be used to test from outside

; that FPM is alive and responding, or to

; - create a graph of FPM availability (rrd or such);

; - remove a server from a group if it is not responding (load balancing);

; - trigger alerts for the operating team (24/7).

; Note: The value must start with a leading slash (/). The value can be

;       anything, but it may not be a good idea to use the .php extension or it

;       may conflict with a real PHP file.

; Default Value: not set

;ping.path = /ping	#该ping URI将会去调用fpm监控页面，如果这个没有设置，那么不会有URI被做为ping页

; This directive may be used to customize the response of a ping request. The

; response is formatted as text/plain with a 200 response code.

; Default Value: pong

;ping.response = pong	#用于定制平请求的响应，响应的格式text/plain(对200响应代码)

; The access log file

; Default: not set

;access.log = log/$pool.access.log	#访问日志记录，默认不配置

; The access log format.

; The following syntax is allowed

;  %%: the '%' character

;  %C: %CPU used by the request

;      it can accept the following format:

;      - %{user}C for user CPU only

;      - %{system}C for system CPU only

;      - %{total}C  for user + system CPU (default)

;  %d: time taken to serve the request

;      it can accept the following format:

;      - %{seconds}d (default)

;      - %{miliseconds}d

;      - %{mili}d

;      - %{microseconds}d

;      - %{micro}d

;  %e: an environment variable (same as $_ENV or $_SERVER)

;      it must be associated with embraces to specify the name of the env

;      variable. Some exemples:

;      - server specifics like: %{REQUEST_METHOD}e or %{SERVER_PROTOCOL}e

;      - HTTP headers like: %{HTTP_HOST}e or %{HTTP_USER_AGENT}e

;  %f: script filename

;  %l: content-length of the request (for POST request only)

;  %m: request method

;  %M: peak of memory allocated by PHP

;      it can accept the following format:

;      - %{bytes}M (default)

;      - %{kilobytes}M

;      - %{kilo}M

;      - %{megabytes}M

;      - %{mega}M

;  %n: pool name

;  %o: output header

;      it must be associated with embraces to specify the name of the header:

;      - %{Content-Type}o

;      - %{X-Powered-By}o

;      - %{Transfert-Encoding}o

;      - ....

;  %p: PID of the child that serviced the request

;  %P: PID of the parent of the child that serviced the request

;  %q: the query string

;  %Q: the '?' character if query string exists

;  %r: the request URI (without the query string, see %q and %Q)

;  %R: remote IP address

;  %s: status (response code)

;  %t: server time the request was received

;      it can accept a strftime(3) format:

;      %d/%b/%Y:%H:%M:%S %z (default)

;      The strftime(3) format must be encapsuled in a %{<strftime_format>}t tag

;      e.g. for a ISO8601 formatted timestring, use: %{%Y-%m-%dT%H:%M:%S%z}t

;  %T: time the log has been written (the request has finished)

;      it can accept a strftime(3) format:

;      %d/%b/%Y:%H:%M:%S %z (default)

;      The strftime(3) format must be encapsuled in a %{<strftime_format>}t tag

;      e.g. for a ISO8601 formatted timestring, use: %{%Y-%m-%dT%H:%M:%S%z}t

;  %u: remote user

;

; Default: "%R - %u %t \"%m %r\" %s"

;access.format = "%R - %u %t \"%m %r%Q%q\" %s %f %{mili}d %{kilo}M %C%%"	#访问日志格式定义

; The log file for slow requests

; Default Value: not set

; Note: slowlog is mandatory if request_slowlog_timeout is set

slowlog = /var/log/php-fpm/www-slow.log		#慢日志路径定义

; The timeout for serving a single request after which a PHP backtrace will be

; dumped to the 'slowlog' file. A value of '0s' means 'off'.

; Available units: s(econds)(default), m(inutes), h(ours), or d(ays)

; Default Value: 0

;request_slowlog_timeout = 0	#慢日志请求超时时间，对一个php程序进行跟踪。

; The timeout for serving a single request after which the worker process will

; be killed. This option should be used when the 'max_execution_time' ini option

; does not stop script execution for some reason. A value of '0' means 'off'.

; Available units: s(econds)(default), m(inutes), h(ours), or d(ays)

; Default Value: 0

;request_terminate_timeout = 0

#终止请求超时时间，在worker进程被杀掉之后，提供单个请求的超时间隔。由于某种原因不停止脚本执行时，应该使用该选项，0表示关闭不启用。

#(在php.ini中，max_execution_time 一般设置为30，表示每一个脚本的最大执行时间)

; Set open file descriptor rlimit.

; Default Value: system defined value

;rlimit_files = 1024	#定义php-fpm进程可以打开的文件句柄数量

; Set max core size rlimit.

; Possible Values: 'unlimited' or an integer greater or equal to 0

; Default Value: system defined value

;rlimit_core = 0	# 设置内核对资源的使用限制，用于内核转储

; Chroot to this directory at the start. This value must be defined as an

; absolute path. When this value is not set, chroot is not used.

; Note: you can prefix with '$prefix' to chroot to the pool prefix or one

; of its subdirectories. If the pool prefix is not set, the global prefix

; will be used instead.

; Note: chrooting is a great security feature and should be used whenever

;       possible. However, all PHP paths will be relative to the chroot

;       (error_log, sessions.save_path, ...).

; Default Value: not set

;chroot =	#设置chroot路径，程序一启动就将其chroot放置到指定的目录下，该指令值必须是一个绝对路径

; Chdir to this directory at the start.

; Note: relative path can be used.

; Default Value: current directory or / when chroot

;chdir = /var/www #在程序启动时将会改变到指定的位置(这个是相对路径，相对当前路径或chroot后的“/”目录)　

; Redirect worker stdout and stderr into main error log. If not set, stdout and

; stderr will be redirected to /dev/null according to FastCGI specs.

; Note: on highloaded environement, this can cause some delay in the page

; process time (several ms).

; Default Value: no

;catch_workers_output = yes

#将worker的标准输出和错误输出重定向到主要的错误日志记录中，如果没有设置，根据FastCGI的指定，将会被重定向到/dev/null上

; Clear environment in FPM workers

; Prevents arbitrary environment variables from reaching FPM worker processes

; by clearing the environment in workers before env vars specified in this

; pool configuration are added.

; Setting to "no" will make all environment variables available to PHP code

; via getenv(), $_ENV and $_SERVER.

; Default Value: yes

;clear_env = no	#清理环境

; Limits the extensions of the main script FPM will allow to parse. This can

; prevent configuration mistakes on the web server side. You should only limit

; FPM to .php extensions to prevent malicious users to use other extensions to

; exectute php code.

; Note: set an empty value to allow all extensions.

; Default Value: .php

;security.limit_extensions = .php .php3 .php4 .php5 .php7	#限制FPM执行解析的扩展名

; Pass environment variables like LD_LIBRARY_PATH. All $VARIABLEs are taken from

; the current environment.

; Default Value: clean env

;env[HOSTNAME] = $HOSTNAME

;env[PATH] = /usr/local/bin:/usr/bin:/bin

;env[TMP] = /tmp

;env[TMPDIR] = /tmp

;env[TEMP] = /tmp

; Additional php.ini defines, specific to this pool of workers. These settings

; overwrite the values previously defined in the php.ini. The directives are the

; same as the PHP SAPI:

;   php_value/php_flag             - you can set classic ini defines which can

;                                    be overwritten from PHP call 'ini_set'.

;   php_admin_value/php_admin_flag - these directives won't be overwritten by

;                                     PHP call 'ini_set'

; For php_*flag, valid values are on, off, 1, 0, true, false, yes or no.

; Defining 'extension' will load the corresponding shared extension from

; extension_dir. Defining 'disable_functions' or 'disable_classes' will not

; overwrite previously defined php.ini values, but will append the new value

; instead.

; Note: path INI options can be relative and will be expanded with the prefix

; (pool, global or @prefix@)

; Default Value: nothing is defined by default except the values in php.ini and

;                specified at startup with the -d argument

;php_admin_value[sendmail_path] = /usr/sbin/sendmail -t -i -f www@my.domain.com

;php_flag[display_errors] = off		#php错误标记展示，默认关闭

php_admin_value[error_log] = /var/log/php-fpm/www-error.log	#错误日志路径定义

php_admin_flag[log_errors] = on	#错误日志是否开启

php_admin_value[error_reporting] = E_ALL	#定义日志级别

php_admin_value[open_basedir] = /data/web:/tmp	#定义php能够访问的路径，也可以在php.ini中定义

;php_admin_value[memory_limit] = 128M	#php-fpm内存使用限制

; Set the following data paths to directories owned by the FPM process user.

;

; Do not change the ownership of existing system directories, if the process

; user does not have write permission, create dedicated directories for this

; purpose.

;

; See warning about choosing the location of these directories on your system

; at http://php.net/session.save-path

php_value[session.save_handler] = files    #定义session保存方式，以文件进行保存

php_value[session.save_path]    = /var/lib/php/session    #session保存路径

php_value[soap.wsdl_cache_dir]  = /var/lib/php/wsdlcache    #wsdl缓存路径定义

;php_value[opcache.file_cache]  = /var/lib/php/opcache    #opcache缓存路径

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