zend_extension=opcache.so #这样去加扩展
opcache.memory_consumption=128 #为opcache分配多少共享内存128M
opcache.interned_strings_buffer=8 #interned string的内存大小
opcache.max_accelerated_files=4000 #最大缓存的文件数目
opcache.revalidate_freq=300 #opcache自动检测文件是否更新的周期，单位秒
opcache.fast_shutdown=1 ##如果启用,快速关闭序列用于加速代码
opcache.enable_cli=1 #是否在CLI（即命令行时）启用opcache 1启用
; Determines if Zend OPCache is enabled
;opcache.enable=0 #是否启用opcache 1启用
; Determines if Zend OPCache is enabled for the CLI version of PHP
;opcache.enable_cli=0 #是否在CLI（即命令行时）启用opcache 1启用
; The OPcache shared memory storage size.
;opcache.memory_consumption=64 #为opcache分配多少共享内存，单位M
; The amount of memory for interned strings in Mbytes.
;opcache.interned_strings_buffer=4 #interned string的内存大小
; The maximum number of keys (scripts) in the OPcache hash table.
; Only numbers between 200 and 100000 are allowed.
;opcache.max_accelerated_files=2000 #最大缓存的文件数目。实际上这个值会使用第一个大于你配置的数字的下列素数{ 223, 463, 983, 1979, 3907, 7963, 16229, 32531, 65407, 130987 }，如你将该值指定为400，则实际上该值为463.
; The maximum percentage of "wasted" memory until a restart is scheduled.
;opcache.max_wasted_percentage=5 #
; When this directive is enabled, the OPcache appends the current working
; directory to the script key, thus eliminating possible collisions between
; files with the same name (basename). Disabling the directive improves
; performance, but may break existing applications.
;opcache.use_cwd=1 #如果置为1，则将当前路径加入到文件key中，以避免可能产生的同文件名的文件key冲突
; When disabled, you must reset the OPcache manually or restart the
; webserver for changes to the filesystem to take effect.
;opcache.validate_timestamps=1 #如果置为1，则OPCACHE会自动检测文件的时间戳（检测周期为revalidate_freq),并根据文件的时间戳来更新opcode,如果置为0，则只能手动去重启opcache或重启webserver以使更新后的php文件生效
; How often (in seconds) to check file timestamps for changes to the shared
; memory storage allocation. ("1" means validate once per second, but only
; once per request. "0" means always validate)
;opcache.revalidate_freq=2 #opcache自动检测文件是否更新的周期，单位秒。如果是0，则每次请求时opcache都要进行检测。当validate_timestamps为0时，本指令无效。
; Enables or disables file search in include_path optimization
;opcache.revalidate_path=0 #
; If disabled, all PHPDoc comments are dropped from the code to reduce the
; size of the optimized code.
;opcache.save_comments=1 #是否禁用文件中的注释
; If disabled, PHPDoc comments are not loaded from SHM, so "Doc Comments"
; may be always stored (save_comments=1), but not loaded by applications
; that don‘t need them anyway.
;opcache.load_comments=1 #如果禁用，注释不会被加载，就是不禁用，注释也不会被应用程序加载
; If enabled, a fast shutdown sequence is used for the accelerated code
;opcache.fast_shutdown=0 #如果启用,快速关闭序列用于加速代码
; Allow file existence override (file_exists, etc.) performance feature.
;opcache.enable_file_override=0 #允许文件存在覆盖(file_exists等)性能特性。
; A bitmask, where each bit enables or disables the appropriate OPcache
; passes
;opcache.optimization_level=0xffffffff #位掩码,每一位启用或禁用相应的OPcache
;opcache.inherited_hack=1
;opcache.dups_fix=0 #为解决“cannot redecllare class" 时，可将其置为1
; The location of the OPcache blacklist file (wildcards allowed).
; Each OPcache blacklist file is a text file that holds the names of files
; that should not be accelerated. The file format is to add each filename
; to a new line. The filename may be a full path or just a file prefix
; (i.e., /var/www/x blacklists all the files and directories in /var/www
; that start with ‘x‘). Line starting with a ; are ignored (comments).
;opcache.blacklist_filename= #黑名单文件设置
; Allows exclusion of large files from being cached. By default all files
; are cached.
;opcache.max_file_size=0 #允许排除大文件缓存。在默认情况下所有文件缓存。
; Check the cache checksum each N requests.
; The default value of "0" means that the checks are disabled.
;opcache.consistency_checks=0 #每N个请求检查缓存校验，默认值“0”意味着检查禁用。开启检查有损性能，所以仅在调试时开启
; How long to wait (in seconds) for a scheduled restart to begin if the cache
; is not being accessed.
;opcache.force_restart_timeout=180 #缓存中没有被访问多长时间(以秒为单位)调度重启。
; OPcache error_log file name. Empty string assumes "stderr".
;opcache.error_log= #留空表示标准错误输出
; All OPcache errors go to the Web server log.
; By default, only fatal errors (level 0) or errors (level 1) are logged.
; You can also enable warnings (level 2), info messages (level 3) or
; debug messages (level 4).
;opcache.log_verbosity_level=1 #所有OPcache错误导向Web服务器日志。默认情况下,只有致命错误(0级)或错误(1级)被记录。你也可以启用警告(要求等级2),信息消息(3级)或调试消息(四级)。
; Preferred Shared Memory back-end. Leave empty and let the system decide.
;opcache.preferred_memory_model= #首选的共享内存的后端。留空,让系统决定。
; Protect the shared memory from unexpected writing during script execution.
; Useful for internal debugging only.
;opcache.protect_memory=0 #在脚本执行期间保护的共享内存被意外写入。仅供内部调试。