phpmanual的简单介绍
php内存分配怎么理解
1、内存检查，如果太大则报错
2、如果命中缓存，则使用fastcache中内存块
3、在zendMM中heap层根据申请大小从小块内存、大块内存、剩余内存中查找合适内存
4、如果还没合适的，则直接再申请一块内存
5、重设heap状态
6、返回内存地址、标志变量维护
学习PHP要从哪开始？
PHP需要掌握的知识还是比较多的，最基本的比如：PHP基本的语法、php框架以及CMS、mysql数据库设计表、mysql数据库的基本SQL语句。现在一般PHP的都得会前端，那就包括：js/ajax、html、css。如果更高点层次的就是linux服务器。
PHP攻城狮践行学习路线图：
1、用集成环境安装PHP环境，一定要记住这一点，不要自己分开去装，尤其是自学的朋友。不然你会觉得很复杂，会没有信心学下去的。也要注意任何高手都不是一蹴而就的，是一步一步，不同的阶段历练才有最后的沉淀。
2、先了解一些基本的变量类型，语法，函数，基本逻辑，写简单的代码。前期以尝试，培养兴趣为主。这段时间是打基础很好的时候，这个会影响你后面的发展，不过也可以在后期去完善。
3、这时候你可能觉得PHP就这样，没什么难度，或者有的觉得太难了，简直一脸疑惑。这个到底有什么用。在这时候一定要坚持下来，可以试试先放一下，别太较真。慢慢的困惑你的会被你领悟的。这时，建议学习html+css+js,缓解自己的压力，这个相对简单,简历信心。尤其是js，总结其实有相同的思路，可以结合着一起体会。
4、这些都感觉有80%了解就可以先放放了，现在在学习MySQL，也是先了解基础的。这个是干什么的，我可以用它做什么。因为之前装的集成环境。为什么感觉是凌乱的，我想告诉你的是，一是不要在自己没能力解决问题的时候死磕，浪费时间，丧失信心。这时候我们要做的是学习壮大自己，不要灰心。二是我本来觉得这一切都了解才是完整的。我们的目标也是要把这些都做好，这才是一个合格的PHP程序员。
5、这一切都顺利的话，你基本离预设的目标不远了，完成了整个学习的70%了。后面的是在之前的基础上升华。把HTML和css、js结合、静态文件和PHP结合、PHP和MySQL结合。这个阶段可能越到的问题会异常的多，一定要学会解决问题。网上很多都是答案，同样你要学会问问题。
6、这些之后你基本已经快到学习的尾声了，但还缺少经验。这时，你可以看一些网上开源的cms，例如织梦，国内用的多，越到问题好解决。看看一些视频（网上免费的很多），查漏补缺，总结归纳形成自己的知识体系。是时候该准备庆祝下自己这段的时间没有白费（一般2到3各月，看平时每天花的时间），基本成为一个合格的PHP程序员了。也该恭喜你了，其实并不那么难。坚持，坚持；努力，努力；学习，学习
PHP可以做什么
PHP可以做什么
PHP属于后起之秀，吸收了java和c以及perl等语言优点，专注互联网领域。WEB领域PHP拥有得天独厚的优势，WEB领域没有语言可以和他比。将来一定是互联网的天下。互联网离不开WEB，WEB离不开PHP。那么PHP可以做什么？一起来看看PHP的用途吧！
PC端网站开发
60%全球互联网网站采用php技术，80%国内互联网网站使用php开发。这些网站包含购物网站，政府企业网站，QQ空间，论坛博客等等。
移动端微网站开发
移动设备的普及为移动互联网的快速发展奠定了基础!手机淘宝网站，手机京东网站等等， 微信公众号应用中的微网站。 将来微网站和公众号肯定会取代APP的地位!
APP后台开发
APP后台开发也是移动互联网发展的一个产物。大多数网站为了让用户在手机上能够得到更好体验效果，都加入开发APP的开发行列中。而PHP后端技术将会作为他们的不二选择。
PHP主要用来做网站开发，许多小型网站都用PHP开发，PHP是开源的，这是使得PHP经久不衰的原因。在电商、社区等方面，PHP具备非常成熟的开源代码和模板，因此使得PHP应用极为广泛。
php-fpm的安装目录
下面是我的平时的环境搭建php的各种安装目录，大家的基本也差不多。
centos等linux平台
1./usr/local/php/php
2./usr/local/php/etc/php.ini
3./usr/local/php/sbin/php-fpm
4./usr/local/php/etc/php-fpm.conf
mac平台
1./usr/bin/php
2./etc/php.ini
3./usr/bin/php-fpm
4./etc/php-fpm.conf
由于我开发以Mac为主，所以就用Mac的环境配置来学习。
php-fpm配置详解
这是搜索的一份还算算比较详细的php-fpm.conf配置详解，我会针对性的修改下，当然php手册上也有详细的讲解：
1.pid = /usr/local/var/run/php-fpm.pid
2.#pid设置，一定要开启,上面是Mac平台的。默认在php安装目录中的var/run/php-fpm.pid。比如centos的在: /usr/local/php/var/run/php-fpm.pid
3.
4.error_log ?= /usr/local/var/log/php-fpm.log
5.#错误日志，上面是Mac平台的，默认在php安装目录中的var/log/php-fpm.log，比如centos的在: /usr/local/php/var/log/php-fpm.log
6.
7.log_level = notice
8.#错误级别. 上面的php-fpm.log纪录的登记。可用级别为: alert（必须立即处理）, error（错误情况）, warning（警告情况）, notice（一般重要信息）, debug（调试信息）. 默认: notice.
9.
10.emergency_restart_threshold = 60
11.emergency_restart_interval = 60s
12.#表示在emergency_restart_interval所设值内出现SIGSEGV或者SIGBUS错误的php-cgi进程数如果超过 emergency_restart_threshold个，php-fpm就会优雅重启。这两个选项一般保持默认值。0 表示 '关闭该功能'. 默认值: 0 (关闭).
13.
14.process_control_timeout = 0
15.#设置子进程接受主进程复用信号的超时时间. 可用单位: s(秒), m(分), h(小时), 或者 d(天) 默认单位: s(秒). 默认值: 0.
16.
17.daemonize = yes
18.#后台执行fpm,默认值为yes，如果为了调试可以改为no。在FPM中，可以使用不同的设置来运行多个进程池。 这些设置可以针对每个进程池单独设置。
19.
20.listen = 127.0.0.1:9000
21.#fpm监听端口，即nginx中php处理的地址，一般默认值即可。可用格式为: 'ip:port', 'port', '/path/to/unix/socket'. 每个进程池都需要设置。如果nginx和php在不同的机器上，分布式处理，就设置ip这里就可以了。
22.
23.listen.backlog = -1
24.#backlog数，设置 listen 的半连接队列长度，-1表示无限制，由操作系统决定，此行注释掉就行。backlog含义参考：
25.
26.listen.allowed_clients = 127.0.0.1
27.#允许访问FastCGI进程的IP白名单，设置any为不限制IP，如果要设置其他主机的nginx也能访问这台FPM进程，listen处要设置成本地可被访问的IP。默认值是any。每个地址是用逗号分隔. 如果没有设置或者为空，则允许任何服务器请求连接。
28.
29.listen.owner = www
30.listen.group = www
31.listen.mode = 0666
32.#unix socket设置选项，如果使用tcp方式访问，这里注释即可。
33.
34.user = www
35.group = www
36.#启动进程的用户和用户组，FPM 进程运行的Unix用户, 必须要设置。用户组，如果没有设置，则默认用户的组被使用。
37.
38.pm = dynamic
39.#php-fpm进程启动模式，pm可以设置为static和dynamic和ondemand
40.#如果选择static，则进程数就数固定的，由pm.max_children指定固定的子进程数。
41.
42.#如果选择dynamic，则进程数是动态变化的,由以下参数决定：
43.pm.max_children = 50 #子进程最大数
44.pm.start_servers = 2 #启动时的进程数，默认值为: min_spare_servers + (max_spare_servers - min_spare_servers) / 2
45.pm.min_spare_servers = 1 #保证空闲进程数最小值，如果空闲进程小于此值，则创建新的子进程
46.pm.max_spare_servers = 3 #，保证空闲进程数最大值，如果空闲进程大于此值，此进行清理
47.
48.pm.max_requests = 500
49.#设置每个子进程重生之前服务的请求数. 对于可能存在内存泄漏的第三方模块来说是非常有用的. 如果设置为 '0' 则一直接受请求. 等同于 PHP_FCGI_MAX_REQUESTS 环境变量. 默认值: 0.
50.
51.pm.status_path = /status
52.#FPM状态页面的网址. 如果没有设置, 则无法访问状态页面. 默认值: none. munin监控会使用到
53.
54.ping.path = /ping
55.#FPM监控页面的ping网址. 如果没有设置, 则无法访问ping页面. 该页面用于外部检测FPM是否存活并且可以响应请求. 请注意必须以斜线开头 (/)。
56.
57.ping.response = pong
58.#用于定义ping请求的返回相应. 返回为 HTTP 200 的 text/plain 格式文本. 默认值: pong.
59.
60.access.log = log/$pool.access.log
61.#每一个请求的访问日志，默认是关闭的。
62.
63.access.format = "%R - %u %t \"%m %r%Q%q\" %s %f %{mili}d %{kilo}M %C%%"
64.#设定访问日志的格式。
65.
66.slowlog = log/$pool.log.slow
67.#慢请求的`记录日志,配合request_slowlog_timeout使用，默认关闭
68.
69.request_slowlog_timeout = 10s
70.#当一个请求该设置的超时时间后，就会将对应的PHP调用堆栈信息完整写入到慢日志中. 设置为 '0' 表示 'Off'
71.
72.request_terminate_timeout = 0
73.#设置单个请求的超时中止时间. 该选项可能会对php.ini设置中的'max_execution_time'因为某些特殊原因没有中止运行的脚本有用. 设置为 '0' 表示 'Off'.当经常出现502错误时可以尝试更改此选项。
74.
75.rlimit_files = 1024
76.#设置文件打开描述符的rlimit限制. 默认值: 系统定义值默认可打开句柄是1024，可使用 ulimit -n查看，ulimit -n 2048修改。
77.
78.rlimit_core = 0
79.#设置核心rlimit最大限制值. 可用值: 'unlimited' 、0或者正整数. 默认值: 系统定义值.
80.
81.chroot =
82.#启动时的Chroot目录. 所定义的目录需要是绝对路径. 如果没有设置, 则chroot不被使用.
83.
84.chdir =
85.#设置启动目录，启动时会自动Chdir到该目录. 所定义的目录需要是绝对路径. 默认值: 当前目录，或者/目录（chroot时）
86.
87.catch_workers_output = yes
88.#重定向运行过程中的stdout和stderr到主要的错误日志文件中. 如果没有设置, stdout 和 stderr 将会根据FastCGI的规则被重定向到 /dev/null . 默认值: 空.
当然还有一些无关紧要的设置，用到了再说吧。
一些重要的设置
php-fpm进程分配
在之前的文章中就说过了。在fasgcgi模式下，php会启动多个php-fpm进程，来接收nginx发来的请求，那是不是进程越多，速度就越快呢？这可不一定！得根据我们的机器配置和业务量来决定。
我们先来看下，设定进程的配置在哪里？
pm = static | dynamic | ondemand
pm可以设置成这样3种，我们用的最多的就上前面2种。
pm = static 模式
pm = static 表示我们创建的php-fpm子进程数量是固定的，那么就只有pm.max_children = 50这个参数生效。你启动php-fpm的时候就会一起全部启动51(1个主＋50个子)个进程，颇为壮观。
pm = dynamic 模式
pm = dynamic模式，表示启动进程是动态分配的，随着请求量动态变化的。他由 pm.max_children，pm.start_servers，pm.min_spare_servers，pm.max_spare_servers 这几个参数共同决定。
上面已经讲过，这里再重申一下吧：
pm.max_children ＝ 50 是最大可创建的子进程的数量。必须设置。这里表示最多只能50个子进程。
pm.start_servers = 20 随着php-fpm一起启动时创建的子进程数目。默认值：min_spare_servers + (max_spare_servers - min_spare_servers) / 2。这里表示，一起启动会有20个子进程。
pm.min_spare_servers = 10
设置服务器空闲时最小php-fpm进程数量。必须设置。如果空闲的时候，会检查如果少于10个，就会启动几个来补上。
pm.max_spare_servers = 30
设置服务器空闲时最大php-fpm进程数量。必须设置。如果空闲时，会检查进程数，多于30个了，就会关闭几个，达到30个的状态。
到底选择static还数dynamic?
很多人恐惧症来袭，不知道选什么好？
一般原则是：动态适合小内存机器，灵活分配进程，省内存。静态适用于大内存机器，动态创建回收进程对服务器资源也是一种消耗。
如果你的内存很大，有8-20G，按照一个php-fpm进程20M算，100个就2G内存了，那就可以开启static模式。如果你的内存很小，比如才256M，那就要小心设置了，因为你的机器里面的其他的进程也算需要占用内存的，所以设置成dynamic是最好的，比如：pm.max_chindren = 8, 占用内存160M左右，而且可以随时变化，对于一半访问量的网站足够了。
慢日志查询
我们有时候会经常饱受500,502问题困扰。当nginx收到如上错误码时，可以确定后端php-fpm解析php出了某种问题，比如，执行错误，执行超时。
这个时候，我们是可以开启慢日志功能的。
slowlog = /usr/local/var/log/php-fpm.log.slow
request_slowlog_timeout = 15s
当一个请求该设置的超时时间15秒后，就会将对应的PHP调用堆栈信息完整写入到慢日志中。
php-fpm慢日志会记录下进程号，脚本名称，具体哪个文件哪行代码的哪个函数执行时间过长：
1.[21-Nov-2013 14:30:38] [pool www] pid 11877
2.script_filename = /usr/local/lnmp/nginx/html/
3.[0xb70fb88c] file_get_contents() /usr/local/lnmp/nginx/html/
通过日志，我们就可以知道第2行的file_get_contents 函数有点问题，这样我们就能追踪问题了。
;
php安装的问题，无法载入 mysql 扩展，请检查 PHP 配置
首先你需要将PHP安装目录下的php_mysql.dll和php_mysqli.dll（我的在D:\apptools\php5\ext目录下）复制到c:\windows\system32目录下，然后修改php.ini文件（需要放到c:\windows目录下），关键是extension=php_mysql.dll 和extension_dir = "D:/apptools/php5/ext"。
我的配置是这样的：
[PHP]
;;;;;;;;;;;
; WARNING ;
;;;;;;;;;;;
; This is the default settings file for new PHP installations.
; By default, PHP installs itself with a configuration suitable for
; development purposes, and *NOT* for production purposes.
; For several security-oriented considerations that should be taken
; before going online with your site, please consult php.ini-recommended
; and .
;;;;;;;;;;;;;;;;;;;
; About php.ini ;
;;;;;;;;;;;;;;;;;;;
; This file controls many aspects of PHP's behavior. In order for PHP to
; read it, it must be named 'php.ini'. PHP looks for it in the current
; working directory, in the path designated by the environment variable
; PHPRC, and in the path that was defined in compile time (in that order).
; Under Windows, the compile-time path is the Windows directory. The
; path in which the php.ini file is looked for can be overridden using
; the -c argument in command line mode.
;
; 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 are specified using the following syntax:
; directive = value
; Directive names are *case sensitive* - foo=bar is different from FOO=bar.
;
; 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), or a quoted string ("foo").
;
; Expressions in the INI file are limited to bitwise operators and parentheses:
; | bitwise OR
; 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 ;
;;;;;;;;;;;;;;;;;;;
; All the values in the php.ini-dist file correspond to the builtin
; defaults (that is, if no php.ini is used, or if you delete these lines,
; the builtin defaults will be identical).
;;;;;;;;;;;;;;;;;;;;
; Language Options ;
;;;;;;;;;;;;;;;;;;;;
; Enable the PHP scripting language engine under Apache.
engine = On
; Enable compatibility mode with Zend Engine 1 (PHP 4.x)
zend.ze1_compatibility_mode = Off
; Allow the ? tag. Otherwise, only ?php and script tags are recognized.
; NOTE: Using short tags should be avoided when developing applications or
; libraries that are meant for redistribution, or deployment on PHP
; servers which are not under your control, because short tags may not
; be supported on the target server. For portable, redistributable code,
; be sure not to use short tags.
short_open_tag = On
; Allow ASP-style % % tags.
asp_tags = Off
; The number of significant digits displayed in floating point numbers.
precision = 12
; Enforce year 2000 compliance (will cause problems with non-compliant browsers)
y2k_compliance = On
; Output buffering allows you to send header lines (including cookies) even
; after you send body content, at the price of slowing PHP's output layer a
; bit. You can enable output buffering during runtime by calling the output
; buffering functions. You can also enable output buffering for all files by
; setting this directive to On. If you wish to limit the size of the buffer
; to a certain size - you can use a maximum number of bytes instead of 'On', as
; a value for this directive (e.g., output_buffering=4096).
output_buffering = On
; You can redirect all of the output of your scripts to a function. For
; example, if you set output_handler to "mb_output_handler", character
; encoding will be transparently converted to the specified encoding.
; Setting any output handler automatically turns on output buffering.
; Note: People who wrote portable scripts should not depend on this ini
; directive. Instead, explicitly set the output handler using ob_start().
; Using this ini directive may cause problems unless you know what script
; is doing.
; Note: You cannot use both "mb_output_handler" with "ob_iconv_handler"
; and you cannot use both "ob_gzhandler" and "zlib.output_compression".
; Note: output_handler must be empty if this is set 'On' !!!!
; Instead you must use zlib.output_handler.
;output_handler =
; Transparent output compression using the zlib library
; Valid values for this option are 'off', 'on', or a specific buffer size
; to be used for compression (default is 4KB)
; Note: Resulting chunk size may vary due to nature of compression. PHP
; outputs chunks that are few hundreds bytes each as a result of
; compression. If you prefer a larger chunk size for better
; performance, enable output_buffering in addition.
; Note: You need to use zlib.output_handler instead of the standard
; output_handler, or otherwise the output will be corrupted.
zlib.output_compression = Off
; You cannot specify additional output handlers if zlib.output_compression
; is activated here. This setting does the same as output_handler but in
; a different order.
;zlib.output_handler =
; Implicit flush tells PHP to tell the output layer to flush itself
; automatically after every output block. This is equivalent to calling the
; PHP function flush() after each and every call to print() or echo() and each
; and every HTML block. Turning this option on has serious performance
; implications and is generally recommended for debugging purposes only.
implicit_flush = Off
; The unserialize callback function will be called (with the undefined class'
; name as parameter), if the unserializer finds an undefined class
; which should be instantiated.
; A warning appears if the specified function is not defined, or if the
; function doesn't include/implement the missing class.
; So only set this entry, if you really want to implement such a
; callback-function.
unserialize_callback_func=
; When floats doubles are serialized store serialize_precision significant
; digits after the floating point. The default value ensures that when floats
; are decoded with unserialize, the data will remain the same.
serialize_precision = 100
; Whether to enable the ability to force arguments to be passed by reference
; at function call time. This method is deprecated and is likely to be
; unsupported in future versions of PHP/Zend. The encouraged method of
; specifying which arguments should be passed by reference is in the function
; declaration. You're encouraged to try and turn this option Off and make
; sure your scripts work properly with it in order to ensure they will work
; with future versions of the language (you will receive a warning each time
; you use this feature, and the argument will be passed by value instead of by
; reference).
allow_call_time_pass_reference = On
;
; Safe Mode
;
safe_mode = Off
; By default, Safe Mode does a UID compare check when
; opening files. If you want to relax this to a GID compare,
; then turn on safe_mode_gid.
safe_mode_gid = Off
; When safe_mode is on, UID/GID checks are bypassed when
; including files from this directory and its subdirectories.
; (directory must also be in include_path or full path must
; be used when including)
safe_mode_include_dir =
; When safe_mode is on, only executables located in the safe_mode_exec_dir
; will be allowed to be executed via the exec family of functions.
safe_mode_exec_dir =
; Setting certain environment variables may be a potential security breach.
; This directive contains a comma-delimited list of prefixes. In Safe Mode,
; the user may only alter environment variables whose names begin with the
; prefixes supplied here. By default, users will only be able to set
; environment variables that begin with PHP_ (e.g. PHP_FOO=BAR).
;
; Note: If this directive is empty, PHP will let the user modify ANY
; environment variable!
safe_mode_allowed_env_vars = PHP_
; This directive contains a comma-delimited list of environment variables that
; the end user won't be able to change using putenv(). These variables will be
; protected even if safe_mode_allowed_env_vars is set to allow to change them.
safe_mode_protected_env_vars = LD_LIBRARY_PATH
; open_basedir, if set, limits all file operations to the defined directory
; and below. This directive makes most sense if used in a per-directory
; or per-virtualhost web server configuration file. This directive is
; *NOT* affected by whether Safe Mode is turned On or Off.
;open_basedir =
; This directive allows you to disable certain functions for security reasons.
; It receives a comma-delimited list of function names. This directive is
; *NOT* affected by whether Safe Mode is turned On or Off.
disable_functions =
; This directive allows you to disable certain classes for security reasons.
; It receives a comma-delimited list of class names. This directive is
; *NOT* affected by whether Safe Mode is turned On or Off.
disable_classes =
; Colors for Syntax Highlighting mode. Anything that's acceptable in
; span style="color: ???????" would work.
;highlight.string = #DD0000
;highlight.comment = #FF9900
;highlight.keyword = #007700
;highlight.bg = #FFFFFF
;highlight.default = #0000BB
;highlight.html = #000000
; If enabled, the request will be allowed to complete even if the user aborts
; the request. Consider enabling it if executing long request, which may end up
; being interrupted by the user or a browser timing out.
; ignore_user_abort = On
;
; Misc
;
; Decides whether PHP may expose the fact that it is installed on the server
; (e.g. by adding its signature to the Web server header). It is no security
; threat in any way, but it makes it possible to determine whether you use PHP
; on your server or not.
expose_php = On
;;;;;;;;;;;;;;;;;;;
; Resource Limits ;
;;;;;;;;;;;;;;;;;;;
max_execution_time = 3000 ; Maximum execution time of each script, in seconds
max_input_time = 60 ; Maximum amount of time each script may spend parsing request data
memory_limit = 8M ; Maximum amount of memory a script may consume (8MB)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Error handling and logging ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; error_reporting is a bit-field. Or each number up to get desired error
; reporting level
; E_ALL - All errors and warnings (doesn't include E_STRICT)
; E_ERROR - fatal run-time errors
; E_WARNING - run-time warnings (non-fatal errors)
; E_PARSE - compile-time parse errors
; E_NOTICE - run-time notices (these are warnings which often result
; from a bug in your code, but it's possible that it was
; intentional (e.g., using an uninitialized variable and
; relying on the fact it's automatically initialized to an
; empty string)
; E_STRICT - run-time notices, enable to have PHP suggest changes
; to your code which will ensure the best interoperability
; and forward compatibility of your code
; E_CORE_ERROR - fatal errors that occur during PHP's initial startup
; E_CORE_WARNING - warnings (non-fatal errors) that occur during PHP's
; initial startup
; E_COMPILE_ERROR - fatal compile-time errors
; E_COMPILE_WARNING - compile-time warnings (non-fatal errors)
; E_USER_ERROR - user-generated error message
; E_USER_WARNING - user-generated warning message
; E_USER_NOTICE - user-generated notice message
;
; Examples:
;
; - Show all errors, except for notices and coding standards warnings
;
;error_reporting = E_ALL ~E_NOTICE
;
; - Show all errors, except for notices
;
;error_reporting = E_ALL ~E_NOTICE | E_STRICT
;
; - Show only errors
;
;error_reporting = E_COMPILE_ERROR|E_ERROR|E_CORE_ERROR
;
; - Show all errors except for notices and coding standards warnings
;
error_reporting = E_ALL ~E_NOTICE
; Print out errors (as a part of the output). For production web sites,
; you're strongly encouraged to turn this feature off, and use error logging
; instead (see below). Keeping display_errors enabled on a production web site
; may reveal security information to end users, such as file paths on your Web
; server, your database schema or other information.
display_errors = On
; Even when display_errors is on, errors that occur during PHP's startup
; sequence are not displayed. It's strongly recommended to keep
; display_startup_errors off, except for when debugging.
display_startup_errors = Off
; Log errors into a log file (server-specific log, stderr, or error_log (below))
; As stated above, you're strongly advised to use error logging in place of
; error displaying on production web sites.
log_errors = Off
; Set maximum length of log_errors. In error_log information about the source is
; added. The default is 1024 and 0 allows to not apply any maximum length at all.
log_errors_max_len = 1024
; Do not log repeated messages. Repeated errors must occur in same file on same
; line until ignore_repeated_source is set true.
ignore_repeated_errors = Off
; Ignore source of message when ignoring repeated messages. When this setting
; is On you will not log errors with repeated messages from different files or
; sourcelines.
ignore_repeated_source = Off
; If this parameter is set to Off, then memory leaks will not be shown (on
; stdout or in the log). This has only effect in a debug compile, and if
; error reporting includes E_WARNING in the allowed list
report_memleaks = On
; Store the last error/warning message in $php_errormsg (boolean).
track_errors = Off
; Disable the inclusion of HTML tags in error messages.
; Note: Never use this feature for production boxes.
;html_errors = Off
; If html_errors is set On PHP produces clickable error messages that direct
; to a page describing the error or function causing the error in detail.
; You can download a copy of the PHP manual from
; and change docref_root to the base URL of your local copy including the
; leading '/'. You must also specify the file extension being used including
; the dot.
; Note: Never use this feature for production boxes.
;docref_root = "/phpmanual/"
;docref_ext = .html
; String to output before an error message.
;error_prepend_string = "font color=ff0000"
; String to output after an error message.
;error_append_string = "/font"
; Log errors to specified file.
;error_log = filename
; Log errors to syslog (Event Log on NT, not valid in Windows 95).
;error_log = syslog
;;;;;;;;;;;;;;;;;
; Data Handling ;
;;;;;;;;;;;;;;;;;
;
; Note - track_vars is ALWAYS enabled as of PHP 4.0.3
; The separator used in PHP generated URLs to separate arguments.
; Default is "".
;arg_separator.output = ""
; List of separator(s) used by PHP to parse input URLs into variables.
; Default is "".
; NOTE: Every character in this directive is considered as separator!
;arg_separator.input = ";"
; This directive describes the order in which PHP registers GET, POST, Cookie,
; Environment and Built-in variables (G, P, C, E S respectively, often
; referred to as EGPCS or GPC). Registration is done from left to right, newer
; values override older values.
variables_order = "EGPCS"
; Whether or not to register the EGPCS variables as global variables. You may
; want to turn this off if you don't want to clutter your scripts' global scope
; with user data. This makes most sense when coupled with track_vars - in which
; case you can access all of the GPC variables through the $HTTP_*_VARS[],
; variables.
;
; You should do your best to write your scripts so that they do not require
; register_globals to be on; Using form variables as globals can easily lead
; to possible security problems, if the code is not very well thought of.
register_globals = On
; Whether or not to register the old-style input arrays, HTTP_GET_VARS
; and friends. If you're not using them, it's recommended to turn them off,
; for performance reasons.
register_long_arrays = On
; This directive tells PHP whether to declare the argvargc variables (that
; would contain the GET information). If you don't use these variables, you
; should turn it off for increased performance.
register_argc_argv = On
; When enabled, the SERVER 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.
auto_globals_jit = On
; Maximum size of POST data that PHP will accept.
post_max_size = 8M
; Magic quotes
;
; Magic quotes for incoming GET/POST/Cookie data.
magic_quotes_gpc = On
; Magic quotes for runtime-generated data, e.g. data from SQL, from exec(), etc.
magic_quotes_runtime = Off
; Use Sybase-style magic quotes (escape ' with '' instead of \').
magic_quotes_sybase = Off
; Automatically add files before or after any PHP document.
auto_prepend_file =
auto_append_file =
; As of 4.0b4, PHP always outputs a character encoding by default in
; the Content-type: header. To disable sending of the charset, simply
; set it to be empty.
;
; PHP's built-in default is text/html
default_mimetype = "text/html"
;default_charset = "iso-8859-1"
; Always populate the $HTTP_RAW_POST_DATA variable.
;always_populate_raw_post_data = On
;;;;;;;;;;;;;;;;;;;;;;;;;
; Paths and Directories ;
;;;;;;;;;;;;;;;;;;;;;;;;;
; UNIX: "/path1:/path2"
;include_path = ".:/php/includes"
;
; Windows: "\path1;\path2"
include_path = ".;D:\apptools\php5\PEAR"
; 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
doc_root =
; The directory under which PHP opens the script using /~username used only
; if nonempty.
user_dir =
; Directory in which the loadable extensions (modules) reside.
extension_dir = "D:/apptools/php5/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.
enable_dl = On
php如何判断日期是否是周末（星期六和星期天）
需要准备的材料分别是：电脑、php编辑器、浏览器。
1、首先，打开php编辑器，新建php文件，例如：index.php。
2、在index.php中，再输入代码：echo '今日' . date('Y-m-d')?. (date('N') 5 ? '是' : '不是')?. '周末';。
3、浏览器运行index.php页面，此时会打印出今日是不是周末的判断结果。
php->是什么意思
一、=,-的意思：
-是对象执行方法或取得属性用的。
=是数组里键和值对应用的。
二、用法
1、= 的用法数组中用于数组的?key?和?value之间的关系例如：
$a?=?array('0'?=?'1','2'?=?'4',);echo?$a['0'];echo?$a['2'];
2、- 的用法类中用于引用类实例的方法和属性例如：
class?Test{function?add(){return?$this-var++;}var?$var?=?0;}$a?=?new?Test;
//实例化对象名称
echo?$a-add();echo?$a-var;
扩展资料
PHP中-代码如下：
?php
class Car {
public $speed = 0;
//增加speedUp方法，使speed加10
public function speedUp(){
$this-speed+=10;
}
}
$car = new Car();
$car-speedUp();
echo $car-speed;
?
PHP中=代码如下：
?php
//从数组变量$arr中，读取键为apple的值
$arr = array('apple'="苹果",'banana'="香蕉",'pineapple'="菠萝");
$arr0=$arr["apple"];
if( isset($arr0) )
{print_r($arr0);
}
?
参考资料来源：百度百科 - PHP （超文本预处理器）
百度百科 - PHP运算符