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HomeBackend DevelopmentPHP TutorialSummary and sharing of the use of $_SERVER in PHP


'PHP_SELF':当前执行脚本的文件名,与 document root 有关。例如,在地址为 http://example.com/foo/bar.php 的脚本中使用 $_SERVER['PHP_SELF'] 将得到 /foo/bar.php
'SCRIPT_NAME':包含当前脚本的路径。这在页面需要指向自己时非常有用。

echo &#39;$_SERVER["PHP_SELF"] 输出:&#39;.$_SERVER[&#39;PHP_SELF&#39;];echo "<br/>";echo "<br/>";echo &#39;$_SERVER["SCRIPT_NAME"] 输出:&#39;.$_SERVER[&#39;SCRIPT_NAME&#39;];
  • 当链接参数不使用路径方式时$_SERVER['PHP_SELF']$_SERVER['SCRIPT_NAME'] 一样

Summary and sharing of the use of $_SERVER in PHP

  • 当链接参数使用路径方式时$_SERVER['PHP_SELF']$_SERVER['SCRIPT_NAME'] 不一样

Summary and sharing of the use of $_SERVER in PHP
'SCRIPT_FILENAME':当前执行脚本的绝对路径。包含__FILE__ 这个常量的文件的完整路径和文件名。

$_['SCRIPT_FILENAME']__FILE__ 在同一个脚本内的话,值一样,当在require 或 include 包含文件下时,值不一样

echo "\$_SERVER[&#39;SCRIPT_FILENAME&#39;]的输出:".$_SERVER[&#39;SCRIPT_FILENAME&#39;];echo "<br/>";echo "<br/>";echo "__FILE__的输出:".__FILE__;

Summary and sharing of the use of $_SERVER in PHP

IP地址获取:

'SERVER_ADDR':当前运行脚本所在的服务器的 IP 地址。
'REMOTE_ADDR':浏览当前页面的用户的 IP 地址。
Summary and sharing of the use of $_SERVER in PHP

服务器其他信息获取:

'SERVER_NAME':当前运行脚本所在的服务器的主机名。如果脚本运行于虚拟主机中,该名称是由那个虚拟主机所设置的值决定。

Note: 在 Apache 2 里,必须设置 UseCanonicalName = On 和 ServerName。 否则该值会由客户端提供,就有可能被伪造。 上下文有安全性要求的环境里,不应该依赖此值。

'SERVER_PORT':Web 服务器使用的端口。默认值为 “80”。如果使用 SSL 安全连接,则这个值为用户设置的 HTTP 端口。
'DOCUMENT_ROOT':当前运行脚本所在的文档根目录。在服务器配置文件中定义:例如:C:/Users/Administrator/Desktop/test
Summary and sharing of the use of $_SERVER in PHP

请求信息获取

'SERVER_PROTOCOL':请求页面时通信协议的名称和版本。例如,HTTP/1.0
'REQUEST_METHOD':访问页面使用的请求方法;例如,“GET”, “HEAD”,“POST”,“PUT”

Note:如果请求方法为 HEAD,PHP 脚本将在发送 Header 头信息之后终止(这意味着在产生任何输出后,不再有输出缓冲)。

'HTTP_HOST':当前请求头中 Host: 项的内容,如果存在的话。
'HTTP_REFERER':引导用户代理到当前页的前一页的地址(如果存在)。由 user agent 设置决定。并不是所有的用户代理都会设置该项,有的还提供了修改 HTTP_REFERER 的功能。简言之,该值并不可信。
'HTTP_USER_AGENT':当前请求头中 User-Agent: 项的内容,如果存在的话。该字符串表明了访问该页面的用户代理的信息。一个典型的例子是:Mozilla/4.5 [en] (X11; U; Linux 2.2.9 i586)。除此之外,你可以通过 get_browser() 来使用该值,从而定制页面输出以便适应用户代理的性能。
'REQUEST_URI':URI 用来指定要访问的页面。例如 “/index.html”。
Summary and sharing of the use of $_SERVER in PHP

路径信息的获取:

'PHP_SELF':当前执行脚本的文件名,与 document root 有关。例如,在地址为 http://example.com/foo/bar.php 的脚本中使用 $_SERVER['PHP_SELF'] 将得到 /foo/bar.php
'SCRIPT_NAME':包含当前脚本的路径。这在页面需要指向自己时非常有用。

echo &#39;$_SERVER["PHP_SELF"] 输出:&#39;.$_SERVER[&#39;PHP_SELF&#39;];echo "<br/>";echo "<br/>";echo &#39;$_SERVER["SCRIPT_NAME"] 输出:&#39;.$_SERVER[&#39;SCRIPT_NAME&#39;];
  • 当链接参数不使用路径方式时$_SERVER['PHP_SELF']$_SERVER['SCRIPT_NAME'] 一样

Summary and sharing of the use of $_SERVER in PHP

  • 当链接参数使用路径方式时$_SERVER['PHP_SELF']$_SERVER['SCRIPT_NAME'] 不一样

Summary and sharing of the use of $_SERVER in PHP
'SCRIPT_FILENAME':当前执行脚本的绝对路径。包含__FILE__ 这个常量的文件的完整路径和文件名。

$_['SCRIPT_FILENAME']__FILE__ 在同一个脚本内的话,值一样,当在require 或 include 包含文件下时,值不一样

echo "\$_SERVER[&#39;SCRIPT_FILENAME&#39;]的输出:".$_SERVER[&#39;SCRIPT_FILENAME&#39;];echo "<br/>";echo "<br/>";echo "__FILE__的输出:".__FILE__;

Summary and sharing of the use of $_SERVER in PHP

IP地址获取:

'SERVER_ADDR':当前运行脚本所在的服务器的 IP 地址。
'REMOTE_ADDR':浏览当前页面的用户的 IP 地址。
Summary and sharing of the use of $_SERVER in PHP

服务器其他信息获取:

'SERVER_NAME':当前运行脚本所在的服务器的主机名。如果脚本运行于虚拟主机中,该名称是由那个虚拟主机所设置的值决定。

Note: 在 Apache 2 里,必须设置 UseCanonicalName = On 和 ServerName。 否则该值会由客户端提供,就有可能被伪造。 上下文有安全性要求的环境里,不应该依赖此值。

'SERVER_PORT':Web 服务器使用的端口。默认值为 “80”。如果使用 SSL 安全连接,则这个值为用户设置的 HTTP 端口。
'DOCUMENT_ROOT':当前运行脚本所在的文档根目录。在服务器配置文件中定义:例如:C:/Users/Administrator/Desktop/test
Summary and sharing of the use of $_SERVER in PHP

请求信息获取

'SERVER_PROTOCOL':请求页面时通信协议的名称和版本。例如,HTTP/1.0
'REQUEST_METHOD':访问页面使用的请求方法;例如,“GET”, “HEAD”,“POST”,“PUT”

Note:如果请求方法为 HEAD,PHP 脚本将在发送 Header 头信息之后终止(这意味着在产生任何输出后,不再有输出缓冲)。

'HTTP_HOST':当前请求头中 Host: 项的内容,如果存在的话。
'HTTP_REFERER':引导用户代理到当前页的前一页的地址(如果存在)。由 user agent 设置决定。并不是所有的用户代理都会设置该项,有的还提供了修改 HTTP_REFERER 的功能。简言之,该值并不可信。
'HTTP_USER_AGENT':当前请求头中 User-Agent: 项的内容,如果存在的话。该字符串表明了访问该页面的用户代理的信息。一个典型的例子是:Mozilla/4.5 [en] (X11; U; Linux 2.2.9 i586)。除此之外,你可以通过 get_browser() 来使用该值,从而定制页面输出以便适应用户代理的性能。
'REQUEST_URI':URI 用来指定要访问的页面。例如 “/index.html”。
Summary and sharing of the use of $_SERVER in PHP

相关推荐:

细说PHP中的$_SERVER

php之$_SERVER函数解析

PHP服务器变量$_SERVER详解

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