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Summary of PHP application path variable problems_PHP tutorial
Summary of PHP application path variable problems_PHP tutorial
Local server, domain name http://d.com, root path D:phpnowvhostsd.com.yii, the relative root directory has the file /x.php in the code requeir_once /a/a.php, and /a /a.phprequeir_once /a/b/b.php
/x.php
$_SERVER["HTTP_HOST"]: [d.com]//Host currently requested: domain name information
$_SERVER["PHP_SELF"]: [】//
$_SERVER["SCRIPT_NAME"]:【/x.php】 //
$_SERVER["SCRIPT_FILENAME"]: [D:/phpnow/vhosts/d.com.yii/x.php 】// of the actual execution file.
__FILE__: []// of the actual execution code.
$_SERVER["REQUEST_URI"]: [/x.php/x/y/z.html?a=b&c=d]//The url request includes all content after / and after.
$_SERVER["QUERY_STRING"]: [a=b&c=d] //The content after ? in the url request.
$_SERVER["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com.yii]//Document root directory. Define
basename($_SERVER["PHP_SELF"]) in the server configuration file: []// to execute the file 🎜>basename($_SERVER["SCRIPT_NAME"]): [x.php] //basename($_SERVER["SCRIPT_FILENAME" ]): [x.php]//’s basename(__FILE__): []//'s
dirname($_SERVER["PHP_SELF"]): []//'s dirname($_SERVER["SCRIPT_NAME"]): []//'s dirname($_SERVER["SCRIPT_FILENAME"]): [D:/phpnow/vhosts/d.com.yii]// is located dirname(__FILE__) : []//'s
require_once /a/a.php
$_SERVER["HTTP_HOST"]: [d.com]//Host currently requested: domain name information
$_SERVER["HTTP_HOST"]: [d.com]//Host currently requested: domain name information
/a/a.php $_SERVER["HTTP_HOST"]: [d.com]//Host currently requested: domain name information $_SERVER["HTTP_HOST"]: [d.com]//Host currently requested: domain name information
/x.php /a/a.php /a/b/php
$_SERVER["PHP_SELF"]: [】//$_SERVER["SCRIPT_NAME"]:【/x.php】 //$_SERVER["SCRIPT_FILENAME"]: [D:/phpnow/vhosts/d.com.yii/x.php 】// of the actual execution file. __FILE__: []// of the actual execution code.
$_SERVER["REQUEST_URI"]: [/x.php/x/y/z.html?a=b&c=d]//The url request includes all content after / and after.
$_SERVER["QUERY_STRING"]: [a=b&c=d] //The content after ? in the url request.
$_SERVER["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com.yii]//Document root directory. Define
basename($_SERVER["PHP_SELF"]) in the server configuration file: []// to execute the file 🎜>basename($_SERVER["SCRIPT_NAME"]): [x.php] //
basename($_SERVER["SCRIPT_FILENAME" ]): [x.php]//’s basename(__FILE__): []//'s dirname($_SERVER["PHP_SELF"]): []//'s dirname($_SERVER["SCRIPT_NAME"]): []//'s dirname($_SERVER["SCRIPT_FILENAME"]): [D:/phpnow/vhosts/d.com.yii]// is located
dirname(__FILE__) :[]//'s require_once /a/b/b.php
$_SERVER["PHP_SELF"]: []//
$_SERVER["SCRIPT_NAME"]：【/x.php】//
$_SERVER["SCRIPT_FILENAME"]：[D:/ phpnow/vhosts/d.com.yii/x.php】//.
__FILE__: []//.
$_SERVER["REQUEST_URI"]: [/x.php/x/y/z.html?a=b&c=d]//The url request includes all content after / and after.
$_SERVER["QUERY_STRING"]: [a=b&c=d] //The content after ? in the url request.
$_SERVER["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com.yii]//Document root directory. Define
basename($_SERVER["PHP_SELF"]) in the server configuration file: []//'s
basename($_SERVER["SCRIPT_NAME"]) :[x.php]//'s
basename($_SERVER["SCRIPT_FILENAME"]): [x.php]//'s
basename(__FILE__) :【】//'s
dirname($_SERVER["PHP_SELF"]): [】//'s
dirname ($_SERVER["SCRIPT_NAME"])：【】//'s
dirname($_SERVER["SCRIPT_FILENAME"])：【D:/phpnow/vhosts/d.com.yii】/ /'s
dirname(__FILE__): []//'s
$_SERVER["PHP_SELF"]: []//
$_SERVER["SCRIPT_NAME"]：【/a/a.php】//
$_SERVER["SCRIPT_FILENAME"]：[D :/phpnow/vhosts/d.com.yii/a/a.php】//.
__FILE__: []//.
$_SERVER["REQUEST_URI"]: [/a/a.php/x/y/z.html?a=b&c=d]//The url request includes / and everything after it.
$_SERVER["QUERY_STRING"]: [a=b&c=d] //The content after ? in the url request.
$_SERVER["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com.yii]//Document root directory. Define
basename($_SERVER["PHP_SELF"]) in the server configuration file: []//'s
basename($_SERVER["SCRIPT_NAME"]) :[a.php]//’s
basename($_SERVER["SCRIPT_FILENAME"]): [a.php]//’s
basename(__FILE__) :【】//'s
dirname($_SERVER["PHP_SELF"]): [】//'s
dirname ($_SERVER["SCRIPT_NAME"]):[/a]//'s
dirname($_SERVER["SCRIPT_FILENAME"]):[D:/phpnow/vhosts/d.com.yii /a】//’s
dirname(__FILE__):【】//’s
require_once /a/b/b.php
$_SERVER["PHP_SELF"]: []//
$_SERVER["SCRIPT_NAME"]：【/a/a.php】//
$_SERVER["SCRIPT_FILENAME"]：[D :/phpnow/vhosts/d.com.yii/a/a.php】//.
__FILE__: []//.
$_SERVER["REQUEST_URI"]: [/a/a.php/x/y/z.html?a=b&c=d]//The url request includes / and everything after it.
$_SERVER["QUERY_STRING"]: [a=b&c=d] //The content after ? in the url request.
$_SERVER["DOCUMENT_ROOT"]: [D:/phpnow/vhosts/d.com.yii]//Document root directory. Define
basename($_SERVER["PHP_SELF"]) in the server configuration file: []//'s
basename($_SERVER["SCRIPT_NAME"]) :[a.php]//’s
basename($_SERVER["SCRIPT_FILENAME"]): [a.php]//’s
basename(__FILE__) :【】//'s
dirname($_SERVER["PHP_SELF"]): [】//'s
dirname ($_SERVER["SCRIPT_NAME"]):[/a]//'s
dirname($_SERVER["SCRIPT_FILENAME"]):[D:/phpnow/vhosts/d.com.yii /a】//’s
dirname(__FILE__):【】//’s<?<span php
</span><span echo</span> "<br/>/x.php<hr/>"<span ;
</span><span echo</span> '$_SERVER["HTTP_HOST"]：【',<span $_SERVER</span>['HTTP_HOST'],"】//当前请求的 Host:即域名信信息","<br/>"<span ;
</span><span echo</span> '<br/>'<span ;
</span><span echo</span> '$_SERVER["PHP_SELF"]：【<font color="#EE00EE">',<span $_SERVER</span>['PHP_SELF'],"</font>】//<font color='green'>请求执行文件的</font><font color='red'>相对</font><font color='blue'>地址</font>","<br/>"<span ;
</span><span echo</span> '$_SERVER["SCRIPT_NAME"]：【',<span $_SERVER</span>['SCRIPT_NAME'],"】//<font color='green'>实际执行文件</font><font color='red'>相对</font><font color='blue'>地址</font>","<br/>"<span ;
</span><span echo</span> '$_SERVER["SCRIPT_FILENAME"]：【',<span $_SERVER</span>['SCRIPT_FILENAME'],"】//<font color='green'>实际执行文件的</font><font color='red'>绝对</font><font color='blue'>路径</font>。","<br/>"<span ;
</span><span echo</span> '__FILE__ ：【<font color="#EE00EE">',<span __FILE__</span> ,"</font>】//<font color='green'>实际执行代码的</font><font color='red'>绝对</font><font color='blue'>路径</font>。","<br/>"<span ;
</span><span echo</span> '<br/>'<span ;
</span><span echo</span> '$_SERVER["REQUEST_URI"]：【',<span $_SERVER</span>['REQUEST_URI'],"】//url请求中包括/和之后的所有内容。","<br/>"<span ;
</span><span echo</span> '$_SERVER["QUERY_STRING"]：【',<span $_SERVER</span>['QUERY_STRING'],"】//url请求中?之后的内容。","<br/>"<span ;
</span><span echo</span> '<br/>'<span ;
</span><span echo</span> '$_SERVER["DOCUMENT_ROOT"]：【',<span $_SERVER</span>['DOCUMENT_ROOT'],"】//文档根目录。在服务器配置文件中定义","<br/>"<span ;
</span><span echo</span> "<br/>"<span ;
</span><span echo</span> 'basename($_SERVER["PHP_SELF"])：【<font color="#EE00EE">',<span basename</span>(<span $_SERVER</span>['PHP_SELF']),"</font>】//<font color='green'>请求执行文件的</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span echo</span> 'basename($_SERVER["SCRIPT_NAME"])：【',<span basename</span>(<span $_SERVER</span>['SCRIPT_NAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span echo</span> 'basename($_SERVER["SCRIPT_FILENAME"])：【',<span basename</span>(<span $_SERVER</span>['SCRIPT_FILENAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span echo</span> 'basename(__FILE__)：【<font color="#EE00EE">',<span basename</span>(<span __FILE__</span>),"</font>】//<font color='green'>实际执行代码</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span //</span><span echo 'basename($_SERVER["ORIG_SCRIPT_NAME"])：【',basename($_SERVER['ORIG_SCRIPT_NAME']),"】//如果PHP通过CGI来运行，这个变量的值就是/Php/Php.exe 如果Apache将PHP脚本作为模块来运行，该变量的值应该是/Phptest.php","<br/>";</span>
<span echo</span> "<br/>"<span ;
</span><span echo</span> 'dirname($_SERVER["PHP_SELF"])：【<font color="#EE00EE">',<span dirname</span>(<span $_SERVER</span>['PHP_SELF']),"</font>】//<font color='green'>请求执行文件的</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span echo</span> 'dirname($_SERVER["SCRIPT_NAME"])：【',<span dirname</span>(<span $_SERVER</span>['SCRIPT_NAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span echo</span> 'dirname($_SERVER["SCRIPT_FILENAME"])：【',<span dirname</span>(<span $_SERVER</span>['SCRIPT_FILENAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span echo</span> 'dirname(__FILE__)：【<font color="#EE00EE">',<span dirname</span>(<span __FILE__</span>),"</font>】//<font color='green'>实际执行代码</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span //</span><span echo 'dirname($_SERVER["ORIG_SCRIPT_NAME"])：【',dirname($_SERVER['ORIG_SCRIPT_NAME']),"】//如果PHP通过CGI来运行，这个变量的值就是/Php/Php.exe 如果Apache将PHP脚本作为模块来运行，该变量的值应该是/Phptest.php","<br/>";</span>
<span echo</span> "<br/>"<span ;
</span><span echo</span> "require_once "<span ;
</span><span require_once</span>("a/a.php");<?<span php
</span><span echo</span> "/a/a.php<hr/>"<span ;
</span><span echo</span> '$_SERVER["HTTP_HOST"]：【',<span $_SERVER</span>['HTTP_HOST'],"】//当前请求的 Host:即域名信信息","<br/>"<span ;
</span><span echo</span> '<br/>'<span ;
</span><span echo</span> '$_SERVER["PHP_SELF"]：【<font color="#EE00EE">',<span $_SERVER</span>['PHP_SELF'],"</font>】//<font color='green'>请求执行文件的</font><font color='red'>相对</font><font color='blue'>地址</font>","<br/>"<span ;
</span><span echo</span> '$_SERVER["SCRIPT_NAME"]：【',<span $_SERVER</span>['SCRIPT_NAME'],"】//<font color='green'>实际执行文件</font><font color='red'>相对</font><font color='blue'>地址</font>","<br/>"<span ;
</span><span echo</span> '$_SERVER["SCRIPT_FILENAME"]：【',<span $_SERVER</span>['SCRIPT_FILENAME'],"】//<font color='green'>实际执行文件的</font><font color='red'>绝对</font><font color='blue'>路径</font>。","<br/>"<span ;
</span><span echo</span> '__FILE__ ：【<font color="#EE00EE">',<span __FILE__</span> ,"</font>】//<font color='green'>实际执行代码的</font><font color='red'>绝对</font><font color='blue'>路径</font>。","<br/>"<span ;
</span><span echo</span> '<br/>'<span ;
</span><span echo</span> '$_SERVER["REQUEST_URI"]：【',<span $_SERVER</span>['REQUEST_URI'],"】//url请求中包括/和之后的所有内容。","<br/>"<span ;
</span><span echo</span> '$_SERVER["QUERY_STRING"]：【',<span $_SERVER</span>['QUERY_STRING'],"】//url请求中?之后的内容。","<br/>"<span ;
</span><span echo</span> '<br/>'<span ;
</span><span echo</span> '$_SERVER["DOCUMENT_ROOT"]：【',<span $_SERVER</span>['DOCUMENT_ROOT'],"】//文档根目录。在服务器配置文件中定义","<br/>"<span ;
</span><span echo</span> "<br/>"<span ;
</span><span echo</span> 'basename($_SERVER["PHP_SELF"])：【<font color="#EE00EE">',<span basename</span>(<span $_SERVER</span>['PHP_SELF']),"</font>】//<font color='green'>请求执行文件的</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span echo</span> 'basename($_SERVER["SCRIPT_NAME"])：【',<span basename</span>(<span $_SERVER</span>['SCRIPT_NAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span echo</span> 'basename($_SERVER["SCRIPT_FILENAME"])：【',<span basename</span>(<span $_SERVER</span>['SCRIPT_FILENAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span echo</span> 'basename(__FILE__)：【<font color="#EE00EE">',<span basename</span>(<span __FILE__</span>),"</font>】//<font color='green'>实际执行代码</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span //</span><span echo 'basename($_SERVER["ORIG_SCRIPT_NAME"])：【',basename($_SERVER['ORIG_SCRIPT_NAME']),"】//如果PHP通过CGI来运行，这个变量的值就是/Php/Php.exe 如果Apache将PHP脚本作为模块来运行，该变量的值应该是/Phptest.php","<br/>";</span>
<span echo</span> "<br/>"<span ;
</span><span echo</span> 'dirname($_SERVER["PHP_SELF"])：【<font color="#EE00EE">',<span dirname</span>(<span $_SERVER</span>['PHP_SELF']),"</font>】//<font color='green'>请求执行文件的</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span echo</span> 'dirname($_SERVER["SCRIPT_NAME"])：【',<span dirname</span>(<span $_SERVER</span>['SCRIPT_NAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span echo</span> 'dirname($_SERVER["SCRIPT_FILENAME"])：【',<span dirname</span>(<span $_SERVER</span>['SCRIPT_FILENAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span echo</span> 'dirname(__FILE__)：【<font color="#EE00EE">',<span dirname</span>(<span __FILE__</span>),"</font>】//<font color='green'>实际执行代码</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span //</span><span echo 'dirname($_SERVER["ORIG_SCRIPT_NAME"])：【',dirname($_SERVER['ORIG_SCRIPT_NAME']),"】//如果PHP通过CGI来运行，这个变量的值就是/Php/Php.exe 如果Apache将PHP脚本作为模块来运行，该变量的值应该是/Phptest.php","<br/>";</span>
<span echo</span> "<br/>"<span ;
</span><span echo</span> "require_once "<span ;
</span><span require_once</span>("b/b.php");<?<span php
</span><span echo</span> "/a/b/b.php<hr/>"<span ;
</span><span echo</span> '$_SERVER["HTTP_HOST"]：【',<span $_SERVER</span>['HTTP_HOST'],"】//当前请求的 Host:即域名信信息","<br/>"<span ;
</span><span echo</span> '<br/>'<span ;
</span><span echo</span> '$_SERVER["PHP_SELF"]：【<font color="#EE00EE">',<span $_SERVER</span>['PHP_SELF'],"</font>】//<font color='green'>请求执行文件的</font><font color='red'>相对</font><font color='blue'>地址</font>","<br/>"<span ;
</span><span echo</span> '$_SERVER["SCRIPT_NAME"]：【',<span $_SERVER</span>['SCRIPT_NAME'],"】//<font color='green'>实际执行文件</font><font color='red'>相对</font><font color='blue'>地址</font>","<br/>"<span ;
</span><span echo</span> '$_SERVER["SCRIPT_FILENAME"]：【',<span $_SERVER</span>['SCRIPT_FILENAME'],"】//<font color='green'>实际执行文件的</font><font color='red'>绝对</font><font color='blue'>路径</font>。","<br/>"<span ;
</span><span echo</span> '__FILE__ ：【<font color="#EE00EE">',<span __FILE__</span> ,"</font>】//<font color='green'>实际执行代码的</font><font color='red'>绝对</font><font color='blue'>路径</font>。","<br/>"<span ;
</span><span echo</span> '<br/>'<span ;
</span><span echo</span> '$_SERVER["REQUEST_URI"]：【',<span $_SERVER</span>['REQUEST_URI'],"】//url请求中包括/和之后的所有内容。","<br/>"<span ;
</span><span echo</span> '$_SERVER["QUERY_STRING"]：【',<span $_SERVER</span>['QUERY_STRING'],"】//url请求中?之后的内容。","<br/>"<span ;
</span><span echo</span> '<br/>'<span ;
</span><span echo</span> '$_SERVER["DOCUMENT_ROOT"]：【',<span $_SERVER</span>['DOCUMENT_ROOT'],"】//文档根目录。在服务器配置文件中定义","<br/>"<span ;
</span><span echo</span> "<br/>"<span ;
</span><span echo</span> 'basename($_SERVER["PHP_SELF"])：【<font color="#EE00EE">',<span basename</span>(<span $_SERVER</span>['PHP_SELF']),"</font>】//<font color='green'>请求执行文件的</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span echo</span> 'basename($_SERVER["SCRIPT_NAME"])：【',<span basename</span>(<span $_SERVER</span>['SCRIPT_NAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span echo</span> 'basename($_SERVER["SCRIPT_FILENAME"])：【',<span basename</span>(<span $_SERVER</span>['SCRIPT_FILENAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span echo</span> 'basename(__FILE__)：【<font color="#EE00EE">',<span basename</span>(<span __FILE__</span>),"</font>】//<font color='green'>实际执行代码</font>的<font color='blue'>文件名</font>","<br/>"<span ;
</span><span //</span><span echo 'basename($_SERVER["ORIG_SCRIPT_NAME"])：【',basename($_SERVER['ORIG_SCRIPT_NAME']),"】//如果PHP通过CGI来运行，这个变量的值就是/Php/Php.exe 如果Apache将PHP脚本作为模块来运行，该变量的值应该是/Phptest.php","<br/>";</span>
<span echo</span> "<br/>"<span ;
</span><span echo</span> 'dirname($_SERVER["PHP_SELF"])：【<font color="#EE00EE">',<span dirname</span>(<span $_SERVER</span>['PHP_SELF']),"</font>】//<font color='green'>请求执行文件的</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span echo</span> 'dirname($_SERVER["SCRIPT_NAME"])：【',<span dirname</span>(<span $_SERVER</span>['SCRIPT_NAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span echo</span> 'dirname($_SERVER["SCRIPT_FILENAME"])：【',<span dirname</span>(<span $_SERVER</span>['SCRIPT_FILENAME']),"】//<font color='green'>实际执行文件</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span echo</span> 'dirname(__FILE__)：【<font color="#EE00EE">',<span dirname</span>(<span __FILE__</span>),"</font>】//<font color='green'>实际执行代码</font>的<font color='blue'>所在目录</font>","<br/>"<span ;
</span><span //</span><span echo 'dirname($_SERVER["ORIG_SCRIPT_NAME"])：【',dirname($_SERVER['ORIG_SCRIPT_NAME']),"】//如果PHP通过CGI来运行，这个变量的值就是/Php/Php.exe 如果Apache将PHP脚本作为模块来运行，该变量的值应该是/Phptest.php","<br/>";</span>
<span echo</span> "<br/>";
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PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
The Enduring Relevance of PHP: Is It Still Alive?
Apr 14, 2025 am 12:12 AM
PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
