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HomeBackend DevelopmentPHP TutorialSummary of PHP application path variable problems_PHP tutorial
Summary of PHP application path variable problems_PHP tutorial
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Jul 20, 2016 am 11:15 AM
dhttpphpphpnowvariabledomain nameapplicationSummarizeserverlocalrootpathquestion

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


$_SERVER["PHP_SELF"]: [】//$_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["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】//.
__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

/a/a.php

$_SERVER["HTTP_HOST"]: [d.com]//Host currently requested: domain name information

$_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["HTTP_HOST"]: [d.com]//Host currently requested: domain name information

$_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

/x.php

<?<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");

/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");

/a/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/>";

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/440233.htmlTechArticleLocal server, domain name http://d.com, root path D:phpnowvhostsd.com.yii, relative root The directory has the code requeir_once /a/a.php in the file /x.php, and /a/a.php requeir_once/a/b/b.php...
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php字符串有下标。在PHP中，下标不仅可以应用于数组和对象，还可应用于字符串，利用字符串的下标和中括号“[]”可以访问指定索引位置的字符，并对该字符进行读写，语法“字符串名[下标值]”；字符串的下标值（索引值）只能是整数类型，起始值为0。

php怎么替换nbsp空格符php怎么替换nbsp空格符Apr 24, 2022 pm 02:55 PM

方法：1、用“str_replace("&nbsp;","其他字符",$str)”语句，可将nbsp符替换为其他字符；2、用“preg_replace("/(\s|\&nbsp\;||\xc2\xa0)/","其他字符",$str)”语句。

php怎么判断有没有小数点php怎么判断有没有小数点Apr 20, 2022 pm 08:12 PM

php判断有没有小数点的方法：1、使用“strpos(数字字符串,'.')”语法，如果返回小数点在字符串中第一次出现的位置，则有小数点；2、使用“strrpos(数字字符串,'.')”语句，如果返回小数点在字符串中最后一次出现的位置，则有。

php怎么读取字符串后几个字符php怎么读取字符串后几个字符Apr 22, 2022 pm 08:31 PM

在php中，可以使用substr()函数来读取字符串后几个字符，只需要将该函数的第二个参数设置为负值，第三个参数省略即可；语法为“substr(字符串,-n)”，表示读取从字符串结尾处向前数第n个字符开始，直到字符串结尾的全部字符。

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