PHP Gets the code example that currently executes the PHP file name

This article mainly introduces PHP to get the current execution of PHP file name code, the need for friends can refer to the following

Today write the wall when the navigation judge encountered this problem. My solution is this:

Judge the current PHP file name to determine which block of the navigation bar is highlighted.
How does php get the current URL file name?
That's what I'm dealing with: shock:

Tutorial

First of all, we must get the URL of the current page, where we use PHP to get the $_SERVER['PHP_SELF'] Web address
Suppose the URL is http://www.php.cn/

$php _self= $_server[' php_self ']; Get Web address//output result: http://www.php.cn/

The output found that we only need to index.php, the front of a large string of things are useless.
What do we do?
Here we use the substr () function.
substr() is used to return a part of a string:

SUBSTR syntax
SUBSTR (String,start,length)

Parameters	Description
String	Necessary. A string that specifies the part to return.
Start	Necessary. Specifies where to start the string. Positive number – starts at the specified position of the string Negative number – starts at the specified position starting at the end of the string 0– begins at the first character in a string
Length	Optional. Specifies the length of the string to be returned. The default is until the end of the string. Positive number – The length returned from the position where the start parameter is located Negative number – The length returned from the end of the string

See the second argument of this function, which specifies where the string begins. It is clear that the last/beginning of the URL is what we need.
Then we need to use the strrpos() function to get/last occurrence position.

Strrpos syntax

Strrpos (String,find,start)

Parameters	Description
String	Necessary. Specifies the string to be searched.
Find	Necessary. Specifies the character to find.
Start	Optional. Specify where to start the search.

So the total code is as follows:

$php _self = substr ($_server[' php_self '],strripos ($_server[' php_self '], "/") +1);//Why add 1? Because I want to rule out the previous one.

One of the more recommended functions

Gets the current script URL function getcururl () {  if (!empty ($_server["Request_uri"]))   {    $scriptName = $_server[" Request_uri "];    $nowurl = $scriptName;  } else   {    $scriptName = $_server["Php_self"];    if (Empty ($_server["query_string"]))     {      $nowurl = $scriptName;    } else     {      $nowurl = $scriptName. "?". $_server["Query_string"];    }  }  return $nowurl;}

This solves, in many cases, the need for some string intercept function help to get the results we want.

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