PHP set_include_path() Function

The set_include_path() function is an inbuilt function in PHP that sets the include_path configuration option.

Syntax:

string|false set_include_path(string $include_path)

Parameters: This function accepts one parameter that is described below:

• $include_path: This parameter specifies the new value for the include_path.

Return Value: This function returns the old include_path on successful, otherwise returns "false".

Example 1: In this example, we will use the set_include_path() function.

<?php
    $path = "/home/dachman" ;
    if(true == set_include_path($path)){
        echo "Path is set now" ;
    } else {
        echo "Path is not set now" ;
    }
?>

Output:

The path is set now

Example 2: In the below code, we will check the path before using the set_include_path() function.

<?php
   $path = "/home/dachman" ;

   // Before using set_include_path() function.
   echo get_include_path()."\n";
   
   set_include_path($path) ;

   echo get_include_path() ;
?>

Output:

.:/usr/share/php
/home/dachman 

Reference: https://www.php.net/manual/en/function.set-include-path.php