PHP output Current Process all variables/constants/modules/functions/Classes Example _php instance

1. Get_defined_vars(PHP 4 >= 4.0.4, PHP 5)-Gets an array of all defined variables
Array get_defined_vars (void)
This function returns a multidimensional array that contains a list of all defined variables, including environment variables, server variables, and user-defined variables.
Copy CodeThe code is as follows:
Echo '

';
$b = Array (1,1,2,3,5,8);
$arr = Get_defined_vars ();
Print $b
Print_r ($arr ["B"]);
Print all server variables
Print_r ($arr ["_server"]);
Print all available key values for a variable array
Print_r (Array_keys (Get_defined_vars ()));
?>
2. Get_defined_functions(PHP 4 >= 4.0.4, PHP 5)-Get all defined functions
Array get_defined_functions (void)//void is empty and does not require any arguments

 Echo '
';
function foo ()
{
echo "This is my function foo";
}
$arr = Get_defined_functions ();
Print_r ($arr);
?>

3. Get_loaded_extensions(PHP 4, PHP 5)-Get all available modules
Copy CodeThe code is as follows:

  Echo '
';
Print_r (Get_loaded_extensions ());
?>

4. Get_extension_funcs(PHP 4, PHP 5)-Gets the available functions for the specified module
Array Get_extension_funcs (string $module _name) This function returns all available functions for the specified module. The parameter passed in (module name) must be lowercase
Copy CodeThe code is as follows:

   Echo '
';
Print_r (Get_extension_funcs ("GD"));
Print_r (Get_extension_funcs ("xml"));
?>

5. Get_defined_constants(PHP 4 >= 4.1.0, PHP 5)-Gets the name of the associative array all constants and their value
Array get_defined_constants ([bool $categorize = false])
Copy CodeThe code is as follows:

    Echo '
 Define ("My_constant", 1); 
 Print_r (Get_defined_constants (true)); 
? 
 
  6. Get_declared_classes  (PHP 4, PHP 5)-Gets an array of the names of the defined classes 
 array Get_declared_cla SSEs (void) 
   Copy Code   code is as follows: 
!--? php 
      
        Echo ' 
       
 Define Classone 
 class Classone {} 
//define Classtwo 
 class Classtwo {} 
//this would show X classes (built-in s, extensions etc) with 
//classone and Classtwo as the last of the Elements 
 Print_r (get_declared_classes ()); 
 Define Classthree 
 class Classthree {} 
//...and four 
 class Classfour {} 
//shows the same result as before W ITH class three and four appended 
 Print_r (get_declared_classes ()); 
? 
 
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