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

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_classes (void)
Copy CodeThe code is as follows:

     Echo '
';
Define Classone
Class Classone {}
Define Classtwo
Class Classtwo {}
This'll show X classes (built-ins, 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 with class three and four appended
Print_r (Get_declared_classes ());
?>
http://www.bkjia.com/PHPjc/825077.html www.bkjia.com true http://www.bkjia.com/PHPjc/825077.html techarticle 1. Get_defined_vars (php 4 = 4.0.4, PHP 5)-Gets an array of all the defined variables arrays get_defined_vars (void) This function returns a list that contains all the defined variables ... 
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