Php outputs all variables, constants, modules, functions, and classes of the current process.

Php outputs all variables, constants, modules, functions, and classes of the current process.

Echo' '; $ B = array ); $ Arr = get_defined_vars (); // Print $ B Print_r ($ arr ["B"]); // Print all server variables Print_r ($ arr ["_ SERVER"]); // Print all available key values of the 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 indicates that it is null and no parameter is required. 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 Echo' '; print_r(get_loaded_extensions()); ?> 4. get_extension_funcs(PHP 4, PHP 5)-Get the available function array get_extension_funcs (string $ module_name) of the specified module. This function returns all available functions of the specified module. The input parameter (module name) must be in lowercase. Echo' '; print_r(get_extension_funcs("gd")); print_r(get_extension_funcs("xml")); ?> 5. get_defined_constants(PHP 4> = 4.1.0, PHP 5)-get the names of all constants associated with the array and their values. array get_defined_constants ([bool $ categorize = false]) Echo' '; define("MY_CONSTANT", 1); print_r(get_defined_constants(true)); ?> 6. get_declared_classes(PHP 4, PHP 5)-Get the array get_declared_classes (void) consisting of the names of the defined classes) Echo' '; //define classone class classone { } //define classtwo class classtwo { } //This will show X classes (built-ins, extensions etc) with //classone and classtwo as the last two 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()); ?>