print_r(get_defined_vars()); |
get_defined_vars — Returns an array of all defined variables
print_r(get_defined_functions()); |
get_defined_functions — Returns an array of all defined functions
You should be careful about the location in the code, because if you are inside a function it will work only for this function.
print_r(get_defined_constants()); |
get_defined_constants – Returns list all defined constants with their respective values
print_r(get_declared_classes()); |
get_declared_classes – Returns list all declared classes
print_r(memory_get_usage()); |
memory_get_usage — Returns the amount of memory allocated to PHP