The **`get_defined_functions` method** can be used to get a list of user-defined functions and built-in functions. 

#     
#  Syntax

```
get_defined_functions(bool $exclude_disabled = true): array
```

We can use the `exclude_disabled` argument to include disabled functions from the returned functions. By default, the disabled functions are excluded. 

This method returns a multidimensional array with a user-defined function with key `user` and a built-in function with key `internal`.

##    
## Code

<?php 
  function test(){
    echo "hi";
  }

  $arr = get_defined_functions();

  echo "User defined in Functions\n";
  var_export($arr['user']);

  echo "\n\nBuild in Functions\n"; 
  var_export($arr['internal']);
?>

In the code above, we created a function with the name `test`. Then we called the `get_defined_functions` method to get the list of user-defined and built-in functions. 

What is the get_defined_functions method in PHP?

The get_defined_functions method in PHP returns arrays of user-defined and built-in functions, with options to include disabled functions.