Get PHP function body as string

This piece of code can return the method body from a class

public static function getFunctionString($class, $function){  $func = new ReflectionMethod($class,$function);   $filename = $func->getFileName();   $start_line = $func->getStartLine();  $end_line = $func->getEndLine()-1;  $length = $end_line - $start_line;  $source = file($filename);  $body = implode("", array_slice($source, $start_line, $length));  return $body;}

When to use:

Extract the function details & execute in other another class when the function contains self::func();

Eg:

class A{   private static $var_a = 1;  public static function a(){     self::func();  }  public static function func(){     echo self::$var_a;  }}

In class B, we need to call function a from Class A

class B{   private static $var_a=2;  public static function b(){     eval(getFunctionString('A', 'a'));  }}B::b();//will output 2