original_string: public function filterEnv($variableName) {
          if(!is_string($variableName)) {
              throw new \Exception('Variable name expected as string');
          }
          
          if(!$this->filterHas(\INPUT_ENV, $variableName)) {
              return null;
          }
          
          // Sadly INPUT_ENV is broken and does not work
          // getenv() has to be used
          return $this->filter(getenv($variableName));
      }
code: public function filterEnv($variableName) {
          if(!is_string($variableName)) {
              throw new \Exception('Variable name expected as string');
          }
          
          if(!$this->filterHas(\INPUT_ENV, $variableName)) {
              return null;
          }
          
          // Sadly INPUT_ENV is broken and does not work
          // getenv() has to be used
          return $this->filter(getenv($variableName));
      }
code_tokens: public function filterEnv ( $ variableName ) { if ( ! is_string ( $ variableName ) ) { throw new \ Exception ( 'Variable name expected as string' ) ; } if ( ! $ this -> filterHas ( \ INPUT_ENV , $ variableName ) ) { return null ; } // Sadly INPUT_ENV is broken and does not work // getenv() has to be used return $ this -> filter ( getenv ( $ variableName ) ) ; }
docstring: Sanitizes a ENV-variable
  
  Returns null, if the variable does not exist
  
  @param string $variableName
  @return mixed
docstring_tokens: Sanitizes a ENV - variable