original_string: public static function check_filename(): bool
    {
  
      $args = \func_get_args();
      // Each argument must be a string starting with a letter, and having than one character made of letters, numbers and underscores
      foreach ( $args as $a ){
        if ( !\is_string($a) || (strpos($a, '/') !== false) || (strpos($a, '\\') !== false) ){
          return false;
        }
      }
      return true;
    }
code: public static function check_filename(): bool
    {
  
      $args = \func_get_args();
      // Each argument must be a string starting with a letter, and having than one character made of letters, numbers and underscores
      foreach ( $args as $a ){
        if ( !\is_string($a) || (strpos($a, '/') !== false) || (strpos($a, '\\') !== false) ){
          return false;
        }
      }
      return true;
    }
code_tokens: public static function check_filename ( ) : bool { $ args = \ func_get_args ( ) ; // Each argument must be a string starting with a letter, and having than one character made of letters, numbers and underscores foreach ( $ args as $ a ) { if ( ! \ is_string ( $ a ) || ( strpos ( $ a , '/' ) !== false ) || ( strpos ( $ a , '\\' ) !== false ) ) { return false ; } } return true ; }
docstring: Checks if a string doesn't contain a filesystem path.
  
  ```php
  \bbn\x::dump(\bbn\str::check_filename("Paul"));
  // (bool) true
  \bbn\x::dump(\bbn\str::check_filename("Paul/"));
  // (bool) false
  ```
  
  @return bool
docstring_tokens: Checks if a string doesn t contain a filesystem path .