public function isSurroundedByAlnum($pos, $len)
	{
		return ($pos > 0 && $this->isAlnum($this->text[$pos - 1]) && $this->isAlnum($this->text[$pos + $len]));
	}
public function isSurroundedByAlnum($pos, $len)
	{
		return ($pos > 0 && $this->isAlnum($this->text[$pos - 1]) && $this->isAlnum($this->text[$pos + $len]));
	}
public function isSurroundedByAlnum ( $ pos , $ len ) { return ( $ pos > 0 && $ this -> isAlnum ( $ this -> text [ $ pos - 1 ] ) && $ this -> isAlnum ( $ this -> text [ $ pos + $ len ] ) ) ; }
Test whether a length of text is surrounded by alphanumeric characters

@param  integer $pos Start of the text
@param  integer $len Length of the text
@return bool
Test whether a length of text is surrounded by alphanumeric characters