Doctrine

With DoctrineBundle, the bundle registers the column type phil_phone: a PhoneNumber in a VARCHAR(33), in E.164 with its extension as RFC 3966 writes it, +15145550123;ext=12. Thirty-three characters hold the longest number PhoneNumber::parse() accepts: +, a country code of three digits, a national number of seventeen, ;ext= and an extension of seven. A column created as VARCHAR(32) is widened by the next migration Doctrine generates.

#[ORM\Column(type: 'phil_phone', nullable: true)]
private ?PhoneNumber $phone = null;

A value that is not a PhoneNumber is refused on writing; a stored text that is no number, on reading.