https://styde.net/encapsulamiento-y-uso-de-getters-y-setters-en-php/
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December 3, 2021 18:38
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Lección 2: Encapsulamiento, getters y setters en PHP
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| <?php | |
| class Person | |
| { | |
| protected $firstName; // public, protected <-> private | |
| protected $lastName; | |
| protected $nickname; | |
| protected $changedNickname = 0; | |
| public function __construct($firstName, $lastName) | |
| { | |
| $this->firstName = $firstName; | |
| $this->lastName = $lastName; | |
| } | |
| // public function setFirstName($firstName) | |
| // { | |
| // $this->firstName = $firstName; | |
| // } | |
| public function getFirstName() | |
| { | |
| return $this->firstName; | |
| } | |
| public function getLastName() | |
| { | |
| return $this->lastName; | |
| } | |
| // public function setNickname($nickname) | |
| // { | |
| // if (! empty($nickname)) { | |
| // $this->nickname = $nickname; | |
| // } | |
| // } | |
| // public function setNickname($nickname) | |
| // { | |
| // if ($this->changedNickname < 2) { | |
| // $this->nickname = $nickname; | |
| // $this->changedNickname++; | |
| // } | |
| // } | |
| public function setNickname($nickname) | |
| { | |
| if ($this->changedNickname >= 2) { | |
| throw new Exception( | |
| "You can't change a nickname more than 2 times" | |
| ); | |
| } | |
| $this->nickname = $nickname; | |
| $this->changedNickname++; | |
| } | |
| public function getNickname() | |
| { | |
| return $this->nickname; | |
| } | |
| public function getFullName() | |
| { | |
| return $this->firstName . ' ' . $this->lastName; | |
| } | |
| } | |
| $person1 = new Person('Duilio', 'Palacios'); | |
| $person1->setNickname('Silence'); | |
| $person1->setNickname('Sileence'); | |
| // $person1->setNickname('duilio'); | |
| exit($person1->getNickname()); | |
| //------------------------------------------------------------------------------ | |
| // Output for PHP 7.4.14 | |
| //------------------------------------------------------------------------------ | |
| // Sileence | |
| //------------------------------------------------------------------------------ |
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Agrega validación adicional para que el usuario sólo pueda agregar nicknames que tengan al menos 2 caracteres (y sea una cadena de texto) y no sean igual a su nombre o apellido.
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Agrega la propiedad «fecha de nacimiento» a la clase persona, y que esta propiedad pueda pasarse a través del constructor. Luego crea un método para obtener la edad del usuario (getAge), por supuesto la edad la vas a calcular a partir de la fecha de nacimiento.
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| <?php | |
| class Person | |
| { | |
| protected $firstName; | |
| protected $lastName; | |
| protected $nickname; | |
| protected $changedNickname = 0; | |
| private $dateOfBirth; | |
| public function __construct($firstName, $lastName, $dateOfBirth) | |
| { | |
| $this->firstName = $firstName; | |
| $this->lastName = $lastName; | |
| $this->dateOfBirth = $this->validateDate($dateOfBirth); | |
| } | |
| private function validateDate($date, $format = 'Y-m-d') | |
| { | |
| $d = DateTime::createFromFormat($format, $date); | |
| if (!$d || $d->format($format) !== $date) { | |
| throw new Exception( | |
| 'Invalid date' | |
| ); | |
| } | |
| return $date; | |
| } | |
| public function getDateOfBirth() | |
| { | |
| return $this->dateOfBirth; | |
| } | |
| /** | |
| * Calculate age using $this->dateOfBirth | |
| */ | |
| public function getAge() | |
| { | |
| $from = new DateTime($this->dateOfBirth); | |
| $to = new DateTime('today'); | |
| $age = $from->diff($to)->y; | |
| return $age; | |
| } | |
| public function getFirstName() | |
| { | |
| return $this->firstName; | |
| } | |
| public function getLastName() | |
| { | |
| return $this->lastName; | |
| } | |
| public function setNickname($nickname) | |
| { | |
| if ($this->changedNickname >= 2) { | |
| throw new Exception( | |
| "You can't change a nickname more than 2 times" | |
| ); | |
| } | |
| if (strlen($nickname) < 2 || !is_string($nickname)) { | |
| throw new Exception( | |
| 'Nickname must be at least 2 characters long and be a string' | |
| ); | |
| } | |
| if ($nickname==$this->firstName || $nickname==$this->lastName) { | |
| throw new Exception( | |
| 'Nickname must be different from first and last name' | |
| ); | |
| } | |
| $this->nickname = $nickname; | |
| $this->changedNickname++; | |
| } | |
| public function getNickname() | |
| { | |
| return $this->nickname; | |
| } | |
| public function getFullName() | |
| { | |
| return $this->firstName . ' ' . $this->lastName; | |
| } | |
| } | |
| $person1 = new Person('John', 'Doe', '1980-12-01'); | |
| // $person1->setNickname('j'); | |
| // $person1->setNickname(12); | |
| // $person1->setNickname('John'); | |
| // $person1->setNickname('Doe'); | |
| $person1->setNickname('JD'); | |
| $nl = strpos(PHP_SAPI, 'apache') !== FALSE ? '<br>' : chr(10); | |
| echo $person1->getNickname() . $nl . $person1->getAge(); | |
| //------------------------------------------------------------------------------ | |
| // Output for PHP 7.4.14 | |
| //------------------------------------------------------------------------------ | |
| // JD | |
| // 40 | |
| //------------------------------------------------------------------------------ |
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