49 lines
586 B
PHP
49 lines
586 B
PHP
<?php
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// Dependency Inversion Principle Violation
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class Mailer
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{
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}
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class SendWelcomeMessage
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{
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private $mailer;
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public function __construct(Mailer $mailer)
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{
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$this->mailer = $mailer;
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}
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}
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// Refactored
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interface Mailer
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{
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public function send();
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}
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class SmtpMailer implements Mailer
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{
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public function send()
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{
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}
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}
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class SendGridMailer implements Mailer
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{
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public function send()
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{
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}
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}
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class SendWelcomeMessage
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{
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private $mailer;
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public function __construct(Mailer $mailer)
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{
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$this->mailer = $mailer;
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}
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}
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