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Interface

Object interfaces allow to create code which specifies which methods a class must implement, without having to define how these methods are implemented.

Interfaces may have methods signatures, without a body, constants. Since version 8.4, they may also have properties, as long as the property is public, and the hooks are abstract, or without body.

<?php

    // Declare the interface 'Template'
    interface Template
    {
        public const A = 1;

        private string $p {
            get;
        }

        public function setVariable($name, $var);
        public function getHtml($template);
    }
    
    // Implement the interface
    class WorkingTemplate implements Template
    {
        private $vars = [];
      
        public function setVariable($name, $var)
        {
            $this->vars[$name] = $var;
        }
      
        public function getHtml($template)
        {
            foreach($this->vars as $name => $value) {
                $template = str_replace('{' . $name . '}', $value, $template);
            }
     
            return $template;
        }
    }

?>

Documentation

See Also