PHP code example of typedphp / optional

1. Go to this page and download the library: Download typedphp/optional library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

typedphp / optional example snippets




ypedPHP\Optional\Optional;

class Foo
{
    public function hello()
    {
        return new Bar();
    }
}

class Bar
{
    public function world()
    {
        return "hello world";
    }
}

$optional = new Optional(new Foo());
$optional->hello()->world()->value(); // "hello world"




ypedPHP\Optional\None;

$none = new None();
$none->hello()->world()->value(); // null




ypedPHP\Optional\None;

$none = new None();
$none
    ->none(function() { print "none"; }); // "none" printed
    ->value(function($value) { print $value; }); // $value not printed

use TypedPHP\Optional\Optional;

$optional = new Optional("hello world");
$optional
    ->none(function() { print "none"; }); // "none" not printed
    ->value(function($value) { print $value; }); // "hello world" printed