PHP code example of ghostwriter / option

1. Go to this page and download the library: Download ghostwriter/option 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/ */

ghostwriter / option example snippets


use Ghostwriter\Option\Exception\NullPointerException;
use Ghostwriter\Option\None;
use Ghostwriter\Option\Some;

$greeting = Some::new('Hello World!');
echo $greeting->unwrap();        // 'Hello World!'


$name = None::new();
echo $name->unwrap();                  // throw `NullPointerException`
echo $name->unwrapOr('Default Value'); // 'Default Value'

None::new();            // return `None`
Some::nullable(null);   // return `None`
Some::new(null);        // throw `NullPointerException`

--- Example

function divide(int $x, int $y): OptionInterface
{
    if ($y === 0) {
        return None::new();
    }

    return Some::new($x / $y);
}

divide(1, 0); // None
divide(1, 1); // Some(1)