PHP code example of phf / collection

1. Go to this page and download the library: Download phf/collection 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/ */

phf / collection example snippets


class Foo
{
    public StringCollection $bar;

    public function __construct()
    {
        $this->bar = new StringCollection();
    }
}

$foo = new Foo();
$foo->bar[] = 123; // throws InvalidArgumentException


class BarEntity
{
    public string $baz;
}

class BarCollection extends \PhF\Collection\Collection
{
    protected static $invalidElementMessageAllowed = BarEntity::class;

    public function validate(
        $value
    ): bool {
        return $value instanceof BarEntity;
    }
}

class Foo
{
    public BarCollection $bar;

    public function __construct()
    {
        $this->bar = new BarCollection();
    }
}