HasPersonName.php

<?php

namespace App;

trait HasPersonName
{
   
    public function getNameAttribute($name)
    {
        return new PersonName($name);
    }
}

PersonName.php

<?php

namespace App;

use Illuminate\Contracts\Support\Arrayable;

class PersonName implements Arrayable
{
    private $name;

    public function __construct($name)
    {
        $this->name = $name;
    }

    public function full()
    {
        return $this->name;
    }

    public function first()
    {
        return str_before($this->name, ' ');
    }

    public function last()
    {
        if (! str_contains($this->name, ' ')) {
            return null;
        }

        return str_after($this->name, ' ');
    }

    public function initials()
    {
        preg_match_all('/(?<=\s|^)[A-Z]/', $this->name, $matches);

        return implode('', head($matches));
    }

    public function abbreviated()
    {
        return $this->first()[0] . '. ' . $this->last();
    }

    public function sorted()
    {
        return $this->last() . ', ' . $this->first();
    }

    public function mentionable()
    {
        return strtolower($this->first() . $this->last()[0]);
    }

    public function possessive()
    {
        if (ends_with($this->name, 's')) {
            return $this->name . "'";
        }

        return $this->name . "'s";
    }

    public function familiar()
    {
        return $this->first() . ' ' . strtoupper($this->last()[0]) . '.';
    }

    public function __get($attribute)
    {
        return call_user_func([$this, $attribute]);
    }

    public function __toString()
    {
        return $this->name;
    }

    public function toArray()
    {
        return [
            'full'        => $this->name,
            'first'       => $this->first,
            'last'        => $this->last,
            'initials'    => $this->initials,
            'abbreviated' => $this->abbreviated,
            'sorted'      => $this->sorted,
            'mentionable' => $this->mentionable,
            'possessive'  => $this->possessive,
            'familiar'    => $this->familiar,
        ];
    }
}

PersonNameTest.php

<?php

namespace Tests\Unit;

use Tests\TestCase;
use Illuminate\Foundation\Testing\RefreshDatabase;
use App\PersonName;

class PersonNameTest extends TestCase
{
    function test_full_name()
    {
        $name = new PersonName('Terry Crews');

        $this->assertEquals('Terry Crews', $name->full);
    }

    function test_first_name()
    {
        $name = new PersonName('Terry Crews');

        $this->assertEquals('Terry', $name->first);
    }

    function test_last_name()
    {
        $name = new PersonName('Terry Crews');

        $this->assertEquals('Crews', $name->last);
    }

    function test_return_null_when_no_last_name()
    {
        $name = new PersonName('Terry');

        $this->assertEquals('', $name->last);
    }

    function test_initials()
    {
        $name = new PersonName('Terry A. Crews');

        $this->assertEquals('TAC', $name->initials);
    }

    function test_abbreviated_name()
    {
        $name = new PersonName('Terry Crews');

        $this->assertEquals('T. Crews', $name->abbreviated);
    }

    function test_sorted_name()
    {
        $name = new PersonName('Terry Crews');

        $this->assertEquals('Crews, Terry', $name->sorted);
    }

    function test_mentionable_name()
    {
        $name = new PersonName('Terry Crews');

        $this->assertEquals('terryc', $name->mentionable);
    }

    function test_possessive_name()
    {
        $name = new PersonName('Terry Crews');

        $this->assertEquals("Terry Crews'", $name->possessive);

        $name = new PersonName('Melissa Fumero');

        $this->assertEquals("Melissa Fumero's", $name->possessive);
    }

    function test_familiar_name()
    {
        $name = new PersonName('Terry Crews');

        $this->assertEquals("Terry C.", $name->familiar);
    }

    function test_full_name_when_object_cast_as_string()
    {
        $name = new PersonName('Terry Crews');

        $this->assertEquals('Terry Crews', (string) $name);
    }
}