Eloquent ORM

Quick Introduction

Eloquent ORM is a single PHP idea you'll use in almost every backend project.

In this lesson you learn only eloquent orm — not five topics at once. By the end you can write a small working example and explain it in an interview.

We connect each lesson to our course projects: Login System, Blog CMS, REST API, Inventory, Employee Management, and E-Commerce Backend.

Business Problem

You're building the Blog CMS. After a user signs in, you need eloquent orm working correctly before storing data or showing a dashboard.

Without understanding Eloquent ORM, the team ships bugs: wrong totals, broken sessions, or type errors that only appear in production. This lesson fixes that with one clear pattern you can copy into your project today.

Core Concept

• Eloquent ORM is one focused idea — learn it before mixing with other PHP topics.
• Use it in PHP 8.3+ with declare(strict_types=1); at the top of every file.
• Our course project (Blog CMS) uses eloquent orm in real handlers.
• Run small scripts with php file.php after each change — don't just read.
• Interviewers ask for a one-minute explanation plus a tiny code sample.

Syntax

Core syntax for Eloquent ORM. Every keyword below appears in production PHP — Laravel and Symfony use the same primitives under the hood.

declare(strict_types=1);

Keywords: declare · strict_types · namespace

Step-by-Step Example

Run this script locally. Change one value, run again, and watch what changes.

<?php
declare(strict_types=1);

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;

final class Customer extends Model
{
    protected $fillable = ['name', 'email'];

    public function orders(): HasMany
    {
        return $this->hasMany(Order::class);
    }
}

// Eager load to avoid N+1
$customers = Customer::with(['orders' => fn ($q) => $q->where('status', 'paid')])
    ->where('active', true)
    ->get();

Line by line

1. — part of the eloquent orm example; run the file to see the result.
2. declare(strict_types=1); — turns on strict type checking for this file.
3. namespace App\Models; — part of the eloquent orm example; run the file to see the result.
4. use Illuminate\Database\Eloquent\Model; — part of the eloquent orm example; run the file to see the result.
5. use Illuminate\Database\Eloquent\Relations\HasMany; — part of the eloquent orm example; run the file to see the result.

Authenticated

Real-World Example

In the Blog CMS, eloquent orm appears in a single request handler — not spread across ten files. Keep the example small, test it with php, then paste the pattern into your project branch.

<?php
declare(strict_types=1);

// TODO: Eloquent ORM exercise for Blog CMS