PHP

laravel has many

 public function comments()
 {
   return $this->hasMany(Comment::class);
 }

laravel has many

<?php

namespace AppModels;

use IlluminateDatabaseEloquentModel;

class Post extends Model
{
    /**
     * Get the comments for the blog post.
     */
    public function comments()
    {
        return $this->hasMany('AppModelsComment');
    }
}

laravel has many with ids

class Post extends Model
{
  public function comments()
  {
  	return $this->hasMany(Comment::class, 'foreign_key', 'local_key');
 // local id is the main id Of post table such as : id
 // foreign id is the post table which is inside comment table such as: post_id
    //return $this->hasMany(Comment::class, 'post_id', 'id');  
    //return $this->hasMany(Comment::class, 'post_id'); 


  }
}