Laravel Eloquent inner join with multiple conditions

To perform an inner join with multiple conditions using Laravel's Query Builder, you can use the join method on a query builder instance. Here's an example:

Example of performing an inner join with multiple conditions

<?php

use Illuminate\Support\Facades\DB;

$users = DB::table('users')
  ->join('contacts', function ($join) {
    $join->on('users.id', '=', 'contacts.user_id')->orOn('users.id', '=', 'contacts.manager_id');
  })
  ->get();

This will perform an inner join between the users and contacts tables, using the $join closure to specify the join conditions. The orOn method allows you to specify additional conditions for the join using an OR statement.

You can also use the where method in the closure to specify additional conditions for the join, like this:

Example of adding where conditions to a Laravel join

<?php

use Illuminate\Support\Facades\DB;

$users = DB::table('users')
  ->join('contacts', function ($join) {
    $join
      ->on('users.id', '=', 'contacts.user_id')
      ->orOn('users.id', '=', 'contacts.manager_id')
      ->where('contacts.user_id', '>', 5);
  })
  ->select('users.*', 'contacts.phone')
  ->get();

This will perform the inner join with the additional condition contacts.user_id > 5. Note that when joining tables with overlapping column names, using select() to specify columns and table aliases helps prevent ambiguity.

For complex multi-condition joins, the Query Builder is often preferred over Eloquent relationships, as it provides more direct control over the generated SQL.

I hope this helps! Let me know if you have any questions.