Invalid parameter number in eloquent - php

Question

I've got this query :
use Illuminate\Database\Capsule\Manager as DB;
$arr = [/* Array values here */];
$in = str_repeat('?,', count($arr) - 1) . '?';
$str = "SELECT ... FROM ... WHERE ... AND ... IN ($in)";
$select_categories = DB::select($str, $arr);
Now I'm getting the error Uncaught PDOException: SQLSTATE[HY093]: Invalid parameter number, this is the stack trace :
/var/www/vendor/illuminate/database/Connection.php:330 Stack trace: #0 /var/www/vendor/illuminate/database/Connection.php(330): PDOStatement->execute() #1 /var/www/vendor/illuminate/database/Connection.php(657): Illuminate\Database\Connection->Illuminate\Database{closure}('SELECT categori...', Array) #2 /var/www/vendor/illuminate/database/Connection.php(624): Illuminate\Database\Connection->runQueryCallback('SELECT categori...', Array, Object(Closure)) #3 /var/www/vendor/illuminate/database/Connection.php(333): Illuminate\Database\Connection->run('SELECT name...', Array, Object(Closure)) #4 /var/www/vendor/illuminate/database/Capsule/Manager.php(199): Illuminate\Database\Connection->select('SELECT name...', Array) #5 /var/www/categ.class.php(81): Illuminate\Database\Capsule\Manager::__callStatic('select', Array) #6 /var/www/categ.class.php(123): Site\Naviga in /var/www/vendor/illuminate/database/Connection.php on line 664
I don't get why this is happening. I'm trying to echo the variables $str and $arr to try and see if the number of ? matches the count of the array and indeed it does. So I can't see why is that error being generated. Any idea?
In the stack there are 3 arguments run('SELECT name...', Array, Object(Closure)), maybe this is causing the issue as it thinks there is a third parametre which there isn't? Or something like that?
EDIT :
$str contains : "?,?,?,?,?,?"
$arr contains : [94, 91, 97, 92, 96, 90]
Result of dd($str, $arr); :
"SELECT ... FROM ... WHERE ... IN (?,?,?,?,?,?,?,?,?,?,?,?,?,?) ORDER BY pro.sort_order"
array:14 [
0 => "56"
1 => "163"
4 => "64"
6 => "53"
7 => "52"
10 => "55"
12 => "59"
13 => "57"
28 => "157"
43 => "60"
49 => "133"
68 => "287"
101 => "54"
109 => "278"
]

Answer 1

The solution is to use array_values($arr) instead of $arr in the select() method:
$select_categories = DB::select($str, array_values($arr));
$in has 14 ? and $arr has 14 elements. The reason why it does not work is because indexes of $arr are not from 0 to 13 but from 0 to 109. Since indexes are integer and not string, all of them from 0 to 109 exist even if some are null, so the size of $arr is 110.
The effect of using array_values() on $arr:
array:14 [
0 => "56"
1 => "163"
2 => "64"
3 => "53"
4 => "52"
5 => "55"
6 => "59"
7 => "57"
8 => "157"
9 => "60"
10 => "133"
11 => "287"
12 => "54"
13 => "278"
]