laravel paginate filter code example

Example 1: collection laravel filter

$collection = collect([1, 2, 3, 4]);

$filtered = $collection->filter(function ($value, $key) {
    return $value > 2;
});

$filtered->all();

// [3, 4]

Example 2: laravel pagination with search filter

// if $id has value it will include "where('id','<',$id) else will return all"
$wells = DB::table('well_s')
        ->when($id, function ($query, $id) {
            return $query->where('id','<',$id);
        })
        ->paginate(20);