<?php
require __DIR__.'/vendor/autoload.php';
$app = require_once __DIR__.'/bootstrap/app.php';
$kernel = $app->make(Illuminate\Contracts\Console\Kernel::class);
$kernel->bootstrap();

$res = [];
foreach(['0','1','2','3','4','5','6','7','8','9'] as $d) {
   $b = App\Models\Buku::where('nomor_panggil', 'like', $d.'%')->whereNotNull('lokasi_x')->first();
   $res[$d.'00'] = $b ? ['x' => $b->lokasi_x, 'y' => $b->lokasi_y] : null;
}
echo json_encode($res);