<?php

$db = new mysqli('localhost', 'root', '5z#JaL');
$db->select_db('crm');

$files = glob('/var/www/html/crm/upload/*');

shuffle($files);
$files = array_slice($files, 0, 10000);

// loop files
$deletedSum = 0;
$exisstSum = 0;
foreach($files as $file){
    $f = end(explode('/', $file));
    $res = $db->query("SELECT id FROM documents WHERE document_revision_id = '$f'");
    if ($res->num_rows === 0) {
        unlink($file);
        $deletedSum++;
    } else {
        $exisstSum++;
        // move file
        rename($file, '/var/www/html/crm/upload2/' . $f);
    }
}
var_dump($exisstSum);
var_dump($deletedSum);