php download pictures

<?php

include "../config/test.php";

$books = new Database($db_books);

$sql = "select  pic from books ";

$data = $books->fetch_rows($sql);

foreach($data as $img) {

    $img = $img['pic'];

     $contents = file_get_contents($img);

    $index = strpos($img, "?");

    echo "index : ". $index . PHP_EOL;

    if($index) {

        $filename = substr($img, 0, $index);

    }

    $pic = APP_ROOT  . '/images/' . array_pop(explode("/", $filename));

    

    file_put_contents($pic, $contents);

    echo $pic . " download finished " . PHP_EOL;

}