#!/usr/bin/env php
<?php set_time_limit(0);

$_SERVER['DOCUMENT_ROOT']  = ".";

define("NO_KEEP_STATISTIC", true);
define("NOT_CHECK_PERMISSIONS", true);

$prolog = $_SERVER['DOCUMENT_ROOT'] . "/bitrix/modules/main/include/prolog_before.php";
if (file_exists($prolog)) include($prolog); else die("Указанный каталог не является корневой директорией сайта на 1С-Битрикс" . PHP_EOL);

$arFilesCache = array();
$result = $DB->Query('SELECT ID, FILE_NAME, SUBDIR FROM b_file WHERE MODULE_ID = "iblock"');
while ($row = $result->Fetch()) {
    $arFilesCache[$row["ID"]] = $row['SUBDIR'] . '/' . $row['FILE_NAME'];
}

$f = fopen($_SERVER["DOCUMENT_ROOT"] . "/duplicates.txt", "r");
$dublicates = [];

while(!feof($f)) {
    $data = explode("./", fgets($f));
    $imPath = trim($data[1]);
    if ($imPath !== null && $imPath !== "") {
        $dublicates[] = "iblock/" . trim($data[1]);
    }
}

foreach ($arFilesCache as $id => $path) {
    if ($path !== "") {
        if (in_array($path, $dublicates)) {
            if (strpos($path, '.png') !== false ||
                strpos($path, '.jpg') !== false) {
                CFile::delete($id);
            }
        }
    }
}