Script to clean up unused Magento images

jv_clean_product_images.php

#!/usr/bin/env php
<?php
/**
 * mh_remove_unused_product_images.php
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 *
 * @copyright   Copyright (c) 2014 Jeroen Vermeulen (http://www.jeroenvermeulen.eu)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

error_reporting(E_ALL | E_STRICT);
ini_set('display_errors', 1);

$magePaths = [ dirname(__FILE__).'/..', dirname(__FILE__), dirname(__FILE__).'/../..' ];
$tool = new Tool($magePaths);
$tool->run();

exit;

/**
 * Class Tool
 *
 * Tool to remove unused Magento images from disk.
 *
 * Looks for usage in:
 *   - Product media gallery
 *   - Product EAV attributes: small_image, thumbnail, image
 *   - These product attributes in flat tables
 *
 */
class Tool
{
    /** @var string - Path to the Magento root */
    protected $magePath;
    /** @var string - Path to the product images root */
    protected $imagesPath;
    /** @var mysqli - MySQLi database adapter object */
    protected $mysqli;
    /** @var string - Hostname of MySQL server */
    protected $dbHost;
    /** @var string - Username for MySQL server */
    protected $dbUser;
    /** @var string - Password for MySQL server */
    protected $dbWord;
    /** @var string - Database name for MySQL server */
    protected $dbName;
    /** @var string - Table prefix for database */
    protected $dbPrefix;
    /** @var array - Magento product attribute names which contain image paths */
    protected $imageFields = array('small_image', 'thumbnail', 'image');
    /** @var bool - True if script is executed using CLI */
    protected $cliRun = true;
    /** @var bool - True if script is executed using a browser, not recommended. */
    protected $webRun = false;

    /**
     * Constructor. Reads config and checks images path.
     *
     * @param $magePaths
     * @throws Exception
     */
    public function __construct($magePaths)
    {
        $this->beNice();
        $this->cliRun = ( isset( $_SERVER['TERM'] ) && 'dumb' != $_SERVER['TERM'] );
        $this->webRun = isset( $_SERVER['HTTP_HOST'] );

        if ( $this->webRun ) {
            header( "Content-Type: text/plain" );
        }

        foreach ($magePaths as $magePath) {
            $xmlFile = $magePath . '/app/etc/local.xml';
            if (is_readable($xmlFile)) {
                $this->magePath = $magePath;
                $this->imagesPath = realpath($this->magePath . '/media/catalog/product');
                printf("Using config: %s\n", $xmlFile);
                $xml = simplexml_load_file($xmlFile, 'SimpleXMLElement', LIBXML_NOCDATA);
                $this->dbHost = strval($xml->global->resources->default_setup->connection->host);
                $this->dbUser = strval($xml->global->resources->default_setup->connection->username);
                $this->dbName = strval($xml->global->resources->default_setup->connection->dbname);
                $this->dbWord = strval($xml->global->resources->default_setup->connection->password);
                $this->dbPrefix = strval($xml->global->resources->db->table_prefix);
                unset($xml);
                break;
            }
            $configFile = $magePath . '/app/etc/env.php';
            if (is_readable($configFile)) {
                $this->magePath = $magePath;
                $this->imagesPath = realpath($this->magePath . '/pub/media/catalog/product');
                printf("Using config: %s\n", $configFile);
                $mage2Config = include($configFile);
                $this->dbHost = $mage2Config['db']['connection']['default']['host'];
                $this->dbUser = $mage2Config['db']['connection']['default']['username'];
                $this->dbName = $mage2Config['db']['connection']['default']['dbname'];
                $this->dbWord = $mage2Config['db']['connection']['default']['password'];
                $this->dbPrefix = $mage2Config['db']['table_prefix'];
                unset($mage2Config);
            }
        }

        if (empty($this->magePath)) {
            throw new Exception("ERROR: Magento not found.\n");
        }

        // Check images path
        if (!is_dir($this->imagesPath)) {
            throw new Exception(sprintf("ERROR: Product images directory '%s' does not exist.\n", $this->imagesPath));
        }
    }

    /**
     * Runs the actual tool.
     *
     * @return bool
     * @throws Exception
     */
    public function run()
    {
        // Open database connection
        $this->mysqli = new mysqli($this->dbHost, $this->dbUser, $this->dbWord, $this->dbName);
        if ($this->mysqli->connect_errno) {
            throw new Exception(sprintf("ERROR: Failed to connect to MySQL: %s\n", $this->mysqli->connect_error));
        }

        // Add media gallery imags
        $dbImages = $this->getQueryColumn(
            sprintf("SELECT `value` FROM `%scatalog_product_entity_media_gallery`",
                $this->dbPrefix));

        // Add images from product attributes
        $attrIds = $this->getQueryColumn(
            sprintf("SELECT `attribute_id`
                      FROM `%seav_attribute` INNER JOIN `%seav_entity_type` USING (`entity_type_id`)
                      WHERE `entity_type_code` = 'catalog_product'
                      AND `attribute_code` IN (%s)",
                $this->dbPrefix, $this->dbPrefix, "'" . implode("','", $this->imageFields) . "'"));
        $eavImages = $this->getQueryColumn(
            sprintf("SELECT `value` FROM `%scatalog_product_entity_varchar` WHERE `attribute_id` IN (%s)",
                $this->dbPrefix, implode(',', $attrIds)));
        $dbImages = array_merge($dbImages, $eavImages);

        // Add images from flat tables, to be sure we don't break the current site
        $flatTables = $this->getQueryColumn(
            sprintf("SHOW TABLES LIKE '%scatalog_product_flat_%%'", $this->dbPrefix));
        foreach ($flatTables as $flatTable) {
            foreach ($this->imageFields as $field) {
                if ($this->fieldExists($flatTable, $field)) {
                    $fieldImages = $this->getQueryColumn(sprintf("SELECT `%s` FROM `%s`", $field, $flatTable));
                    $dbImages = array_merge($dbImages, $fieldImages);
                }
            }
        }

        // Make array unique, convert to real filename
        $dbImages = array_unique($dbImages);
        $dbInvalidCount = 0;
        $keys = array_keys($dbImages); // Save keys because we will manipulate array
        foreach ($keys as $key) {
            $dbImages[$key] = trim($dbImages[$key]);
            if (empty($dbImages[$key])) {
                unset($dbImages[$key]);
            } else {
                $fullPath = realpath($this->imagesPath . $dbImages[$key]);
                if (false === $fullPath) {
                    // Finding path failed, filename from database does not exist on filesystem, ignore
                    unset($dbImages[$key]);
                    $dbInvalidCount++;
                } elseif (0 !== strpos($fullPath, $this->imagesPath)) {
                    // Something wrong, file is outside product images root, for example contains '../'
                    printf("Warning: Image path outside image root used: '%s'.\n", $fullPath);
                    unset($dbImages[$key]);
                    $dbInvalidCount++;
                } else {
                    $dbImages[$key] = $fullPath;
                }
            }
        }
        $dbImages = array_unique($dbImages); // After realpath some paths may be the same
        printf("Found %d invalid images in database.\n", $dbInvalidCount);
        printf("Found %d valid images in database.\n", count($dbImages));

        // Close database connection, we don't need it anymore
        $this->mysqli->close();

        // Find images on filesystem using shell command "find"
        $imageFiles = array();
        chdir($this->imagesPath);
        // Look for images in all subdirs 1 that are 1 char lang
        exec('find ./? -type f', $imageFiles);
        printf("Found %d image files on disk.\n", count($imageFiles));

        // Compare and build list of images to delete
        $dbImageFlip = array_flip($dbImages);
        $deleteList = array();
        $deleteSize = 0;
        foreach ($imageFiles as $imageFile) {
            if ('./' == substr($imageFile, 0, 2)) {
                $imageFile = substr($imageFile, 2);
            }
            $fullFilePath = $this->imagesPath . '/' . $imageFile;

            if (!isset($dbImageFlip[$fullFilePath])) {
                if (is_writable($fullFilePath)) {
                    $deleteList[] = $fullFilePath;
                    $deleteSize += filesize($fullFilePath) / 1024 / 1024; // Add in Mb
                } else {
                    printf("Warning: File '%s' is not writable, skipping.\n", $fullFilePath);
                }
            }
        }

        // Let the user descide what to do
        if (empty($deleteList)) {
            echo "Found no images to clean up.\n";
        } else {
            printf("Found %d image files to be deleted, %.02f Mb. ", count($deleteList), $deleteSize );
            if ($this->cliRun) {
                echo "Are you sure (y/N)? ";
                $handle = fopen("php://stdin", "r");
                $userInput = fgets($handle);
                if (strtolower(substr(trim($userInput), 0, 1)) != 'y') {
                    echo "ABORTING!\n";
                    return false;
                }
            }
            echo "\n";
            // The actual deletion of the files
            foreach ($deleteList as $deleteFile) {
                unlink($deleteFile);
            }
            // Remove empty dirs
            shell_exec(sprintf('find %s -depth -type d -empty -exec rmdir {} \;', $this->imagesPath));
        }

        echo "Done.\n";
        return true;
    }

    /**
     * Execute a query and return the MySQLi result object
     *
     * @param string $query
     * @return mysqli_result
     * @throws Exception
     */
    protected function sqlQuery($query)
    {
        $queryResult = $this->mysqli->query($query);
        if (!$queryResult) {
            throw new Exception(sprintf("ERROR: Error '%s' running query '%s'.\n", $this->mysqli->error, $query));
        }
        return $queryResult;
    }

    /**
     * Execute a query, and return the first field of each resulting row, in one array.
     *
     * @param $query
     * @return array
     * @throws Exception
     */
    protected function getQueryColumn($query)
    {
        $result = array();
        $queryResult = $this->sqlQuery($query);
        while ($row = $queryResult->fetch_row()) {
            $result[] = strval($row[0]);
        }
        return $result;
    }

    /**
     * Check if a field exists in a table in the database
     *
     * @param $table
     * @param $column
     * @return bool
     * @throws Exception
     */
    protected function fieldExists($table, $column)
    {
        $queryResult = $this->sqlQuery(sprintf("SHOW COLUMNS FROM `%s` LIKE '%s'", $table, $column));
        return (0 < $queryResult->num_rows);
    }

    /**
     * Be nice to other processes in disk and CPU usage.
     * We give this script low priority so we don't bother more important processes.
     */
    protected function beNice()
    {
        proc_nice(19);
        if (file_exists('/usr/bin/ionice')) {
            shell_exec(sprintf('/usr/bin/ionice -c 3 -p %d', getmypid()));
        }
    }
}

I was getting 500 error. I then managed to get it run via browser by modify the following codes. I did not check thoroughly if it deletes the correct unused images though. Hope someone else can test it out and give us a comment.

FYI: I have 3GB in media/catalog folder and after running the script it becomes 980MB.

Procedure step 1:
Change:
from: $magePath = dirname(__FILE__) . '/..';
to: $magePath = dirname(__FILE__) . '/';.

It will ask you if you want to delete the used images but immediately abort the task. Since somehow the browser did not prompt for input (Y/N), after checking the images count then do the step 2.

Procedure step 2:
I comment out the following codes and run it again:

if( strtolower( substr( trim($userInput), 0, 1) ) != 'y' ) { echo " ABORTING!\n"; return false; }

Beautiful! If I understand correctly, this script will delete the images that are no longer linked to no product ... That is, if I have only "disabled" products, in this case the images will not be deleted? It is important to keep them for me ... Also how do I run the script? Load in the foot and what do I type in the URL? Thank you

I have just updated the Gist to a more recent version of my script.
It does not remove images from "Disabled" products.
The script is meant to be put in the shell dir of your Magento install and execute using an SSH shell.

Thank you for answering! Where's Gist? Can't it also run from browser, Please? What are the commands via ssh? Sorry for this question. But I'm not ssh practice. Thank you!

@Ang90 The Gist is the page you are looking at. I have updated the script so you can put it in the webroot (httpdocs or public_html etc) and execute it from a web browser. Then you don't need SSH. I am sorry but I can't give any further support. Please ask a fellow developer to help you if needed.