md5 - PHP code example

Using the MD5 PHP Function

PHP is an established web server-side scripting language that can be used for numerous purposes. One of the basic php functions is md5. This function performs a series of operations to transform an input string into a unique hexadecimal hash value. It is useful for a number of purposes, including verifying checksums and ensuring data integrity.

The md5 function in PHP uses the RSA Data Security, Inc. MD5 Message-Digest algorithm to create a unique hash value for an input string. This unique string is useful for comparing the original input against the hash result to ensure that they are identical. It is also used in digital signature applications. This process compresses and encrypts the input data so that it is difficult to change or reverse engineer the original data without accessing the key.

Using md5 in your PHP program is as easy as passing in the string that you want to hash. The md5() function will return the MD5 hash of the input string as a 32 character hexadecimal string. Alternatively, the optional $binary parameter can be set to TRUE to receive a raw binary version of the output. This is switched off by default.

While md5 is an excellent function for many purposes, it is not considered a strong cryptographic algorithm. It is susceptible to collision attacks that can compromise the original data integrity. As a result, it is not ideal for tasks such as encrypting passwords. However, it is still a fast algorithm and is therefore useful for other tasks such as generating unique identifiers.

md5 example

{
        $this->addCondition($condition, $query);
    }

    private function addCondition(CreateDateCondition $condition, QueryBuilder $query): void
    {
        $date = new DateTime();
        $intervalSpec = 'P' . $condition->getDays() . 'D';
        $interval = new DateInterval($intervalSpec);
        $date->sub($interval);

        $suffix = md5(json_encode($condition, JSON_THROW_ON_ERROR));
        $key = ':createDateFrom' . $suffix;

        $query->andWhere('product.datum >= ' . $key)
            ->setParameter($key, $date->format('Y-m-d'));
    }
}

    public function buildTimestampName($timestamp, Shop\Shop $shop, $suffix)
    {
        if ($shop->getMain()) {
            $shop = $shop->getMain();
        }

        $filename = $timestamp . '_' . md5($timestamp . $shop->getTemplate()->getId() . $shop->getId() . $this->release->getRevision());

        return $filename . '.' . $suffix;
    }

    /** * @return string */
    private function getBaseThemeDirectory()
    {
        return rtrim($this->templateDir, DIRECTORY_SEPARATOR);
    }

    $sort = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order LIMIT 1", $post, $order );

    $query        = "SELECT p.ID FROM $wpdb->posts AS p $join $where $sort";
    $key          = md5( $query );
    $last_changed = wp_cache_get_last_changed( 'posts' );
    if ( $in_same_term || ! empty( $excluded_terms ) ) {
        $last_changed .= wp_cache_get_last_changed( 'terms' );
    }
    $cache_key = "adjacent_post:$key:$last_changed";

    $result = wp_cache_get( $cache_key, 'post-queries' );
    if ( false !== $result ) {
        if ( $result ) {
            $result = get_post( $result );
        }

    /** * Fetches an entry from the cache. * * @param string $id cache id The id of the cache entry to fetch * * @return string the cached data or FALSE, if no cache entry exists for the given id */
    protected function doFetch($id)
    {
        return $this->cache->load($this->prefix . md5($id));
    }

    /** * Test if an entry exists in the cache. * * @param string $id cache id The cache id of the entry to check for * * @return bool TRUE if a cache entry exists for the given cache id, FALSE otherwise */
    protected function doContains($id)
    {

$options['locale'] = Zend_Locale::findLocale($options['locale']);
        } catch (Zend_Locale_Exception $e) {
            throw new Zend_Translate_Exception("The given Language '{$options['locale']}' does not exist", 0, $e);
        }

        if ($options['clear'] || !isset($this->_translate[$options['locale']])) {
            $this->_translate[$options['locale']] = array();
        }

        $read = true;
        if (isset(self::$_cache)) {
            $id = 'Zend_Translate_' . md5(serialize($options['content'])) . '_' . $this->toString();
            $temp = self::$_cache->load($id);
            if ($temp) {
                $read = false;
            }
        }

        if ($options['reload']) {
            $read = true;
        }

        if ($read) {

$ids = $criteria->getIds();
                $filtered = $entities[$definition]->filter(fn (Entity $entity) => \in_array($entity->getUniqueIdentifier(), $ids, true));

                $result->add($key, $filtered);
            }
        }
    }

    private function hash(Criteria $criteria): string
    {
        return md5(serialize($criteria));
    }
}

function get_page_by_path( $page_path, $output = OBJECT, $post_type = 'page' ) {
    global $wpdb;

    $last_changed = wp_cache_get_last_changed( 'posts' );

    $hash      = md5( $page_path . serialize( $post_type ) );
    $cache_key = "get_page_by_path:$hash:$last_changed";
    $cached    = wp_cache_get( $cache_key, 'post-queries' );
    if ( false !== $cached ) {
        // Special case: '0' is a bad `$page_path`.         if ( '0' === $cached || 0 === $cached ) {
            return;
        } else {
            return get_post( $cached, $output );
        }
    }

/** * @param string $password * @param string $hash * * @return bool */
    public function isPasswordValid($password, $hash)
    {
        $salt = 'A9ASD:_AD!_=%a8nx0asssblPlasS$';

        return hash_equals($hash, md5($salt . md5($password)));
    }

    /** * @param string $password * * @return string */
    public function encodePassword($password)
    {
        $salt = 'A9ASD:_AD!_=%a8nx0asssblPlasS$';

        return 'product-stream-' . $id;
    }

    /** * @param string[] $areas */
    public function getSalesChannelContextHash(SalesChannelContext $context, array $areas = []): string
    {
        $ruleIds = $context->getRuleIdsByAreas($areas);

        return md5((string) json_encode([
            $context->getSalesChannelId(),
            $context->getDomainId(),
            $context->getLanguageIdChain(),
            $context->getVersionId(),
            $context->getCurrencyId(),
            $context->getTaxState(),
            $context->getItemRounding(),
            $ruleIds,
        ], \JSON_THROW_ON_ERROR));
    }

ConditionInterface $condition,
        QueryBuilder $query,
        ShopContextInterface $context
    ) {
        $this->addCondition($condition, $query);
    }

    private function addCondition(WeightCondition $condition, QueryBuilder $query): void
    {
        $this->variantHelper->joinVariants($query);

        $min = ':minLength' . md5(json_encode($condition, JSON_THROW_ON_ERROR));
        $max = ':maxLength' . md5(json_encode($condition, JSON_THROW_ON_ERROR));

        if ($condition->getMinWeight() > 0) {
            $query->andWhere('allVariants.weight >= ' . $min);
            $query->setParameter($min, $condition->getMinWeight());
        }

        if ($condition->getMaxWeight() > 0) {
            $query->andWhere('allVariants.weight <= ' . $max);
            $query->setParameter($max, $condition->getMaxWeight());
        }
    }

    protected function get_events_transient_key( $location ) {
        $key = false;

        if ( isset( $location['ip'] ) ) {
            $key = 'community-events-' . md5( $location['ip'] );
        } elseif ( isset( $location['latitude'], $location['longitude'] ) ) {
            $key = 'community-events-' . md5( $location['latitude'] . $location['longitude'] );
        }

        return $key;
    }

    /** * Caches an array of events data from the Events API. * * @since 4.8.0 * * @param array $events Response body from the API request. * @param int|false $expiration Optional. Amount of time to cache the events. Defaults to false. * @return bool true if events were cached; false if not. */

$documentAttributes->fromArray($this->_config['attributes']);
                // Persist the attributes                 Shopware()->Models()->flush($documentAttributes);
            }

            $rowID = $checkForExistingDocument['id'];
            $bid = $checkForExistingDocument['docID'];
            $hash = $checkForExistingDocument['hash'];
        } else {
            // Create new document
            $hash = md5(uniqid((string) rand()));

            $useNet = $this->_order->order->taxfree ? true : ($this->_config['netto'] ?? null);
            $amount = $useNet ? round($this->_order->amountNetto, 2) : round($this->_order->amount, 2);
            if ($typID == 4) {
                $amount *= -1;
            }
            $sql = ' INSERT INTO s_order_documents (`date`, `type`, `userID`, `orderID`, `amount`, `docID`,`hash`) VALUES ( NOW() , ? , ? , ?, ?, ?,?) ';
            Shopware()->Db()->query($sql, [

function wp_cookie_constants() {
    /** * Used to guarantee unique hash cookies. * * @since 1.5.0 */
    if ( ! defined( 'COOKIEHASH' ) ) {
        $siteurl = get_site_option( 'siteurl' );
        if ( $siteurl ) {
            define( 'COOKIEHASH', md5( $siteurl ) );
        } else {
            define( 'COOKIEHASH', '' );
        }
    }

    /** * @since 2.0.0 */
    if ( ! defined( 'USER_COOKIE' ) ) {
        define( 'USER_COOKIE', 'wordpressuser_' . COOKIEHASH );
    }

/** * Constructor * * @param null|string $boundary * @access public * @return void */
    public function __construct($boundary = null)
    {
        // This string needs to be somewhat unique         if ($boundary === null) {
            $this->_boundary = '=_' . md5(microtime(1) . self::$makeUnique++);
        } else {
            $this->_boundary = $boundary;
        }
    }

    /** * Encode the given string with the given encoding. * * @param string $str * @param string $encoding * @param string $EOL EOL string; defaults to {@link Zend_Mime::LINEEND} * @return string */

ConditionInterface $condition,
        QueryBuilder $query,
        ShopContextInterface $context
    ) {
        $this->addCondition($condition, $query);
    }

    private function addCondition(PropertyCondition $condition, QueryBuilder $query): void
    {
        $tableKey = $condition->getName();

        $suffix = md5(json_encode($condition, JSON_THROW_ON_ERROR));

        if ($query->hasState('property_' . $tableKey)) {
            return;
        }
        $query->addState('property_' . $tableKey);

        $where = [];
        foreach ($condition->getValueIds() as $valueId) {
            $valueKey = ':' . $tableKey . '_' . $valueId . '_' . $suffix;
            $where[] = $tableKey . '.valueID = ' . $valueKey;
            $query->setParameter($valueKey, $valueId);
        }