yf_user_ban class

    public function __construct()
    {
        // First we need to get all "user_ban" checks from db
        $Q = db()->query('SELECT * FROM ' . db('user_ban') . '');
        while ($A = db()->fetch_assoc($Q)) {
            $this->BAN_CHECKS[$A['id']] = $A;
        }
        // TODO: need to move into sys cache
    }

    public function _check($input = [], $user_info = [])
    {
        // Default banned status
        $BANNED_STATUS = false;
        // Nothing to check
        if (empty($input) || empty($input['user_id'])) {
            return $BANNED_STATUS;
        }
        // Default user ban fields
        $ban_fields = [
            'ban_ads' => 0,
            'ban_reviews' => 0,
            'ban_images' => 0,
            'ban_email' => 0,
            'ban_forum' => 0,
            'ban_comments' => 0,
            'ban_blog' => 0,
            'ban_bad_contact' => 0,
            'ban_reput' => 0,
        ];
        $ban_reasons = [];
        // Start process ban checks
        foreach ((array) $this->BAN_CHECKS as $CUR_CHECKS) {
            // Process input fields
            foreach ((array) $input as $input_name => $input_value) {
                // Switch between active checks
                $WHAT_FOUND = $this->_try_to_find($input_name, $CUR_CHECKS, $input_value);
                if ( ! $WHAT_FOUND) {
                    continue;
                }
                // Process ban status if found one
                $BANNED_STATUS = true;
                // Try to find ban reasons
                foreach ((array) $ban_fields as $ban_name => $ban_value) {
                    // User already banned for this type
                    if ($ban_value == 1 || empty($CUR_CHECKS[$ban_name])) {
                        continue;
                    }
                    // Else - do ban current type
                    $ban_fields[$ban_name] = 1;
                    $ban_reasons[$input_name] = $WHAT_FOUND;
                }
            }
        }
        // Create SQL query for the user table
        $sql3 = [];
        foreach ((array) $ban_fields as $ban_name => $new_ban_value) {
            // No need to change ban status
            if ($new_ban_value == 0) {
                continue;
            }
            // Check if this ban type is already banned for the current user
            if ( ! empty($user_info) && $user_info[$ban_name] == $new_ban_value) {
                continue;
            }
            // Do add SQL for the update query
            $sql3[] = ' ' . _es($ban_name) . "='1' ";
        }
        // Do update user's table (if needed)
        if ( ! empty($sql3)) {
            $NEW_ADMIN_COMMENTS = "\r\n==============\r\nAuto-banned on " . _format_date(time()) . ' (action: ' . ($_GET['object'] ?? null) . '->' . ($_GET['action'] ?? null) . '; ' . implode(',', $ban_reasons) . ')';
            $sql4 = 'UPDATE ' . db('user') . ' SET 
					' . implode(',', $sql3) . ", 
					admin_comments = CONCAT(admin_comments, '" . _es($NEW_ADMIN_COMMENTS) . "')
				WHERE id=" . (int) ($input['user_id']);
            db()->query($sql4);
        }
        return $BANNED_STATUS;
    }

    public function _complex_phone_search($input_text = '', $phone = '')
    {
        if (empty($phone) || empty($input_text)) {
            return false;
        }
        $pattern = '';
        // Prepare regexp (we need to check different chunks)
        for ($i = 0; $i < strlen($phone); $i++) {
            $cur_symbol = (int) ($phone[$i]);
            $pattern .= '[^0-9]{0,3}' . $cur_symbol;
        }
        // Cut all repeated tabs, spaces, CR, LF
        $input_text = preg_replace("/[\s\t\r\n]+/ims", ' ', $input_text);
        // Try to match prepared pattern
        return preg_match('/' . $pattern . '/ims', $input_text);
    }

    public function _search_item($where_search = '', $what_to_search = '')
    {
        $IS_FOUND = false;
        if ($this->USE_REGEXES) {
            $IS_FOUND = @preg_match('/' . str_replace('/', "\/", $what_to_search) . '/ims', $where_search);
        } else {
            $IS_FOUND = (false !== strpos($where_search, $what_to_search));
        }
        return $IS_FOUND;
    }

    public function _try_to_find($input_name = '', $CUR_CHECKS = [], $where_search = '')
    {
        // Default value
        $IS_FOUND = false;
        $WHAT_FOUND = '';
        // Stop here if missing some params
        $what_to_find = $CUR_CHECKS[$input_name];
        if (empty($input_name) || empty($CUR_CHECKS) || ! strlen($where_search)) {
            return $IS_FOUND;
        }
        // Switch between active checks
        if (strlen($what_to_find) && in_array($input_name, ['name', 'email', 'password', 'phone', 'fax', 'url', 'recip_url'])) {
            $IS_FOUND = $this->_search_item($where_search, $what_to_find);
            $_where_searched = $where_search;
        }
        if ($input_name == 'text') {
            if (strlen($what_to_find)) {
                $IS_FOUND = $this->_search_item($where_search, $what_to_find);
                $_where_searched = $where_search;
            }
            // Also check for emails and phones
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['email'])) {
                $IS_FOUND = $this->_search_item($where_search, $CUR_CHECKS['email']);
                $_where_searched = 'email';
            }
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['phone'])) {
                $IS_FOUND = $this->_search_item($where_search, $CUR_CHECKS['phone']);
                $_where_searched = 'phone';
            }
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['fax'])) {
                $IS_FOUND = $this->_search_item($where_search, $CUR_CHECKS['fax']);
                $_where_searched = 'fax';
            }
            // Complex search
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['phone'])) {
                $IS_FOUND = $this->_complex_phone_search($where_search, $CUR_CHECKS['phone']);
                $_where_searched = 'phone';
            }
            // Complex search
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['fax'])) {
                $IS_FOUND = $this->_complex_phone_search($where_search, $CUR_CHECKS['fax']);
                $_where_searched = 'fax';
            }
        }
        if (in_array($input_name, ['ad_text', 'forum_text', 'comment_text', 'email_text'])) {
            if (strlen($what_to_find)) {
                $IS_FOUND = $this->_search_item($where_search, $what_to_find);
                $_where_searched = $where_search;
            }
            // Also check for emails and phones
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['email'])) {
                $IS_FOUND = $this->_search_item($where_search, $CUR_CHECKS['email']);
                $_where_searched = 'email';
            }
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['phone'])) {
                $IS_FOUND = $this->_search_item($where_search, $CUR_CHECKS['phone']);
                $_where_searched = 'phone';
            }
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['fax'])) {
                $IS_FOUND = $this->_search_item($where_search, $CUR_CHECKS['fax']);
                $_where_searched = 'fax';
            }
            // Also try to apply checks for text
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['text'])) {
                $IS_FOUND = $this->_search_item($where_search, $CUR_CHECKS['text']);
                $_where_searched = 'text';
            }
            // Complex search
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['phone'])) {
                $IS_FOUND = $this->_complex_phone_search($where_search, $CUR_CHECKS['phone']);
                $_where_searched = 'phone';
            }
            // Complex search
            if ( ! $IS_FOUND && strlen($CUR_CHECKS['fax'])) {
                $IS_FOUND = $this->_complex_phone_search($where_search, $CUR_CHECKS['fax']);
                $_where_searched = 'fax';
            }
        }
        // Prepare default message what was found
        if ($IS_FOUND) {
            $WHAT_FOUND = '(reason_id:' . $CUR_CHECKS['id'] . '), ' . ( ! empty($_where_searched) ? ' checked_field:' . $_where_searched . ', ' : '') . $input_name . '=' . (strlen($where_search) > 32 ? substr($where_search, 0, 32) . '...' : $where_search);
        }
        return $WHAT_FOUND;
    }