PHP AIOWPSecurity_Utility::generate_alpha_random_string方法代码示例

    function render_tab1()
    {
        global $wpdb, $aio_wp_security;
        $old_db_prefix = $wpdb->prefix;
        $new_db_prefix = '';
        $perform_db_change = false;
        if (isset($_POST['aiowps_db_prefix_change'])) {
            $nonce = $_REQUEST['_wpnonce'];
            if (!wp_verify_nonce($nonce, 'aiowpsec-db-prefix-change-nonce')) {
                $aio_wp_security->debug_logger->log_debug("Nonce check failed for DB prefix change operation!", 4);
                die(__('Nonce check failed for DB prefix change operation!', 'all-in-one-wp-security-and-firewall'));
            }
            //Let's first check if user's system allows writing to wp-config.php file. If plugin cannot write to wp-config we will not do the prefix change.
            $config_file = AIOWPSecurity_Utility_File::get_wp_config_file_path();
            $file_write = AIOWPSecurity_Utility_File::is_file_writable($config_file);
            if (!$file_write) {
                $this->show_msg_error(__('The plugin has detected that it cannot write to the wp-config.php file. This feature can only be used if the plugin can successfully write to the wp-config.php file.', 'all-in-one-wp-security-and-firewall'));
            } else {
                if (isset($_POST['aiowps_enable_random_prefix'])) {
                    //User has elected to generate a random DB prefix
                    $string = AIOWPSecurity_Utility::generate_alpha_random_string('5');
                    $new_db_prefix = $string . '_';
                    $perform_db_change = true;
                } else {
                    if (empty($_POST['aiowps_new_manual_db_prefix'])) {
                        $this->show_msg_error(__('Please enter a value for the DB prefix.', 'all-in-one-wp-security-and-firewall'));
                    } else {
                        //User has chosen their own DB prefix value
                        $new_db_prefix = wp_strip_all_tags(trim($_POST['aiowps_new_manual_db_prefix']));
                        $error = $wpdb->set_prefix($new_db_prefix);
                        if (is_wp_error($error)) {
                            wp_die(__('<strong>ERROR</strong>: The table prefix can only contain numbers, letters, and underscores.', 'all-in-one-wp-security-and-firewall'));
                        }
                        $perform_db_change = true;
                    }
                }
            }
        }
        ?>

        <h2><?php 
        _e('Change Database Prefix', 'all-in-one-wp-security-and-firewall');
        ?>
</h2>
        <div class="aio_blue_box">
            <?php 
        echo '<p>' . __('Your WordPress DB is the most important asset of your website because it contains a lot of your site\'s precious information.', 'all-in-one-wp-security-and-firewall') . '
            <br />' . __('The DB is also a target for hackers via methods such as SQL injections and malicious and automated code which targets certain tables.', 'all-in-one-wp-security-and-firewall') . '
            <br />' . __('One way to add a layer of protection for your DB is to change the default WordPress table prefix from "wp_" to something else which will be difficult for hackers to guess.', 'all-in-one-wp-security-and-firewall') . '
            <br />' . __('This feature allows you to easily change the prefix to a value of your choice or to a random value set by this plugin.', 'all-in-one-wp-security-and-firewall') . '
            </p>';
        ?>

        </div>

        <div class="postbox">
        <h3 class="hndle"><label for="title"><?php 
        _e('DB Prefix Options', 'all-in-one-wp-security-and-firewall');
        ?>
</label></h3>
        <div class="inside">
        <?php 
        //Display security info badge
        global $aiowps_feature_mgr;
        $aiowps_feature_mgr->output_feature_details_badge("db-security-db-prefix");
        ?>


        <div class="aio_yellow_box">
            <?php 
        $backup_tab_link = '<a href="admin.php?page=' . AIOWPSEC_DB_SEC_MENU_SLUG . '&tab=tab2">DB Backup</a>';
        $info_msg = '<p>' . sprintf(__('It is recommended that you perform a %s before using this feature', 'all-in-one-wp-security-and-firewall'), $backup_tab_link) . '</p>';
        echo $info_msg;
        ?>

        </div>

        <form action="" method="POST">
        <?php 
        wp_nonce_field('aiowpsec-db-prefix-change-nonce');
        ?>

        <table class="form-table">
            <tr valign="top">
                <th scope="row"><?php 
        _e('Current DB Table Prefix', 'all-in-one-wp-security-and-firewall');
        ?>
:</th>
                <td>
                    <span class="aiowpsec_field_value"><strong><?php 
        echo $wpdb->prefix;
        ?>
</strong></span>
                    <?php 
        //now let's display a warning notification if default prefix is used
        if ($old_db_prefix == 'wp_') {
            echo '&nbsp;&nbsp;&nbsp;<span class="aio_error_with_icon">' . __('Your site is currently using the default WordPress DB prefix value of "wp_". 
                            To increase your site\'s security you should consider changing the DB prefix value to another value.', 'all-in-one-wp-security-and-firewall') . '</span>';
        }
        ?>
//.........这里部分代码省略.........