Fragen\GitHub_Updater\Theme::single_install_switcher PHP Метод

    protected function single_install_switcher($theme)
    {
        $show_button = true;
        $options = get_site_option('github_updater');
        $nonced_update_url = wp_nonce_url($this->get_update_url('theme', 'upgrade-theme', $theme->repo), 'upgrade-theme_' . $theme->repo);
        $rollback_url = sprintf('%s%s', $nonced_update_url, '&rollback=');
        ob_start();
        if (!empty($options['branch_switch'])) {
            printf('<p>' . esc_html__('Current branch is `%1$s`, try %2$sanother version%3$s', 'github-updater'), $theme->branch, '<a href="#" onclick="jQuery(\'#ghu_versions\').toggle();return false;">', '</a>.</p>');
            ?>
			<div id="ghu_versions" style="display:none; width: 100%;">
				<label><select style="width: 60%;"
				               onchange="if(jQuery(this).val() != '') {
					               jQuery(this).parent().next().show();
					               jQuery(this).parent().next().attr('href','<?php 
            echo esc_url($rollback_url);
            ?>
'+jQuery(this).val());
					               }
					               else jQuery(this).parent().next().hide();
					               ">
						<option value=""><?php 
            esc_html_e('Choose a Version', 'github-updater');
            ?>
&#8230;</option>
						<?php 
            foreach (array_keys($theme->branches) as $branch) {
                echo '<option>' . $branch . '</option>';
            }
            if (!empty($theme->rollback)) {
                $rollback = array_keys($theme->rollback);
                usort($rollback, 'version_compare');
                krsort($rollback);
                $rollback = array_splice($rollback, 0, 4, true);
                array_shift($rollback);
                // Dump current tag.
                foreach ($rollback as $tag) {
                    echo '<option>' . $tag . '</option>';
                }
            }
            if (empty($options['branch_switch']) && empty($theme->rollback)) {
                echo '<option>' . esc_html__('No previous tags to rollback to.', 'github-updater') . '</option></select></label>';
                $show_button = false;
            }
            ?>
					</select></label>
				<?php 
            if ($show_button) {
                ?>
					<a style="display: none;" class="button-primary" href="?"><?php 
                esc_html_e('Install', 'github-updater');
                ?>
</a>
				<?php 
            }
            ?>
			</div>
			<?php 
        }
        return trim(ob_get_clean(), '1');
    }