download plugin snippet

download plugin snippet

<?php
/**
 * Plugin Name: WP ZIP Downloader
 * Description: Download installed plugins and themes as ZIP files without ZipArchive.
 * Version: 1.0.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

function wzdl_download_zip( $source, $zip_name, $remove_path ) {
	require_once ABSPATH . 'wp-admin/includes/class-pclzip.php';

	if ( ! file_exists( $source ) ) {
		wp_die( 'Source not found.' );
	}

	$upload_dir = wp_upload_dir();
	$zip_path   = trailingslashit( $upload_dir['basedir'] ) . sanitize_file_name( $zip_name );

	$zip = new PclZip( $zip_path );

	$result = $zip->create(
		$source,
		PCLZIP_OPT_REMOVE_PATH,
		$remove_path
	);

	if ( ! $result ) {
		wp_die( 'ZIP creation failed: ' . esc_html( $zip->errorInfo( true ) ) );
	}

	header( 'Content-Type: application/zip' );
	header( 'Content-Disposition: attachment; filename="' . basename( $zip_path ) . '"' );
	header( 'Content-Length: ' . filesize( $zip_path ) );

	readfile( $zip_path );
	@unlink( $zip_path );
	exit;
}

/**
 * Plugin download links.
 */
add_filter( 'plugin_action_links', function ( $actions, $plugin_file ) {
	if ( ! current_user_can( 'manage_options' ) ) {
		return $actions;
	}

	$url = wp_nonce_url(
		admin_url( 'plugins.php?wzdl_download_plugin=' . rawurlencode( $plugin_file ) ),
		'wzdl_plugin_' . $plugin_file
	);

	$actions['download_zip'] = '<a href="' . esc_url( $url ) . '">Download ZIP</a>';

	return $actions;
}, 10, 2 );

/**
 * Theme download page.
 */
add_action( 'admin_menu', function () {
	add_theme_page(
		'Download Theme ZIP',
		'Download Theme ZIP',
		'manage_options',
		'wzdl-theme-download',
		function () {
			echo '<div class="wrap"><h1>Download Theme ZIP</h1><table class="widefat striped">';
			echo '<thead><tr><th>Theme</th><th>Action</th></tr></thead><tbody>';

			foreach ( wp_get_themes() as $slug => $theme ) {
				$url = wp_nonce_url(
					admin_url( 'themes.php?wzdl_download_theme=' . rawurlencode( $slug ) ),
					'wzdl_theme_' . $slug
				);

				echo '<tr>';
				echo '<td>' . esc_html( $theme->get( 'Name' ) ) . '</td>';
				echo '<td><a class="button button-primary" href="' . esc_url( $url ) . '">Download ZIP</a></td>';
				echo '</tr>';
			}

			echo '</tbody></table></div>';
		}
	);
});

/**
 * Handle downloads.
 */
add_action( 'admin_init', function () {

	if ( isset( $_GET['wzdl_download_plugin'] ) ) {
		$plugin_file = sanitize_text_field( wp_unslash( $_GET['wzdl_download_plugin'] ) );

		check_admin_referer( 'wzdl_plugin_' . $plugin_file );

		$plugin_dir = dirname( $plugin_file );

		if ( $plugin_dir !== '.' ) {
			$source = WP_PLUGIN_DIR . '/' . $plugin_dir;
			$name   = $plugin_dir . '.zip';
		} else {
			$source = WP_PLUGIN_DIR . '/' . basename( $plugin_file );
			$name   = basename( $plugin_file, '.php' ) . '.zip';
		}

		wzdl_download_zip( $source, $name, WP_PLUGIN_DIR );
	}

	if ( isset( $_GET['wzdl_download_theme'] ) ) {
		$theme_slug = sanitize_key( wp_unslash( $_GET['wzdl_download_theme'] ) );

		check_admin_referer( 'wzdl_theme_' . $theme_slug );

		$theme = wp_get_theme( $theme_slug );

		if ( ! $theme->exists() ) {
			wp_die( 'Theme not found.' );
		}

		wzdl_download_zip(
			$theme->get_stylesheet_directory(),
			$theme_slug . '.zip',
			get_theme_root()
		);
	}
});