WordPress at a glance
function is not described

delete_theme() WP 2.8.0

Remove a theme

  • Global. WP_Filesystem_Base. $wp_filesystem Subclass

No Hooks.

Return

null/true/false/WP_Error. When void, echoes content.

Usage

delete_theme( $stylesheet, $redirect );
$stylesheet(string) (required)
Stylesheet of the theme to delete
$redirect(string)
Redirect to page when complete.
Default: ''

Code of delete theme: wp-admin/includes/theme.php VER 5.0.3

<?php
function delete_theme($stylesheet, $redirect = '') {
	global $wp_filesystem;

	if ( empty($stylesheet) )
		return false;

	if ( empty( $redirect ) ) {
		$redirect = wp_nonce_url('themes.php?action=delete&stylesheet=' . urlencode( $stylesheet ), 'delete-theme_' . $stylesheet);
	}

	ob_start();
	$credentials = request_filesystem_credentials( $redirect );
	$data = ob_get_clean();

	if ( false === $credentials ) {
		if ( ! empty( $data ) ){
			include_once( ABSPATH . 'wp-admin/admin-header.php');
			echo $data;
			include( ABSPATH . 'wp-admin/admin-footer.php');
			exit;
		}
		return;
	}

	if ( ! WP_Filesystem( $credentials ) ) {
		ob_start();
		request_filesystem_credentials( $redirect, '', true ); // Failed to connect, Error and request again.
		$data = ob_get_clean();

		if ( ! empty($data) ) {
			include_once( ABSPATH . 'wp-admin/admin-header.php');
			echo $data;
			include( ABSPATH . 'wp-admin/admin-footer.php');
			exit;
		}
		return;
	}

	if ( ! is_object($wp_filesystem) )
		return new WP_Error('fs_unavailable', __('Could not access filesystem.'));

	if ( is_wp_error($wp_filesystem->errors) && $wp_filesystem->errors->get_error_code() )
		return new WP_Error('fs_error', __('Filesystem error.'), $wp_filesystem->errors);

	// Get the base plugin folder.
	$themes_dir = $wp_filesystem->wp_themes_dir();
	if ( empty( $themes_dir ) ) {
		return new WP_Error( 'fs_no_themes_dir', __( 'Unable to locate WordPress theme directory.' ) );
	}

	$themes_dir = trailingslashit( $themes_dir );
	$theme_dir = trailingslashit( $themes_dir . $stylesheet );
	$deleted = $wp_filesystem->delete( $theme_dir, true );

	if ( ! $deleted ) {
		return new WP_Error( 'could_not_remove_theme', sprintf( __( 'Could not fully remove the theme %s.' ), $stylesheet ) );
	}

	$theme_translations = wp_get_installed_translations( 'themes' );

	// Remove language files, silently.
	if ( ! empty( $theme_translations[ $stylesheet ] ) ) {
		$translations = $theme_translations[ $stylesheet ];

		foreach ( $translations as $translation => $data ) {
			$wp_filesystem->delete( WP_LANG_DIR . '/themes/' . $stylesheet . '-' . $translation . '.po' );
			$wp_filesystem->delete( WP_LANG_DIR . '/themes/' . $stylesheet . '-' . $translation . '.mo' );
		}
	}

	// Remove the theme from allowed themes on the network.
	if ( is_multisite() ) {
		WP_Theme::network_disable_theme( $stylesheet );
	}

	// Force refresh of theme update information.
	delete_site_transient( 'update_themes' );

	return true;
}