File_Upload_Upgrader::__construct( string $form, string $urlholder )

54	public function __construct( $form, $urlholder ) {55 56		if ( empty( $_FILES[ $form ]['name'] ) && empty( $_GET[ $urlholder ] ) ) {57			wp_die( __( 'Please select a file' ) );58		}59 60		// Handle a newly uploaded file. Else, assume it's already been uploaded.61		if ( ! empty( $_FILES ) ) {62			$overrides = array(63				'test_form' => false,64				'test_type' => false,65			);66			$file      = wp_handle_upload( $_FILES[ $form ], $overrides );67 68			if ( isset( $file['error'] ) ) {69				wp_die( $file['error'] );70			}71 72			if ( 'pluginzip' === $form || 'themezip' === $form ) {73				if ( ! wp_zip_file_is_valid( $file['file'] ) ) {74					wp_delete_file( $file['file'] );75 76					if ( 'pluginzip' === $form ) {77						$plugins_page = sprintf(78							'<a href="%s">%s</a>',79							self_admin_url( 'plugin-install.php' ),80							__( 'Return to the Plugin Installer' )81						);82						wp_die( __( 'Incompatible Archive.' ) . '<br />' . $plugins_page );83					}84 85					if ( 'themezip' === $form ) {86						$themes_page = sprintf(87							'<a href="%s" target="_parent">%s</a>',88							self_admin_url( 'theme-install.php' ),89							__( 'Return to the Theme Installer' )90						);91						wp_die( __( 'Incompatible Archive.' ) . '<br />' . $themes_page );92					}93				}94			}95 96			$this->filename = $_FILES[ $form ]['name'];97			$this->package  = $file['file'];98 99			// Construct the attachment array.100			$attachment = array(101				'post_title'     => $this->filename,102				'post_content'   => $file['url'],103				'post_mime_type' => $file['type'],104				'guid'           => $file['url'],105				'context'        => 'upgrader',106				'post_status'    => 'private',107			);108 109			// Save the data.110			$this->id = wp_insert_attachment( $attachment, $file['file'] );111 112			// Schedule a cleanup for 2 hours from now in case of failed installation.113			wp_schedule_single_event( time() + 2 * HOUR_IN_SECONDS, 'upgrader_scheduled_cleanup', array( $this->id ) );114 115		} elseif ( is_numeric( $_GET[ $urlholder ] ) ) {116			// Numeric Package = previously uploaded file, see above.117			$this->id   = (int) $_GET[ $urlholder ];118			$attachment = get_post( $this->id );119			if ( empty( $attachment ) ) {120				wp_die( __( 'Please select a file' ) );121			}122 123			$this->filename = $attachment->post_title;124			$this->package  = get_attached_file( $attachment->ID );125		} else {126			// Else, It's set to something, Back compat for plugins using the old (pre-3.3) File_Uploader handler.127			$uploads = wp_upload_dir();128			if ( ! ( $uploads && false === $uploads['error'] ) ) {129				wp_die( $uploads['error'] );130			}131 132			$this->filename = sanitize_file_name( $_GET[ $urlholder ] );133			$this->package  = $uploads['basedir'] . '/' . $this->filename;