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

Source

public function __construct( $form, $urlholder ) {

	if ( empty( $_FILES[ $form ]['name'] ) && empty( $_GET[ $urlholder ] ) ) {
		wp_die( __( 'Please select a file' ) );
	}

	// Handle a newly uploaded file. Else, assume it's already been uploaded.
	if ( ! empty( $_FILES ) ) {
		$overrides = array(
			'test_form' => false,
			'test_type' => false,
		);
		$file      = wp_handle_upload( $_FILES[ $form ], $overrides );

		if ( isset( $file['error'] ) ) {
			wp_die( $file['error'] );
		}

		if ( 'pluginzip' === $form || 'themezip' === $form ) {
			if ( ! wp_zip_file_is_valid( $file['file'] ) ) {
				wp_delete_file( $file['file'] );
				wp_die( __( 'Incompatible Archive.' ) );
			}
		}

		$this->filename = $_FILES[ $form ]['name'];
		$this->package  = $file['file'];

		// Construct the attachment array.
		$attachment = array(
			'post_title'     => $this->filename,
			'post_content'   => $file['url'],
			'post_mime_type' => $file['type'],
			'guid'           => $file['url'],
			'context'        => 'upgrader',
			'post_status'    => 'private',
		);

		// Save the data.
		$this->id = wp_insert_attachment( $attachment, $file['file'] );

		// Schedule a cleanup for 2 hours from now in case of failed installation.
		wp_schedule_single_event( time() + 2 * HOUR_IN_SECONDS, 'upgrader_scheduled_cleanup', array( $this->id ) );

	} elseif ( is_numeric( $_GET[ $urlholder ] ) ) {
		// Numeric Package = previously uploaded file, see above.
		$this->id   = (int) $_GET[ $urlholder ];
		$attachment = get_post( $this->id );
		if ( empty( $attachment ) ) {
			wp_die( __( 'Please select a file' ) );
		}

		$this->filename = $attachment->post_title;
		$this->package  = get_attached_file( $attachment->ID );
	} else {
		// Else, It's set to something, Back compat for plugins using the old (pre-3.3) File_Uploader handler.
		$uploads = wp_upload_dir();
		if ( ! ( $uploads && false === $uploads['error'] ) ) {
			wp_die( $uploads['error'] );
		}

		$this->filename = sanitize_file_name( $_GET[ $urlholder ] );
		$this->package  = $uploads['basedir'] . '/' . $this->filename;

		if ( ! str_starts_with( realpath( $this->package ), realpath( $uploads['basedir'] ) ) ) {
			wp_die( __( 'Please select a file' ) );
		}
	}
}

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