protected function createNCX( $book_contents, $metadata ) {

		if ( empty( $this->manifest ) ) {
			throw new \Exception( '$this->manifest cannot be empty. Did you forget to call $this->createOEBPS() ?' );
		}

		// Sanitize variables for usage in XML template
		$vars = [
			'author' => ! \Pressbooks\Utility\empty_space( $metadata['pb_authors'] ) ? sanitize_xml_attribute( oxford_comma_explode( $metadata['pb_authors'] )[0] ) : '',
			'manifest' => $this->manifest,
			'dtd_uid' => ! empty( $metadata['pb_ebook_isbn'] ) ? sanitize_xml_attribute( $metadata['pb_ebook_isbn'] ) : sanitize_xml_attribute( get_bloginfo( 'url' ) ),
			'enable_external_identifier' => false,
			'lang' => $this->lang,
		];

		\Pressbooks\Utility\put_contents(
			$this->tmpDir . '/toc.xhtml',
			$this->loadTemplate( $this->dir . '/templates/epub3/toc.php', $vars )
		);

		// For backwards compatibility
		\Pressbooks\Utility\put_contents(
			$this->tmpDir . '/toc.ncx',
			$this->loadTemplate( $this->dir . '/templates/epub201/ncx.php', $vars )
		);
	}
protected function createNCX( $book_contents, $metadata ) {

		if ( empty( $this->manifest ) ) {
			throw new \Exception( '$this->manifest cannot be empty. Did you forget to call $this->createOEBPS() ?' );
		}

		// Sanitize variables for usage in XML template
		$vars = [
			'author' => ! \Pressbooks\Utility\empty_space( $metadata['pb_authors'] ) ? sanitize_xml_attribute( oxford_comma_explode( $metadata['pb_authors'] )[0] ) : '',
			'manifest' => $this->manifest,
			'dtd_uid' => ! empty( $metadata['pb_ebook_isbn'] ) ? sanitize_xml_attribute( $metadata['pb_ebook_isbn'] ) : sanitize_xml_attribute( get_bloginfo( 'url' ) ),
			'enable_external_identifier' => false,
			'lang' => $this->lang,
		];

		\Pressbooks\Utility\put_contents(
			$this->tmpDir . '/toc.xhtml',
			$this->loadTemplate( $this->dir . '/templates/epub3/toc.php', $vars )
		);

		// For backwards compatibility
		\Pressbooks\Utility\put_contents(
			$this->tmpDir . '/toc.ncx',
			$this->loadTemplate( $this->dir . '/templates/epub201/ncx.php', $vars )
		);
	}
protected function createNCX ( $ book_contents , $ metadata ) { if ( empty ( $ this -> manifest ) ) { throw new \ Exception ( '$this->manifest cannot be empty. Did you forget to call $this->createOEBPS() ?' ) ; } // Sanitize variables for usage in XML template $ vars = [ 'author' => ! \ Pressbooks \ Utility \ empty_space ( $ metadata [ 'pb_authors' ] ) ? sanitize_xml_attribute ( oxford_comma_explode ( $ metadata [ 'pb_authors' ] ) [ 0 ] ) : '' , 'manifest' => $ this -> manifest , 'dtd_uid' => ! empty ( $ metadata [ 'pb_ebook_isbn' ] ) ? sanitize_xml_attribute ( $ metadata [ 'pb_ebook_isbn' ] ) : sanitize_xml_attribute ( get_bloginfo ( 'url' ) ) , 'enable_external_identifier' => false , 'lang' => $ this -> lang , ] ; \ Pressbooks \ Utility \ put_contents ( $ this -> tmpDir . '/toc.xhtml' , $ this -> loadTemplate ( $ this -> dir . '/templates/epub3/toc.php' , $ vars ) ) ; // For backwards compatibility \ Pressbooks \ Utility \ put_contents ( $ this -> tmpDir . '/toc.ncx' , $ this -> loadTemplate ( $ this -> dir . '/templates/epub201/ncx.php' , $ vars ) ) ; }
Create NCX file.

@param array $book_contents
@param array $metadata

@throws \Exception
Create NCX file .