<?php

# Check Windows operating system
function is_windows ( ) {
   return ( substr_count( php_uname( 's' ), 'Windows' ) ? true : false ) ;
};

// Load VersyPDF extension
if (!extension_loaded('VersyPDF')) {
   if ( is_windows() ) {
       dl('php_versypdf.dll');
   } else {
       dl('versypdf.so');
   }
}

// Initialise PDF Library with empty License name and key ( demo mode )
$Lib = pdf_library_init( "", "" );

// Launch destination PDF file after work if Windows Presents
if ( is_windows() ) {
	 $InputFile = getcwd().'\in\pdf\island.pdf';
     $OutputFile = getcwd().'\out\other\metadata.out';
} else {
	 $InputFile = 'in/pdf/island.pdf';
     $OutputFile = 'out/other/metadata.out';
}

$Doc = pdfdoc_load_from_file( $Lib, $InputFile );

		$Root = pdfdoc_get_root( $Doc );
		$Meta = cosdict_value_by_name( $Root, ul_atom_from_string( $Lib, 'Metadata' ) );

        /* Check if "Metadata" stream object exists */
		if ( cos_get_type( $Meta ) != COS_NULL ) {
			$MetaAttr = cosstream_get_attr( $Meta );
			$MetaStream = cosstream_get_value( $Meta );
			if ( $MetaStream ) {
				$OutStream = ul_stream_file_new( $Lib, $OutputFile, $$$PP_FILE_WRITEMODE );
				ul_stream_copy_to_stream( $MetaStream, $OutStream );
				ul_stream_close( $OutStream );
                print "Success...\n";
			}
		} else {
            print "No metadata...\n";
        }
// Save destination pdf file as "draw_figures.pdf"
pdfdoc_close( $Doc );

// Free PDF Library
pdf_library_done( $Lib );

?>