Month: May 2015

function sync_files( $remote, $local )
{
    if ( ! is_file( $local ) ) { return copy( $remote, $local ); }

    $handle = fopen( $remote, 'r' );
    if ( ! $handle ) { die( "Could not open {$remote}." ); }
    $meta = stream_get_meta_data( $handle );
    fclose( $handle );

    foreach( $meta['wrapper_data'] as $response )
    {
        // Redirection
        if ( substr( strtolower( $response ), 0, 10 ) === 'location: ' ) {
            return sync_files( substr( $response, 10 ), $local );
        }

        // Compare sizes
        if ( substr( strtolower( $response ), 0, 16 ) === 'content-length: ' )
        {
            if ( (int) filesize( $local ) !== (int) substr( $response, 16 ) ) {
                return copy( $remote, $local );
            }
            continue;
        }

        // Compare dates
        if ( substr( strtolower( $response ), 0, 15 ) === 'last-modified: ' )
        {
            if ( (int) filemtime( $local ) < (int) strtotime( substr( $response, 15 ) ) ) {
                return copy( $remote, $local );
            }
            continue;
        }
    }

    return false;
}

function remove_nodes( $html, array $selectors = array( '//comment()', '//script' ) )
{
    $dom = new DOMDocument;
    $dom->loadHtml( strval( $html ) );
    $dom->preserveWhiteSpace = false;
    $dom->formatOutput = true;
    $xpath = new DOMXPath( $dom );
    foreach( $selectors as $selector ) {
        while ( $node = $xpath->query( $selector )->item( 0 ) ) {
            // Remove selected tag from html string
            $node->parentNode->removeChild( $node );
        }
    }
    return $dom->saveHTML();
}