<?php 
function docx_to_html($docx, $html_dir) {
    // Ensure the LANG environment variable is set
    putenv('LANG=ru_RU.UTF-8');
    
    // Ensure the output directory exists
    if (!is_dir($html_dir)) {
        mkdir($html_dir, 0777, true);
    }
    
    // Construct the command
    $command = "libreoffice --headless --convert-to html --outdir " . escapeshellarg($html_dir) . " " . escapeshellarg($docx);
    // Execute the command
    $output = shell_exec($command);
    $output = extract_between_markers_docx($output);

    update_src_paths($output, $html_dir);
    
    return $output;
}

function extract_between_markers_docx($input_str) {
    // Define the regular expression pattern to match the content between the markers
    $pattern = '/->\s*(.*?)\s*using filter : HTML \(StarWriter\)/';

    // Perform the regex match
    if (preg_match($pattern, $input_str, $matches)) {
        // Return the matched content
        return $matches[1];
    }

    // Return null if no match is found
    return null;
}

?>