gzclose - PHP code example

A Detailed Description of the PHP Function Gzclose

PHP has many built-in functions that allow you to perform a specific task. However, it is also possible to create your own custom functions. Functions are a group of statements that can be called repeatedly throughout a program. Arguments are passed to functions through the return function statement. An argument is just like a variable, and it can be any data type. Arguments are specified after the function name, inside curly () braces. Arguments can be a single value or an array of values.

A common function in web programming is the gzclose(). This function closes a gzipped file that was created by a previous gzopen() function. The gzclose() function is very useful because it saves you the time of creating and opening the file. It is important to understand how a gzclose() function works before using it in production.

This article provides a detailed description of the php function gzclose and shows you how to use it in your code. It also provides a simple example of how to use it in your web application.

Using gzclose() in your code can help reduce the size of your web pages. This is especially important if your visitors are accessing the site from mobile devices. By using gzclose() you can prevent unnecessary data from being sent to mobile users.

The gzclose() function uses the zlib library by Jean-loup Gailly and Mark Adler to transparently read and write gzip (.gz) compressed files. It requires a zlib version >= 1.0.9.

gzclose example

    $v_size = filesize($p_filename);
    while ($v_size != 0) {
      $v_read_size = ($v_size < PCLZIP_READ_BLOCK_SIZE ? $v_size : PCLZIP_READ_BLOCK_SIZE);
      $v_buffer = @fread($v_file, $v_read_size);
      //$v_binary_data = pack('a'.$v_read_size, $v_buffer);       @gzputs($v_file_compressed, $v_buffer, $v_read_size);
      $v_size -= $v_read_size;
    }

    // ----- Close the file     @fclose($v_file);
    @gzclose($v_file_compressed);

    // ----- Check the minimum file size     if (filesize($v_gzip_temp_name) < 18) {
      PclZip::privErrorLog(PCLZIP_ERR_BAD_FORMAT, 'gzip temporary file \''.$v_gzip_temp_name.'\' has invalid filesize - should be minimum 18 bytes');
      return PclZip::errorCode();
    }

    // ----- Extract the compressed attributes     if (($v_file_compressed = @fopen($v_gzip_temp_name, "rb")) == 0) {
      PclZip::privErrorLog(PCLZIP_ERR_READ_OPEN_FAIL, 'Unable to open temporary file \''.$v_gzip_temp_name.'\' in binary read mode');
      return PclZip::errorCode();
    }

return true;
    }

    /** * @return bool */
    public function _close()
    {
        //if (isset($this->_file)) {         if (is_resource($this->_file)) {
            if ($this->_compress_type == 'gz') {
                @gzclose($this->_file);
            } else {
                if ($this->_compress_type == 'bz2') {
                    @bzclose($this->_file);
                } else {
                    if ($this->_compress_type == 'lzma2') {
                        @xzclose($this->_file);
                    } else {
                        if ($this->_compress_type == 'none') {
                            @fclose($this->_file);
                        } else {
                            $this->_error(

/** * @param Url[] $urls */
    public function write(array $urls): void
    {
        foreach ($urls as $url) {
            gzwrite($this->handle, (string) $url);
            ++$this->urlCount;

            if ($this->urlCount % self::MAX_URLS === 0) {
                $this->printFooter();
                gzclose($this->handle);
                ++$this->index;
                $path = $this->getTmpFilePath($this->context);
                $this->openGzip($path);
                $this->printHeader();
                $this->tmpFiles[] = $path;
            }
        }
    }

    public function finish(?bool $cleanUp = true): void
    {

    private function closeFile($shopId)
    {
        if (!\array_key_exists($shopId, $this->files)) {
            throw new UnknownFileException(sprintf('No open file "%s"', $shopId));
        }

        $fileHandle = $this->files[$shopId]['fileHandle'];
        $this->write($fileHandle, '</urlset>');

        gzclose($fileHandle);

        if (!\array_key_exists($shopId, $this->sitemaps)) {
            $this->sitemaps[$shopId] = [];
        }

        $this->sitemaps[$shopId][] = new Sitemap(
            $this->files[$shopId]['fileName'],
            $this->files[$shopId]['urlCount']
        );

        unset($this->files[$shopId]);