gzwrite - PHP code example

Using the PHP Function gzwrite

PHP has over 1000 built-in functions that you can call directly from your code to perform specific tasks. A function is a set of statements that can be repeated throughout your program and accepts input in the form of arguments, processes it and returns a value. The code for a PHP function must be inside parenthesis. A name for a function must start with a letter or an underscore and ends with an open and closed parenthesis.

gzwrite is a php function that will read a gzip compressed file and write its contents to a file in uncompressed format. The file that needs to be read can be specified as an argument, or you can use a variable to store the contents that will be written. The gzwrite() function also provides a way to stop writing after a certain number of bytes have been written or if the file has not been read successfully.

Another handy PHP function is stream_copy_to_stream(). This is a great function for extracting gzip files. It works in a similar way to fwrite and gzread, but it is much more memory efficient. The only downside to it is that it tends to output a lot of extra junk, such as the line endings of the file being copied over. This could cause problems in some browsers (particularly IE6).

There are many benefits of using PHP functions in your code. It allows you to reuse the same code multiple times, and makes your application easier to understand as the logic is separated into different functions. You can practice php function calls in our online coding section up top.

gzwrite example

        return true;
    }

    /** * @param resource $fileHandler * @param string $content */
    private function write($fileHandler, $content)
    {
        gzwrite($fileHandler, $content);
    }

    /** * Makes sure all files get closed and replaces the old sitemaps with the freshly generated ones */
    private function moveFiles()
    {
        /** @var Sitemap[] $sitemaps */
        foreach ($this->sitemaps as $shopId => $sitemaps) {
            // Delete old sitemaps for this siteId             foreach ($this->filesystem->listContents(sprintf('shop-%d', $shopId)) as $file) {

$v_buffer = @gzread($p_src, $v_read_size);
        @fwrite($p_dest, $v_buffer, $v_read_size);
        $p_size -= $v_read_size;
      }
    }
    else if ($p_mode==2)
    {
      while ($p_size != 0)
      {
        $v_read_size = ($p_size < PCLZIP_READ_BLOCK_SIZE ? $p_size : PCLZIP_READ_BLOCK_SIZE);
        $v_buffer = @fread($p_src, $v_read_size);
        @gzwrite($p_dest, $v_buffer, $v_read_size);
        $p_size -= $v_read_size;
      }
    }
    else if ($p_mode==3)
    {
      while ($p_size != 0)
      {
        $v_read_size = ($p_size < PCLZIP_READ_BLOCK_SIZE ? $p_size : PCLZIP_READ_BLOCK_SIZE);
        $v_buffer = @gzread($p_src, $v_read_size);
        @gzwrite($p_dest, $v_buffer, $v_read_size);
        $p_size -= $v_read_size;
      }

$this->printHeader();

        $this->tmpFiles[] = $filePath;
    }

    /** * @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;
            }
        }