php开启zip压缩

一般大家是通过web服务器来开启的zip压缩。

现在通过php实现这样的压缩

// Gzip encode the contents of the output buffer.
function compress_output_option($output)
{
    // Compress the data into a new var.
    $compressed_out = gzencode($output);

    // Don't compress any pages less than 1000 bytes
    // as it's not worth the overhead at either side.
    if(strlen($output) >= 1000)
    {
        header("Content-Encoding: gzip");
        return $compressed_out;
    }
    else
    {
        return $output;
    }
}

// Check if the browser supports gzip encoding, HTTP_ACCEPT_ENCODING
if (strstr($HTTP_SERVER_VARS['HTTP_ACCEPT_ENCODING'], 'gzip'))
{
    // Start output buffering, and register compress_output() (see
    // below)
    ob_start("compress_output_option");

}

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