Check Website Commpressed gzip/deflate using PHP cURL

 

HTTP Compression Tester 

lets you verify that web content is being compressed 

using gzip / deflate

Code:

	<?php
	function gzip_tester($url)
	{
	$result = array(
	'url' => $url,
	'compressed' => '-',
	'compressed_type' => '-',
	'uncompressed_size' => '-',
	'compressed_size' => '-',
	'percentage' => '-'
	);
	$original = get_header($url);
	$compress = get_header($url, true);
	if (count($original) > 1)
	{
	$result['compressed'] = 'no';
	$result['uncompressed_size'] = $original['size_download'] . ' bytes';
	$header = get_headers_response($compress);
	if (count($header) > 1)
	{
	$compression = $header["content-encoding"];
	$size = $header["content-length"];
	if ($compression != "" && $size != "")
	{
	$result['compressed'] = "yes";
	$result['compressed_type'] = $compression;
	$result['compressed_size'] = $size . ' bytes';
	$result['percentage'] = number_format(($original['size_download'] - $size) / $original['size_download'] * 100, 1) . ' %';
	}
	}
	}
	return $result;
	}
	function get_header($url, $com = false)
	{
	$info = array();
	$c = curl_init($url);
	if ($com)
	{
	curl_setopt($c, CURLOPT_ENCODING, "gzip,deflate");
	}
	curl_setopt($c, CURLOPT_HEADER, true);
	curl_setopt($c, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0');
	curl_setopt($c, CURLOPT_SSL_VERIFYHOST, 0);
	curl_setopt($c, CURLOPT_SSL_VERIFYPEER, 0);
	curl_setopt($c, CURLOPT_FOLLOWLOCATION, true);
	curl_setopt($c, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($c, CURLOPT_REFERER, $url);
	if (!curl_error($c))
	{
	if ($com)
	{
	$info = curl_exec($c);
	}
	else
	{
	curl_exec($c);
	$info = curl_getinfo($c);
	}
	curl_close($c);
	}
	return $info;
	}
	function get_headers_response($response)
	{
	$headers = array();
	$header_text = substr($response, 0, strpos($response, "\r\n\r\n"));
	foreach (explode("\r\n", $header_text) as $i => $line) if ($i === 0) $headers['http_code'] = $line;
	else
	{
	list($key, $value) = explode(': ', $line);
	$headers[$key] = $value;
	}
	return $headers;
	}
	echo "<pre>";
	print_r(gzip_tester("http://yourwebsite.com/"));
	echo "</pre>";
	?>

view raw compress_tester.php hosted with ❤ by GitHub

Output:

Array
(
    [url] => http://yourwebsite.com/
    [compressed] => yes
    [compressed_type] => gzip
    [uncompressed_size] => 8517 bytes
    [compressed_size] => 2738 bytes
    [percentage] => 67.9 %
)