Switch to recommended zlib-output_compression

- http://php.net/manual/en/function.ob-gzhandler.php#refsect1-function.ob-gzhandler-notes

Author: Svish

proxy.php

@@ -84,8 +84,8 @@
 // Remove any existing headers
 header_remove();
 
-// Use gz, if acceptable
-ob_start('ob_gzhandler');
+// Use zlib, if acceptable
+ini_set('zlib.output_compression', $zlib ?? 'On');
 
 // Output headers
 $header = substr($out, 0, $info['header_size']);

test/echo.php

@@ -9,11 +9,11 @@
 ];
 
 header_remove();
-ob_start('ob_gzhandler');
+ini_set('zlib.output_compression', 'On');
 header('Content-Type: application/json; charset=utf-8');
 header('X-Test-Header: This header should come back through');
 setcookie('Test-Cookie', uniqid());
 session_name('Test-Session');
 session_start();
 
-echo json_encode($info, JSON_PRETTY_PRINT | JSON_NUMERIC_CHECK | JSON_FORCE_OBJECT);
+echo json_encode(array_filter($info), JSON_PRETTY_PRINT | JSON_NUMERIC_CHECK | JSON_FORCE_OBJECT);