48 lines
1.3 KiB
PHP
Executable File
48 lines
1.3 KiB
PHP
Executable File
<?php
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/**
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* gzip_compression functions
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*
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* @package functions
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* @copyright Copyright 2003-2005 Zen Cart Development Team
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* @copyright Portions Copyright 2003 osCommerce
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* @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
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* @version $Id: gzip_compression.php 2618 2005-12-20 00:35:47Z drbyte $
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*/
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function zen_check_gzip() {
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global $HTTP_ACCEPT_ENCODING;
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if (headers_sent() || connection_aborted()) {
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return false;
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}
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if (strpos($HTTP_ACCEPT_ENCODING, 'x-gzip') !== false) return 'x-gzip';
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if (strpos($HTTP_ACCEPT_ENCODING,'gzip') !== false) return 'gzip';
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return false;
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}
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/* $level = compression level 0-9, 0=none, 9=max */
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function zen_gzip_output($level = GZIP_LEVEL) {
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if ($encoding = zen_check_gzip()) {
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$contents = ob_get_contents();
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ob_end_clean();
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header('Content-Encoding: ' . $encoding);
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$size = strlen($contents);
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$crc = crc32($contents);
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$contents = gzcompress($contents, $level);
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$contents = substr($contents, 0, strlen($contents) - 4);
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echo "\x1f\x8b\x08\x00\x00\x00\x00\x00";
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echo $contents;
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echo pack('V', $crc);
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echo pack('V', $size);
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} else {
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ob_end_flush();
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}
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}
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?>
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