php 我创建的缩小php脚本，以最大限度地提高Googles页面速度得分
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<?php
header('Content-Type: text/html; charset=utf-8');
function getAjax($url = false) {
if($url) {
$ch = curl_init();
$timeout = 5;
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
}
function sanitizeOutput($buffer)
{
$search = array(
'/\>[^\S ]+/s', //strip whitespaces after tags, except space
'/[^\S ]+\</s', //strip whitespaces before tags, except space
'/(\s)+/s', // shorten multiple whitespace sequences
'/(?!<\")\/\*[^\*]+\*\/(?!\")/'
);
$replace = array(
'>',
'<',
'\\1',
' '
);
$buffer = preg_replace($search, $replace, $buffer);
return $buffer;
}
$cached = (filemtime('minify/lastcached.txt') < (time() - 3600)
&& file_exists('minify/min.js')
&& file_exists('minify/min.zip.css')) ? true : false;
if($cached) {
// JS
$js = '';
$js = getAjax('http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js?ver=3.4.2');
$js .= getAjax('http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/js/bootstrap.min.js');
$js .= file_get_contents('js/init.js');
$regex = array(
"`^([\t\s]+)`ism"=>'',
"`^\/\*(.+?)\*\/`ism"=>"",
"`([\n\A;]+)\/\*(.+?)\*\/`ism"=>"$1",
"`([\n\A;\s]+)//(.+?)[\n\r]`ism"=>"$1\n",
"`(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+`ism"=>"\n",
"/\/\/(.*)[\r\n]/"=>""
);
$js = preg_replace( '#\s+#', ' ', $js );
$js = preg_replace( '#/\*.*?\*/#s', '', $js );
$js = str_replace( '; ', ';', $js );
$js = str_replace( ': ', ':', $js );
$js = str_replace( ' {', '{', $js );
$js = str_replace( '{ ', '{', $js );
$js = str_replace( ', ', ',', $js );
$js = str_replace( '} ', '}', $js );
$js = str_replace( ';}', '}', $js );
$js = preg_replace(array_keys($regex),$regex,$js);
//deferred loading cant handle gzip (or can it?)
file_put_contents('minify/min.js', $js);
// CSS
$css = getAjax('http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css');
$css = preg_replace( '#\s+#', ' ', $css );
$css = preg_replace( '#/\*.*?\*/#s', '', $css );
$css = str_replace( '; ', ';', $css );
$css = str_replace( ': ', ':', $css );
$css = str_replace( ' {', '{', $css );
$css = str_replace( '{ ', '{', $css );
$css = str_replace( ', ', ',', $css );
$css = str_replace( '} ', '}', $css );
$css = str_replace( ';}', '}', $css );
$css = preg_replace(array_keys($regex),$regex,$css);
$css = gzcompress($css, 9);
file_put_contents('minify/min.zip.css', $css);
file_put_contents('minify/lastcached.txt', time());
$cached = 'cache generated';
} else {
$cached = 'cached';
}
$new_css = file_get_contents('minify/min.zip.css');
$new_css = gzuncompress($new_css);
ob_start("sanitizeOutput");
?><html lang="en">
<head>
<style type="text/css"><?php echo $new_css ?>.container{width:960px;margin:40px auto}pre{white-space:pre-wrap;word-break:break-all}</style>
</head>
<body>
<div class="container">
<pre>
<?php echo $cached; ?>
</pre>
</div>
</body>
</html>
<script type="text/javascript">
function downloadJSAtOnload() {
var element = document.createElement("script");
element.src = "minify/min.js";
document.body.appendChild(element);
}
function initGAAtOnload() {
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-18492577-2']);
_gaq.push(['_trackPageview']);
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
}
if (window.addEventListener)
window.addEventListener("load", downloadJSAtOnload, false);
else if (window.attachEvent)
window.attachEvent("onload", downloadJSAtOnload);
else {
window.onload = downloadJSAtOnload;
window.onload = initGAAtOnload;
}
</script>
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