php压缩html(清除换行符,清除制表符,去掉注释标记)

<?php
/**
* 压缩html : 清除换行符,清除制表符,去掉注释标记
* @param $string
* @return 压缩后的$string
* */
function compress_html($string) {
$string = str_replace("rn", '', $string); //清除换行符
$string = str_replace("n", '', $string); //清除换行符
$string = str_replace("t", '', $string); //清除制表符
$pattern = array (
"/> *([^ ]*) *</", //去掉注释标记
"/[s]+/",
"/<!--[^!]*-->/",
"/" /",
"/ "/",
"'/*[^*]**/'"
);
$replace = array (
">1<",
" ",
"",
""",
""",
""
);
return preg_replace($pattern, $replace, $string);
}