Document

注意事项

只支持压缩含一个<script></script>的html,且变量内多个空格也会被压缩为一个

压缩内容

• html

去除<!-- -->内的全部内容

多个空白符变为一个空格

去除> <内的空白符

• css

去除/* */内的全部内容

多个空白符变为一个空格

去除【'】【"】【{】【}】【:】【;】【,】【<style>】【</style>】两端的空白符

• js

去除/* */内的全部内容

去除//行内容

多个空白符变为一个空格

去除【(】【)】【{】【}】【=】【||】【&&】【+】【'】【"】【:】【;】【,】【<script>】【</script>】两端的空白符

代码

<?php

function miniHtml($s)
{
    //注：只支持压缩含一个<script></script>的html,且变量内多个空格也会被压缩为一个

    //提取css跟javascript单独处理
    preg_match('/\<style\>[\s\S]*\<\/style\>/',$s,$style);
    preg_match('/\<script\>[\s\S]*\<\/script\>/',$s,$script);
    empty($style)?$style='':$style = $style[0];
    empty($script)?$script='':$script = $script[0];

    //处理html
    $html = preg_replace('/\<\!\-\-[\s\S]*\-\-\>/','',$s);
    $html = preg_replace('/[\s]+/',' ',$html);
    $html = preg_replace('/>[\s]+</','><',$html);

    //处理css
    $style = preg_replace('/\/\*[\s\S]*\*\//','',$style);
    $style = preg_replace('/[\s]+/',' ',$style);
    $style = preg_replace('/[\s]?\'[\s]?/','\'',$style);
    $style = preg_replace('/[\s]?"[\s]?/','"',$style);
    $style = preg_replace('/[\s]?\{[\s]?/','{',$style);
    $style = preg_replace('/[\s]?\}[\s]?/','}',$style);
    $style = preg_replace('/[\s]?\:[\s]?/',':',$style);
    $style = preg_replace('/[\s]?;[\s]?/',';',$style);
    $style = preg_replace('/[\s]?,[\s]?/',',',$style);
    $style = preg_replace('/[\s]?\<style\>[\s]?/','<style>',$style);
    $style = preg_replace('/[\s]?\<\/style\>[\s]?/','</style>',$style);

    //处理js

    $script = preg_replace('/\/\*[\s\S]*\*\//','',$script);
    $script = preg_replace('/^[\s]*\/\/.*$/m','',$script);
    $script = preg_replace('/[\s]+/',' ',$script);
    $script = preg_replace('/[\s]?\([\s]?/','(',$script);
    $script = preg_replace('/[\s]?\)[\s]?/',')',$script);
    $script = preg_replace('/[\s]?\{[\s]?/','{',$script);
    $script = preg_replace('/[\s]?\}[\s]?/','}',$script);
    $script = preg_replace('/[\s]?\=[\s]?/','=',$script);
    $script = preg_replace('/[\s]?\|\|[\s]?/','||',$script);
    $script = preg_replace('/[\s]?\&\&[\s]?/','&&',$script);
    $script = preg_replace('/[\s]?\+[\s]?/','+',$script);
    $script = preg_replace('/[\s]?\'[\s]?/','\'',$script);
    $script = preg_replace('/[\s]?"[\s]?/','"',$script);

    $script = preg_replace('/[\s]?\:[\s]?/',':',$script);
    $script = preg_replace('/[\s]?;[\s]?/',';',$script);
    $script = preg_replace('/[\s]?,[\s]?/',',',$script);
    $script = preg_replace('/[\s]?\<script\>[\s]?/','<script>',$script);
    $script = preg_replace('/[\s]?\<\/script\>[\s]?/','</script>',$script);

    //合并css跟js
    $html = preg_replace('/\<style\>[\s\S]*\<\/style\>/',$style,$html);
    $html = preg_replace('/\<script\>[\s\S]*\<\/script\>/',$script,$html);

    return $html;
}