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

格式化html单标签需要添加/结束

压缩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

压缩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

压缩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

调用 

<?php

include 'HtmlFormat.php';

$html = file_get_contents('https://www.baidu.com/');

//压缩

$min_html = HtmlFormat::miniHtml($html);

highlight_string($min_html);

//格式化

$max_html = HtmlFormat::fomatHtml($html );

highlight_string($max_html);

代码

压缩与格式化

HtmlFormat.php

<?php
namespace ppt\core;
class HtmlFormat
{public static function miniHtml($s){//注：只支持压缩含一个<script></script>的html,且变量内多个空格也会被压缩为一个//提取css跟javascript单独处理$s = preg_replace('/\<style[\s\S]*\>/U','<style>',$s);
//    preg_replace('/\<script[\s\S]*\>/','<script>',$s);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('/\<style\>[\s\S]*\<\/style\>/','<style></style>',$s);$html = preg_replace('/\<script\>[\s\S]*\<\/script\>/','<script></script>',$html);$html = preg_replace('/\<\!\-\-[\s\S]*\-\-\>/U','',$html);$html = preg_replace('/[\s]+/',' ',$html);$html = preg_replace('/>[\s]+</','><',$html);//处理css$style = preg_replace('/\/\*[\s\S]*\*\//U','',$style);$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]*\*\//U','',$script);$script = preg_replace('/^[\s]*\/\/.*$\n/m','',$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]?\<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 $html;}//格式化htmlpublic static function fomatHtml($content){$content = self::miniHtml($content);preg_match('/\<style\>[\s\S]*\<\/style\>/',$content,$style);preg_match('/\<script\>[\s\S]*\<\/script\>/',$content,$script);empty($style)?$style='':$style = $style[0];empty($script)?$script='':$script = $script[0];$style = str_replace('<style>',"<style>\n",$style);$style = preg_replace('/;\}\}/',"@#",$style);$style = preg_replace('/;\}/',"@@",$style);$style = preg_replace('/\}/',"$$$",$style);$style = preg_replace('/;/',";\n\t",$style);$style = preg_replace('/@#/',";\n\t}\n}\n\n",$style);$style = preg_replace('/@@/',";\n}\n",$style);$style = preg_replace('/\$\$\$/',"\n}\n\n",$style);$style = preg_replace('/\{/',"{\n\t",$style);$style = preg_replace('/\n/',"\n\t\t",$style);$style = str_replace("\t</style>","</style>",$style);$script = self::format_javascript($script);$content = preg_replace('/\<style\>[\s\S]*\<\/style\>/','<style></style>',$content);$content = preg_replace('/\<script\>[\s\S]*\<\/script\>/','<script></script>',$content);$tmp = explode('><', $content);$new = [];foreach ($tmp as $key => $item) {if ($key === 0) {$item .= '>';$new[] = $item;} else if ($key === count($tmp) - 1) {$item = '<' . $item;$new[] = $item;} else {if (strpos($item, '<') !== false || strpos($item, '>') !== false) {$tmp1 = str_replace(['<', '>'], '@', $item);$tmp2 = explode('@', $tmp1);$new[] = '<' . $tmp2[0] . '>';$new[] = str_replace(" ",'',$tmp2[1]);$new[] = '<' . $tmp2[2] . '>';} else {$item = '<' . $item . '>';$new[] = $item;}}}$i = 0;$str = '';foreach ($new as $key => $item) {if(substr($item,0,strlen('<html'))==='<html'||substr($item,0,strlen('<body'))==='<body'){$i=0;}if($key>0){if(substr($new[$key-1],0,strlen('<body'))==='<body')$i=0;}if(strpos($item,'<')===false&&strpos($item,'>')===false){//内容$str.= $item;}else if(substr($item,strlen($item)-2,2)=='/>'){//单标签$p = '';$k = $i;while ($k>0){$p.="\t";$k--;}$str.= $p;$str.= $item;$str.= "\r\n";}else if(strpos($item,'<meta')!==false||strpos($item,'<link')!==false||strpos($item,'<input')!==false||strpos($item,'<img')!==false||strpos($item,'<hr')!==false||strpos($item,'<br')!==false||strpos($item,'<html')!==false){//单标签$p = '';$k = $i;while ($k>0){$p.="\t";$k--;}$str.= $p;$str.= $item;$str.= "\r\n";}else{if(substr($item,0,2)!=='</'){//双标签开始$p = '';$k = $i;while ($k>0){$p.="\t";$k--;}if($key!==(count($new)-2)){if(strpos($new[$key+1],'<')===false&&strpos($new[$key+1],'>')===false){$str.= $p;$str.= $item;}else{$str.= $p;$str.= $item;$str.= "\r\n";}}else{$str.= $p;$str.= $item;$str.= "\r\n";}$i++;}else{//双标签结束$i--;$p = '';$k = $i;while ($k>0){$p.="\t";$k--;}if($key>0){if(strpos($new[$key-1],'<')===false&&strpos($new[$key-1],'>')===false){}else{$str.= $p;}}else{$str.= $p;}$str.= $item;$str.= "\r\n";}}}$str = preg_replace('/\<style\>[\s\S]*\<\/style\>/',$style,$str);$str = preg_replace('/\<script\>[\s\S]*\<\/script\>/',$script,$str);$str = preg_replace('/\n[\s]*\n/m',"\n",$str);return $str;}//格式化jsprivate static function format_javascript($js_code) {$js_code = str_replace(['<script>','</script>'],'',$js_code);$js_code = str_replace(';',";\n",$js_code);$js_code = str_replace('{',"\n{\n",$js_code);$js_code = str_replace('}',"\n}\n",$js_code);$tmp = explode("\n",$js_code);$tmp = array_filter($tmp);$lines = '';$index = 0;$space = '';foreach ($tmp as $item){if(strpos($item,'}')!==false){$index--;}$space = '';for ($i=0;$i<$index;$i++){$space.="\t";}$lines.="\n".$space.$item;if(strpos($item,'{')!==false){$index++;}}$lines = str_replace("\nfunction","\n\nfunction",$lines);$lines = str_replace("\n;",";",$lines);$lines = preg_replace('/\}[\s]+\)/',"})",$lines);$lines = preg_replace('/\)[\s]+\{/',"){",$lines);$lines="<script>\n".$lines."\n</script>";return $lines;}
}
//压缩html