优化页面css和js加载

application/libraries/simple_html_dom_lib.php

@@ -0,0 +1,9 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+
+
+require '/lib/simple_html_dom.php';
+
+
+class Simple_html_dom_lib extends CI_Controller{
+
+}

application/third_party/htmlcompressor/controllers/index.php

@@ -0,0 +1,116 @@
+<?php
+
+if (!defined('BASEPATH'))
+    exit('No direct script access allowed');
+
+class Index extends CI_Controller {
+
+    public function __construct() {
+        parent::__construct();
+        $this->load->library('simple_html_dom_lib');
+    }
+
+    public function index() {
+        $this->load->view('welcome');
+    }
+
+    public function optimize() {
+        $htmlsource = $this->input->post('htmlsource');
+        $websitehost = $this->input->post('websitehost');
+        if (empty($htmlsource) || empty($websitehost)) {
+            $this->output->set_status_header(500);
+            echo 'error:htmlsource or websitehost is empty!';
+            return false;
+        }
+        //域名后面不能有/
+        if (substr($websitehost, -1, 1) == '/') {
+            $websitehost = substr($websitehost, 0, -1);
+        }
+
+        $html_object = str_get_html($htmlsource);
+        if (!empty($html_object)) {
+
+//提取和下载所有CSS样式，包括链接文件和页面样式
+            $link_css_array = array();
+            $css_content = '';
+            foreach ($html_object->find('link') as $link_css) {
+                if ($link_css->rel == 'stylesheet' && !empty($link_css->href)) {
+                    $link_css_array[] = $link_css->href;
+                    $link_css->outertext = ''; //删除链接
+                }
+            }
+            //print_r($link_css_array);
+            foreach ($link_css_array as $item) {
+                $css_content.= GET_HTTP($this->format_url($item, $websitehost));
+            }
+            foreach ($html_object->find('style') as $style_css) {
+                if ($style_css->type == "text/css") {
+                    $css_content .= $style_css->innertext;
+                }
+            }
+            // echo $css_content;
+            // echo $html_object;die();
+            // 
+//提取和下载所有JS脚本，包括链接文件和页面脚本
+            $link_js_array = array();
+            $js_content = '';
+            foreach ($html_object->find('script') as $link_script) {
+                if (!empty($link_script->src)) {
+                    $link_js_array[] = $link_script->src;
+                    $link_script->outertext = ''; //删除链接，移动到页底
+                } else {
+                    //网页内的js不需要提取
+                    //$js_content.= $link_script->innertext;//js的内容
+                    $js_content.= $link_script;
+                    $link_script->outertext = ''; //删除js，移动到页底
+                }
+            }
+
+            foreach ($link_js_array as $item) {
+                //$js_content.= GET_HTTP($this->format_url($item, $websitehost));
+            }
+            //echo $js_content;
+            //把网页内容和css提交到purifycss处理
+            $optimize_css = GET_HTTP('http://184.172.113.219:33033/', 'html_source=' . urlencode($htmlsource) . '&html_css=' . urlencode($css_content), 'POST');
+            if (empty($optimize_css)) {
+                $this->output->set_status_header(500);
+                echo 'css精简错误';
+                echo '<!-- ' . $css_content . ' -->';
+                return FALSE;
+            }
+
+            //把精简的css添加到head后面
+            $html_object = str_replace('</title>', '</title><style type="text/css">' . $optimize_css . "</style>", $html_object);
+
+//在最后加载原始css文件和js文件
+            $lastload_js = '<script>';
+            //把css移动到页面底部
+            foreach ($link_css_array as $item) {
+                $lastload_js.='var elem=document.createElement("link");elem.rel="stylesheet";elem.type="text/css";elem.href="' . $item . '";document.body.appendChild(elem);';
+            }
+            $lastload_js.='</script>';
+            //把js移动到页面底部
+            foreach ($link_js_array as $item) {
+                $lastload_js.='<script src="' . $item . '"></script>';
+            }
+            $lastload_js.=$js_content;
+
+            $html_object = str_replace('</body>', $lastload_js . '</body>', $html_object);
+        }
+        echo $html_object;
+    }
+
+//格式化url，保证请求的URL有域名，//更换为对应的域名路径
+    function format_url($url, $host = '') {
+        if (substr($url, 0, 8) == 'https://' || substr($url, 0, 7) == 'http://') {
+            return urldecode($url);
+        }
+
+        if (substr($url, 0, 2) == '//') { //https或http
+            return urldecode(str_replace('//', 'http://', $url));
+        }
+
+        return urldecode($host . $url);
+    }
+
+}

application/third_party/htmlcompressor/views/welcome.php

@@ -0,0 +1,22 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml">
+    <head>
+        <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
+        <meta http-equiv="Expires" CONTENT="0"/>        
+        <meta http-equiv="Cache-Control" CONTENT="no-cache"/>        
+        <meta http-equiv="Pragma" CONTENT="no-cache"/>
+        <title>HTML-Compressor</title>
+    </head>
+    <script type="text/javascript">
+
+    </script>  
+    <body>
+        <h1>页面样式精简</h1>
+        <form name="form_htmlsource" id="form_htmlsource" action="<?php echo site_url('apps/htmlcompressor/index/optimize'); ?>" method="post">
+            <input type="text" name="websitehost" id="websitehost" style="width:200px;" placeholder="域名" /><br/><br/>
+            <textarea name="htmlsource" id="htmlsource" rows="22" style="width:800px;" placeholder="网页代码" ></textarea>
+            <input type="submit"/>
+        </form>
+
+    </body>
+</html>

lib/第三方类库，调用方法请看.txt

@@ -10,3 +10,6 @@ require APPPATH.'/libraries/lib/alipay_service.class.php';
 class xxx extends CI_Controller{
  
 
+
+调用方法
+$this->load->library('image_lib');