information-system/application/libraries/html_optimize_lib.php

<?php

if (!defined('BASEPATH'))
    exit('No direct script access allowed');

/*
 * HTML的优化处理的类库
 */

class html_optimize_lib
{

    var $CI;

    public function __construct()
    {
        $this->CI = &get_instance();
        $this->CI->load->model('Information_model');
        $this->CI->load->model('InfoMetas_model');
        $this->CI->load->library('simple_html_dom_lib');
    }


    //获取图片尺寸
    public function set_image_size($html)
    {return $html;
        $html_object = str_get_html($html);

        //拼接图片链接，获取尺寸
        $request_size = array();
        foreach ($html_object->find('img') as $image) {
            $img_src = $image->src;
            if (!empty($image->originalsrc)) {
                $img_src = $image->originalsrc;
            }
            if (strpos($img_src, '//data.') !== false || strpos($img_src, '//images.') !== false) {//以data或者images开头的域名才能获取尺寸
                $img_src_urls = parse_url($img_src);
                $request_size[$img_src_urls['host']][] = $img_src_urls['path'];
            }
        }

        //请求图片尺寸
        $image_sizes = array();
        foreach ($request_size as $host => $path) {
            $parse_url = "https://{$host}/imagesize.php?photo=" . implode(',', $path);
            $size_data = GET_HTTP($parse_url);
            if (!empty($size_data)) {
                $size_data = json_decode($size_data);
                foreach ($size_data as $size_item) {
                    $size_item->photo = "https://{$host}" . $size_item->photo;
                    $image_sizes[$size_item->photo] = $size_item;
                }
            }
        }
        //print_r($request_size);
        //print_r($image_sizes);
        //把尺寸写入html内容中
        foreach ($html_object->find('img') as $image) {
            $img_src = $image->src;
            if (!empty($image->originalsrc)) {
                $img_src = $image->originalsrc;
            }
            $img_src_urls = parse_url($img_src);
            $img_src_index="https://".$img_src_urls['host'] . $img_src_urls['path'];
            if(!empty($image_sizes[$img_src_index])){
                $image->width=$image_sizes[$img_src_index]->width;
                $image->height=$image_sizes[$img_src_index]->height;
            }
        }
        return $html_object->save();


    }


}