php 正则抓取百度图片

<?php

//获取网页
function get_ssl_html($url) {
    //file_get_contents()
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_REFERER, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    $result = curl_exec($ch);
    curl_close($ch);
    return $result;
}
function get_thing_images_url_baidu($th) {//获取食材图片url
    $thing = urlencode($th);
    $url = "https://image.baidu.com/search/index?tn=baiduimage&word=$thing";
    $html = get_ssl_html($url);
    $pattern = '/thumbURL":"(.+?)"/is';
    preg_match_all($pattern, $html, $match);

    $arr=array();
    foreach ($match[1] as $img){
        if (strstr($img,"jpg")) {
            $arr[]=$img;
        }
    }

    return $arr;
}


var_dump( get_thing_images_url_baidu("瑞士卷"));