图片采集入库

<?php
header('content-type:text/html;charset=utf-8');
$pdo=new PDO("mysql:host=127.0.0.1;dbname=user",'root','');
$pdo->exec('set names utf8');
$url="http://www.taotao.com/PHP_7/dianshang";
$str=file_get_contents($url);
$reg1='#<div class="tit">热卖商品</div>.*<div class="itemTit" id="itemBest">#isU';
preg_match($reg1,$str,$arr1);
$reg2='#<img src="(.*)" class=".*">.*<p class=".*"><a href=".*" title=".*">(.*)</a>.*</p>.*<font class=".*">(.*)</font>#isU';
preg_match_all($reg2,$arr1[0],$arr2);
$arr3=$arr2[1];
$arr4=$arr2[2];
$arr5=$arr2[3];
foreach($arr3 as $key=>$val){
    $str=file_get_contents($val);
    $path=pathinfo($val);
    $path=$path['extension'];
    $path='img/'.time().mt_rand(1000,9999)."$path";
    file_put_contents($path,$str);
    $pdo->exec("insert into caijitu(tu,shang,jia)values('$path','$arr4[$key]','$arr5[$key]')");
}
?>