php常用的简单遍历id抓取采集

简单遍历id抓取
<?php
$file = file_get_contents('/www/spider/text.txt');   
echo $c=$file;
$end=$c+40;
for ($i=$c; $i<=$end; $i++) { 
  $url="https://www.xxx.com/spider.php?id=".$i;	
$r = file_get_contents($url);
}    
$rend=$end+1; 
$DOCUMENT_ROOT = $_SERVER['DOCUMENT_ROOT'];
$fp = fopen("/www/spider/text.txt",'w');
fwrite($fp,$rend);
fclose($fp);

?>



<?php
$con = mysql_connect("localhost","root","mima");
if (!$con)
{
die('连接数据库失败');
}
mysql_query("SET NAMES 'utf8'",$con);
mysql_select_db("data") or die("数据库不存在！");
$sql = "select id,status from table  where status='0' order by id asc limit 30";
$result99 = mysql_query($sql,$con);

 while($row=mysql_fetch_array($result))
  {  
         echo $url="https://www.xxx.com/content.php?id=".$row[id];
	
$r = file_get_contents($url);
  
   }  

mysql_close($con);
?>