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$sqlstr="select 'news_picaddress','news_head','news_class_id','news_type_id','news_id' from news where news_pic=1";
$linkrs = mysql_connect("localhost","root","root");
if (!$linkrs)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("xinwen");
$result = mysql_query($sqlstr);
$rows_num = mysql_num_rows($result); //$rows_num=2
$count = 0;
while ($rs=mysql_fetch_array($result,MYSQL_ASSOC) && $count < 5)
{
print_r($rs); //输出1
$picaddress=$rs["news_picaddress"]; //值为null
$count++;
}