Question

php中，一个变量可不可以同时包含一个变量和一串字符的

if ($row['id']==1){
$num="select *from news order by id desc limit".$row['id']-1.",1";
$mysqli->query($num);
echo "<a href='http://auto.sohu.com/20140731/n402966102.shtml'>".$row['content']."</a>";
echo "<br/>";
}

本人新手，上面代码第二行报错，懂的帮我修改下，谢谢！

Answer 1

if ($row['id']==1){
$num="select *from news order by id desc limit".($row['id']-1).",1"; //这里加个括号就可以了
$mysqli->query($num);
echo "<a href='http://auto.sohu.com/20140731/n402966102.shtml'>".$row['content']."</a>";
echo "<br/>";
}