COUNT（*）中的PHP错误为num

Question

我收到错误Notice: Use of undefined constant num - assumed 'num'我的代码正在关注

$query = "SELECT COUNT(*) AS num FROM $tableName";
$total_pages = mysql_fetch_array(mysql_query($query));
$total_pages = $total_pages[num];

如何解决这个问题？

我没有得到合适的头衔，所以请不要将其改为适合

Answer 1

@AkhileshBChandran给出了一个正确的解决方案。将来，如果您要引用该列，则需要将其放在引号中。

$total_pages = $total_pages['num'];

Answer 2

$total_pages = $total_pages[0];

Answer 3

$total_pages = $total_pages['num'];