在php中执行依赖语句

Question

There is two php statement:

1) $this->db->query($sql);
2) $this->db->query($sql2);

how to make sure that 2nd statement executes if only the first one executes?

I have tried like following but it doesn't work.

$query = $this->db->query($sql);
if($query != NULL) {
 $this->db->query($sql2);
}

Answer 1

try this

$query = $this->db->query($sql);
if(!empty($query)) {
 $this->db->query($sql2);
}