Question

I’m using MySQL PHP class to get the max id from the table.

$sql="SELECT MAX(id) FROM `".TABLE_CUSTOMERS."`";
$rows = $db->fetch_array($sql);

Now I want to use that max id as value and add 1 to it.

$maxid=rows[0];
$newid=maxid+1;

Above code don’t work.

if I do print_r on $maxid I get that:

( [MAX(id)] => 5 )

Before that MySQL PHP Class I used to do this like that:

$MaxID = mysql_query("SELECT MAX(face_id) FROM `".$DBprefix."faces`");
$MaxID = mysql_fetch_array($MaxID, MYSQL_BOTH);
$MaxID = $MaxID[0];
$newid=$MaxID+1;

And that worked without problem

Here is fetch_array function:

public function fetch_array($sql){
 $query_id = $this->query($sql);
 $out = array();

 while ($row = $this->fetch($query_id)){
  $out[] = $row;
 }

 $this->free_result($query_id);
 return $out;
}

Answer 1

try using an alias to define the max value;

$sql="SELECT MAX(id) as `max` FROM `".TABLE_CUSTOMERS."`";

and you should be able to retrieve the max value in:

$rows[0]['max'];

So adding 1:

$newId = $rows[0]['max']+1;