Question

I am trying to process a MySQL select result. My problem is that the sample code below only returns an Array containing all values as string-type even for columns that contain integers and floats.

$sth = mysql_query($selectstr);
$rows = array();
while($r = mysql_fetch_row($sth)) {
  foreach ($r as $value) echo gettype($value), "\n";
}

If I pass that array in $r to json_encode(..) I get JavaScript string values in the output (surrounded by quotes) and not unquoted number values (what i need).

How can I query the MySQL database and get a row-array containing the values with the correct type?

Update: Second parameter of mysql_fetch_row(..) removed. Originally I used mysql_fetch_array(..) which accepts the second parameter.

Answer 1

None of the mysql_fetch_* functions are supposed to cast values according to their columns’ types. For some, PHP doesn’t even provide a matching internal data representation (think: BIGINT).

If you know the data-type of a query’s result, you’ll need to cast them manually. Otherwise mysql_field_type() would give you a hint on what type to convert the results to.