Two PDO sql statements/Using fetched data for the second statement - php

Question

So I'm new to PHP/PDO and I'm having some problems with passing the fetched variable on to the second statement. I'm also having problems with exceptions i don't know how the right structure for this situation.
try {
$connection->beginTransaction();
$stmt = $connection->prepare("CALL sproc_patient_profile_physical_exam_hdr(?,?,?)");
$stmt->bindValue(1,$casenumber_fetch,PDO::PARAM_INT);
$stmt->bindValue(2,$patientid_val,PDO::PARAM_INT);
$stmt->bindValue(3,$enteredby,PDO::PARAM_STR);
while($row = $stmt->fetch()){
echo $physicalexamid_insert=$row['physicalexamid'];
/* I need to use this data for another try and catch or sql statements for example*/
$count_physical_exam_id = count($physical_exam_id);
for ($x=0; $x < $count_physical_exam_id; $x++) {
if (!(empty($physical_exam_id[$x]))) {
try {
$connection->beginTransaction();
$stmt = $connection->prepare("CALL sproc_patient_profile_physical_exam_dtl(?,?,?,?,?,?,?)");
$stmt->bindValue(1,$casenumber_fetch,PDO::PARAM_INT);
$stmt->bindValue(2,1,PDO::PARAM_INT);
$stmt->bindValue(3,$physical_exam_id[$x],PDO::PARAM_INT);
$stmt->bindValue(4,$physical_exam_desc[$x],PDO::PARAM_STR);
$stmt->bindValue(5,$normal[$x],PDO::PARAM_INT);
$stmt->bindValue(6,$undone[$x],PDO::PARAM_INT);
$stmt->bindValue(7,$specific[$x],PDO::PARAM_INT);
$stmt->execute();
$connection->commit();
} catch(PDOException $ex) {
//$connection->rollBack();
echo $ex->getMessage();
}
}
}
}
$stmt->execute();
$connection->commit();
} catch(PDOException $ex) {
$connection->rollBack();
echo $ex->getMessage();
Can someone help me with this? Thanks.

Answer 1

There's a couple of issues with your code:
You're not executing the first statement before you call fetch on it.
You're over-writing the $stmt variable in your loop.
The opening section of your code should be like this:
$stmt = $connection->prepare("CALL sproc_patient_profile_physical_exam_hdr(?,?,?)");
$stmt->bindValue(1,$casenumber_fetch,PDO::PARAM_INT);
$stmt->bindValue(2,$patientid_val,PDO::PARAM_INT);
$stmt->bindValue(3,$enteredby,PDO::PARAM_STR);
$stmt->execute();
Once you've done that you can loop through with a control statement like you're doing (e.g. while($row = $stmt->fetch(PDO::FETCH_ASSOC)) { ... }).
Inside that control structure, instead of using the variable $stmt for a new (second) statement, use something like $stmt2 or $inner_stmt, so that you don't over-write the outer variable.