How to tell when query executed successfully in PHP PDO? [duplicate] - php

Question

This question already has answers here:
PDO mysql: How to know if insert was successful
(7 answers)
Closed 6 years ago.
How can I test to see if the following query executed successfully?
$STH = $this->_db->prepare("UPDATE UserCreds SET
VerificationString=:newVerificationString, ExpiryDate=:expiryDate
WHERE UserID = :userID;");
$STH->execute($params);
I know I can use lastInsertId() when I'm adding new rows, but what about UPDATEs and SELECTs?

Answer 1

The execute returns true on success and false on failure.
From Docs:
Returns TRUE on success or FALSE on failure.
So you can make sure query ran successfully like:
if ($STH->execute($params))
{
// success
}
else
{
// failure
}

Answer 2

execute() returns true/false based on success/failure of the query:
$status = $STH->execute($params);
if ($status) {
echo 'It worked!';
} else {
echo 'It failed!';
}
One note: a select query which returns no rows is NOT a failure. It's a perfectly valid result that just happens to have NO results.

Answer 3

simply i can count the number of row effected:
$stmt->execute();
$count = $stmt->rowCount();
if($count =='0'){
echo "Failed !";
}
else{
echo "Success !";
}

Answer 4

This is best way to verify Doctrine query result return success or failed
result and same way as per above suggest to check weather query
returns Success on True and Failed on false.
public static function removeStudent($teacher_id){
$q = Doctrine_Query::create()
->delete('Student s')
->where('s.teacher_id = ?');
$result = $q->execute(array($teacher_id));
if($result)
{
echo "success";
}else{
echo "failed";
}
}