My openshift application PDO query didn't work - php

Question

I am try to connect phpmyadmin database using my php script in openshift
but the result is a empty page.
then, I find the question is the query didn't work
but I don't know why
There is my original code
try{
$dsn = 'mysql:dbname=exampleDataBase;host=127.**.***.***;port=*****';
$dbh = new PDO($dsn, "account", "password");
$sth = $dbh->prepare('SELECT * FROM test1');
$fin = $sth->execute();
while($row = $sth->fetch(PDO::FETCH_ASSOC)){
print_r($row);
}
} catch (PDOException $e){
echo "Sytan error" . $e -> getMessage();
}
$dbh = null;
and the result is a empty page, so I modify my code
There is my modify code
try{
$dsn = 'mysql:dbname=exampleDataBase;host=127.**.***.***;port=*****';
$dbh = new PDO($dsn, "account", "password");
$sth = $dbh->prepare('jngfcjfgcnmgcm,,hmnxf');
$fin = $sth->execute();
while($row = $sth->fetch(PDO::FETCH_ASSOC)){
print_r($row);
}
} catch (PDOException $e){
echo "Sytan error" . $e -> getMessage();
}
$dbh = null;
I input the wrong query sytanx(jngfcjfgcnmgcm,,hmnxf), but it didn't return error.

Answer 1

Add this to your script see your errors
error_reporting(E_ALL | E_STRICT);
ini_set('display_errors',1);
ini_set('html_errors', 1);
and change your query code to this, see notes
try{
//port=***** is only need where its different from the default
$dsn = 'mysql:host=localhost;dbname=exampleDataBase';
$options = array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION);
$dbh = new PDO($dsn, "account", "password", $options);
$sth = $dbh->prepare('SELECT * FROM test1');
// execute $sth
$sth->execute();
//Change fetch to fetchAll
while($row = $sth->fetchAll(PDO::FETCH_ASSOC)){
print_r($row);
}
} catch (PDOException $e){
echo "Sytan error" . $e->getMessage();
}

Answer 2

You modified your code to a wrong statement to see the error message?
You have your PHP errors turned off, when doing a statement like:
$sth = $dbh->prepare('jngfcjfgcnmgcm,,hmnxf');
You would receive an error like:
Sytan errorSQLSTATE[42000]: Syntax error or access violation: 1064 You
have an error in your SQL syntax; check the manual that corresponds to
your MySQL server version for the right syntax to use near
'jngfcjfgcnmgcm,,hmnxf' at line 1
What do you exactly want? The exception is not showing?