Question

I’m trying to run this simple query:

try {
    $dsn = "mysql:host=localhost;dbname:mydb";
    $PDO = new PDO($dsn, 'root', '');
    $statement = $PDO->query("SELECT * FROM posts");
    var_dump($statement);  
} catch (PDOException $e) { exit($e->getMessage()); }

and this output:

bool(false) 

I’m really getting mad about this error. I tried to run the query on my database. $PDO is a PDO Object so technically it is connected to the database. It also seem that nothing gets wrong in all the pro functions. Running the copied and pasted query from $PDO->query() on phpmyadmin return a list of 2 record. I don’t know what to do seriously. I’m starting to pull my hair and hit the wall with the head (it’s not a metaphor).
What am I doing wrong?

Answer 1

You have a DSN problem.

dbname:mydb

should be

dbname=mydb

Don’t you just love programming?

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In addition to the above statement, you should nevertheless enable Exceptions in your PDO attributes. It’s done by adding the following statement right after the connection:

$PDO->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

Further Points

• Naming Convention – It’s an accepted naming convention that variable names begin with a lower case letter, and every consecutive word is in Camel Case, or using underscores.
  Examples: $pdo, $databaseConnection $awesomeMultipleWordedVariable, $another_awesome_multiple_worded_variable.