PHP PDO, connecting to database/selecting database + execute - php

Question

This is my code http://prntscr.com/a2d8qq currently, I am learning things but I am really wondering why it will say that there is no database selected, tho I have selected it in line 5, also if I remove the "dbname = users_details" and then execute a query that creates a databse then it is fine. But whenever I create a table in that database (I selected it) it will not make me, I searched across google and it really is the same to my code but mine will not work.
<?php
try {
$connect = new PDO("mysql: host = 'localhost'; dbname = users_details", 'root', '');
$connect->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sqlQuery = "CREATE TABLE MyGuests (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP
)";
$connect->exec($sqlQuery);
echo 'Successfully created table.';
}
catch(PDOException $e) {
echo $e->getMessage();
}
?>

Answer 1

So this fixed my problem: I have to execute a query to use a specified database into where I want my tables to be in. Then in the line 5 I have just removed the "dbname =
<?php
try {
$connect = new PDO("mysql: host = 'localhost';", 'root', '');
$connect->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sqlQuery = "CREATE TABLE details (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP
)";
$connect->exec("use users_details");
$connect->exec($sqlQuery);
echo 'Successfully created table.';
}
catch(PDOException $e) {
echo $e->getMessage();
}
?>