SQL if statement PHP establishes a connection to MySQL and executes the code of the SQL statement

Today I wrote a small program, small and small, just to build a link between PHP and MySQL, and implement simple SQL statements.
Novice preliminary interview, but also please a lot of experts to guide the road.
The program source code is as follows:

Copy the Code code as follows:

$conn = mysql_connect ("localhost", "root", "") or Die ("wrong!");
$sel =mysql_select_db ("MyDB", $conn);
$sql = "INSERT into ' mydb '. ' Test ' (
' ID ',
' UID ',
' RegDate ',
' Remark '
)
VALUES (
', ' php200 ', now (), ' dddd '
) ";
$que =mysql_query ($sql, $conn);
if ($que)
echo "true";
Else
echo "wrong";
?>

The above describes the SQL if statement PHP and MySQL to establish a connection and execute the SQL statement code, including the contents of the SQL if statement, I hope to be interested in PHP tutorial friends helpful.

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