Insert, Update, Create Table, queries not working in wampserver - php

Question

I've been using wampserver for a php project, but DML queries are not working for me. Here is some test code I've been using
$query='insert into register(first_name) values("swagmaster")';
echo($query);
$query = mysqli_real_escape_string($connection,$query);
echo"<br>$query";
if(mysqli_real_query($connection,"'".$query."'")===TRUE)
{
echo"woohoo!";
}
else
{
echo"query failed";
}
echo(mysqli_error($connection));
I get the following output when i run this:
insert into register(first_name) values("swagmaster")
insert into register(first_name) values(\"swagmaster\") query failed
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 ''insert into register(first_name) values(\"swagmaster\")'' at line 1
However, a select statement works fine. I suspect the issue is in mysql settings. Any suggestions?
UPDATE:
Using a combination of your tips, the query is now working. Thank you all!

Answer 1

Please try this query
$query = "INSERT INTO `register` SET `fieldname`='{$vaue}',`field2`='{$value2}'";

Answer 2

Change the query from
$query='insert into register(first_name) values("swagmaster")';
to
$query="insert into register(first_name) values('swagmaster')";
Also as Fred-ii said you dont need to add ' here
if(mysqli_real_query($connection,"'".$query."'")===TRUE)
change to
if(mysqli_real_query($connection,$query)===TRUE)

Answer 3

You used
$query = mysqli_real_escape_string($connection,$query);
But this escaped all quotes in query. This is incorrect. For protected fro SQL injection you should use escape function only to value instead query.
For your example you not need this string.
But if you use variables then you should use it
$value = "swagmaster";
$value = mysqli_real_escape_string($value);
$query='insert into register(first_name) values("' . $value . '")';
In $query is already correct query. And add quotes is incorrect. Just use
if(mysqli_real_query($connection, $query)===TRUE)