在json数组php中存储变量

Question

I'm storing the result of sql in a variable :

$Sql_Query = "select * from users where username = '$username' ";
$check = mysqli_fetch_array(mysqli_query($con,$Sql_Query));

$temp=$check['fierbase_id'];

then I want to pass the variable to Jason Array, am I doing it right?

$registrationIds = array( '$temp' );

Answer 1

You might have a typo on fierbase_id, I think it should be firebase_id.