This might be a very simple and easy question to answer, perhaps not.
To concatenate a string (by appending/right concat.) in php you use:
$a = "a";
$a .= "b";
//The value will be: "ab"
How do I do this, but the other way around?
Ej.:
$a = "a";
$a ???? "b";
//I NEED the value to be: "ba"
The closest thing to a built-in function would be using strpad like
$a = str_pad($a, strlen($a)+strlen("b"), "b", STR_PAD_LEFT);
but as others have pointed out its much simpler to just do $a = "b" . $a;