November 28, 2011
How to concatenate a string and a variable into a constant name?
Question by rajzana
I have a constant like define(“EMPLOYEE_NAME_ID”,”employee”); and a variable $code = EMPLOYEE;
now i want to print like below
<?php echo $code.NAME_ID; ?>
But this prints only “EMPLOYEE_NAME_ID” and i want to print “employee”. Then how to print this. The all over means is that i want to retriew variables from lang file.
Answer by ajreal
A unquote string in PHP will be parsed as constant,
and if the constant is undefined,
it will treat as the string (instead of a variable)
If you dealing with constant, you can make use of constant function :-
echo constant("{$code}_NAME_ID");
However, use of this function will return warning message if the constant is not defined.
There are other option like parse_ini_file you can take a look,
this is ideal for handling large amount of setting / configuration
