How to concatenate a string and a variable into a constant name?

php variables global lang
Manish Jangir picture Manish Jangir · Nov 28, 2011 · Viewed 8.3k times · Source

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

ajreal picture ajreal · Nov 28, 2011

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

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