是否可以组成常量名称？

Question

Is there any way to call/compose a constant name in PHP, which does not require the use of eval?

I mean, I have several constant names following this schema:

define("CONSTANT_0", "foo 0");
define("CONSTANT_1", "foo 1");
define("CONSTANT_2", "foo 2");

and I want to be able to go through those values in a loop, something like this:

for ($i=0; $i<3; $i++)
   echo CONSTANT_$i;

I can't use variables here because I'm using a pre-defined shared class, which already contains those values.

Thanks in advance

Answer 1

This would help -

define("CONSTANT_0", "foo 0");
define("CONSTANT_1", "foo 1");
define("CONSTANT_2", "foo 2");

for ($i=0; $i<3; $i++) {
      echo constant('CONSTANT_' . $i);
}

Output

foo 0foo 1foo 2

constant()