constant
    (PHP 4 >= 4.0.4)
constant -- Returns the value of a constant
Description
mixed 
constant ( string name)
     constant() will return the value of the      constant indicated by name.     
     constant() is useful if you need to retrieve      the value of a constant, but do not know it's name.  i.e. It is      stored in a variable or returned by a function.     
     
| Example 1. constant() example | <?php
define ("MAXSIZE", 100);
echo MAXSIZE;
echo constant("MAXSIZE"); // same thing as the previous line
 ?> | 
 | 
     
     See also define(),      defined() and the section on Constants.