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.
範例 1. constant()
example
?php
define ("MAXSIZE", 100);
echo MAXSIZE;
echo constant("MAXSIZE"); // same thing as the previous line
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See also define(),
defined() and the section on Constants.