constant

Returns the value of a constant (PHP 4 >= 4.0.4)
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 565. constant() example

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<?php

define ("MAXSIZE", 100);

echo MAXSIZE;
echo constant("MAXSIZE"); // same thing as the previous line

?>

See also define(), defined() and the section on Constants.

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