Difference between revisions of "FUNCTION EXISTS()"

Revision as of 07:23, 10 December 2012

Purpose

Function to check whether a function has been declared

Syntax

FUNCTION_EXISTS(<expC>)

See Also

ENDFUNC, FUNCTION, ISSET(), PROCEDURE, RETURN, TYPE(), UNSET(), VARTYPE()

Description

The FUNCTION_EXISTS() function can be used to check whether a function has been declared. FUNCTION_EXISTS() will return .T. (true) if the function named <expC> has been declared and .F. (false) if it has not been declared. Functions are declared using the FUNCTION or PROCEDURE commands.

Example

function add18
parameter dob
return gomonth(dob,18*12)
 
if function_exists('add18')
    attainmajority = add18(date())
endif