FUNCTION EXISTS()
From Lianjapedia
Revision as of 10:31, 16 May 2022 by Yvonne.milne (Talk | contribs)
Contents
Purpose
Function to check whether a function has been declared
Syntax
FUNCTION_EXISTS(<expC>)
See Also
CLASS EXISTS(), ENDFUNC, FUNCTION, IS_FUNCTION(), ISSET(), PEXIST(), PROCEDURE, RETURN, SET LIBRARY, SET PROCEDURE, 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