isset(var), defined(const), ???????(function)

From: Date: Thu, 18 May 2000 00:36:09 +0000
Subject: isset(var), defined(const), ???????(function)
Groups: php.general 
Request: Send a blank email to php-general+get-146@lists.php.net to get a copy of this message
how do I check if a function is defined? I tried both isset() and empty() and neither of them worked. I sure hope that php3 has this facility considering that if you require a file that defines a function in it twice it is an error. I mean even tcl has this ability. cheers, Angus.

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