Re: isset() VS if($var)

isset actually sees if the variable exists, and has been assigned a value (where if is obviously checking for boolean truthfulness). Thus... $a = 0; if (isSet($a)) print "A is set"; //This line will execute if (isSet($b)) print "B is set"; //This line never will, as B has not been set to anything every in this script And... if ($a) print "A is true"; //This line won't execute, A is false if ($b) print "B is true"; //Because B has never been set, $b = 0, and this will never execute Hope that helps adamw ----- Original Message ----- From: "Jesper Blomström" <jeppe@partitur.se> To: <php-general@lists.php.net> Sent: Monday, April 09, 2001 1:56 PM Subject: [PHP] isset() VS if($var) > Hi! > > Is there any difference between writing: > > isset($my_var) > > and... > > if ($my_var) > > > ?? > > > Thanks! > > > > / Jesper Blomstroem > > -- > Jesper Blomström > jeppe@partitur.se > Arbete: 08-566 280 08 > Hem: 08-669 23 10 > Mobil: 070-30 24 911 > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > For additional commands, e-mail: php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net > >