Re: isset()

I stand firm on strlen() for the following reasons ... if(!$var) will sometimes act strangely (has for me in the past) when variables are set to something other than what you are expecting. if(isset($var)) will return true if your text field is declared but not filled in. if(empty($var)) will return true if $var is set to 0 (for obvious reason) so is only good for certain instances. strlen() on the other hand converts the variable to a string and returns a count of characters. It's never failed or acted funky. For this reason I use it religiously. Others might say "well it's extra overhead" to which I reply "I'll take an extra bazillionth of a second to know for sure I have what I need" --Joe On Thu, Feb 22, 2001 at 08:18:22AM -0800, Steve Edberg wrote: > I would do this: > > if (!$AgeChild) $AgeChild = 'NA'; > > More compact, easier to read (to me, anyway). This presumes that a > value of '' (empty string, interpreted by PHP as false) is NOT a > valid value here. > > As far as your sniplet goes, it is possible that there may be some > PHP type-casting issues here, depending on: whether $AgeChild is > numeric or string; the fact that the STRING "false" isn't equivalent > to the CONSTANT false, the use of == vs. ===. > > Time to check out the docs - specifically the types and variables > sections (also the functions->variables section)... > > - steve > > > > At 5:07 PM -0600 2/22/01, Jacky@lilst wrote: > >People > >I tried to check if teh field has set a vaule in it before submit > >using isset with the sniplet below > > > >if ((isset($AgeChild))=="false") { > >$AgeChild = "NA"; > >} > > > >The resule is that it always displays NA whether or not it has vaule > >in the field, what is the correct way of using isset for this > >purpose? Or should I use empty() ? > >Jack > >jacky@activelifestyle.com > >"There is nothing more rewarding than reaching the goal you set for yourself" > > > -- > +--- "They've got a cherry pie there, that'll kill ya" ------------------+ > | Steve Edberg University of California, Davis | > | sbedberg@ucdavis.edu Computer Consultant | > | http://aesric.ucdavis.edu/ > http://pgfsun.ucdavis.edu/ | > +-------------------------------------- FBI Special Agent Dale Cooper ---+ > > -- > 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 -- ------------------------------------------------------------------------------- Joe Stump, PHP Hacker, joestump98@yahoo.com -o) http://www.miester.org http://www.care2.com /\\ "It's not enough to succeed. Everyone else must fail" -- Larry Ellison _\_V -------------------------------------------------------------------------------