RE: [PHP] dynamic variables in a while loop?

> -----Original Message----- > From: Philipp Hartmann [mailto:heart@gsdh.org] > Sent: 15 January 2003 12:50 > > Here is what I want to do: > I am getting several variables into a Php Script such as: > > help1 = "yes" / "no" > help2 = "yes" / "no" > . > . > . > helpX = "yes" / "no" > > I need to check whether the variable is true or false, and > according to that > add > 1 to a counter variable. > > Something like this I'd do in ActionScript, but dont know about php > [CODE] > $i = 0; > While (++$i <= 8) { > if ([help]+$i=="yes"){ // this line produces an error... I think you need to read the PHP manual page on variable variables: http://www.php.net/manual/en/language.variables.variable.php -- and the one on string operators: http://www.php.net/manual/en/language.operators.string.php > $counterYes += counterYes; I assume this is a typo for $counterYes += 1 ...! > } > } > [/CODE] > > Do I have to initialize all variables before I can use them in php? No -- but, presuming these values are coming from a form, or a query on the URL, the other thing you need to take account of is the configuration setting for register_globals. If it's on, then fine, the above will work with appropriate amendments to suit PHP syntax; if it's off, then you have to use the $_POST[] or $_GET[] array as appropriate, and in fact the variable variables stuff is not relevant because the array index is just the HelpX string. Cheers! Mike --------------------------------------------------------------------- Mike Ford, Electronic Information Services Adviser, Learning Support Services, Learning & Information Services, JG125, James Graham Building, Leeds Metropolitan University, Beckett Park, LEEDS, LS6 3QS, United Kingdom Email: m.ford@lmu.ac.uk Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211