help with variabales in variable names

[megahard]

say i have:

$answer0
$answer1
$answer2
$answer3

then i wana say:

$i=0;
while($i<4 && ___$answer.$i___ !=""){
......;}

___$answer.$i___ needs changing to sumthing that works, how could i do this?

[krs-one]

I am not 100% sure, but I think you can use the eval() function. It evaluates a string as PHP code and then interprets it.

http://www.php.net/

-Vic

[megahard]

i think u miss understood

using $i=0;
im trying to tell it to get the varible $answer0;

[krs-one]

Something like:

$var = eval("\$answer$i"); 

Should work. Untested, and I am not 100% sure, but you should use the eval() function.

Search for it on php.net

-Vic

[megahard]

nope, didnt work

[Freddie Bingham]

while($i < 4 AND ${answer.$i} != '') { 
;
} 

or:

while ($i < 4) {
  $temp = "answer$i";
  if ($$temp != '') {
    ;
  }
} 

or probably a better strategy:

$answer = array();
$answer[] = 'something';
$answer[] = 'something else';
$answer[] = ' and yet';
$answer[] = 'something else again';
foreach ($answer as $index => $value) {
  echo "index -- $value<br />";
} 

or:

$answer = array('something', 'something else', ' and yet', 'something else again');
foreach ($answer as $index => $value) {
  echo "index -- $value<br />";
} 

[megahard]

thanx i used the top one and it worked perfectly.

the reason i cant use an array is becoz the results are coming from a mysql db, and different amounts of rows will be present, i simplified it to make it easy to understand.

seems to have worked

thanx a lot!

[krs-one]

What freddie said.

Well, you could use an array for what you described. Just make it multidimensional.

-Vic