CODEWITHSUNDEEP
phpvariablesisset
MeltingDog
MeltingDog

Reputation: 15404

Using dynamic variables with isset()?

I have a loop that has a dynamic variable in it, eg:

while(i < 10){
  echo  ${"dynamic" . $i . "var"};
  $i++;
};

I want to only echo the variable if the original var (say $dynamic3var) is set so I add:

while(i < 10){
  if(isset(${"dynamic" . $i . "var"})){
    echo  ${"dynamic" . $i . "var"};
  $i++;
  };
};

However this wont work as its still picking up $i.

Does anyone know a correct way of doing this?

Upvotes: 1

Views: 1354

Answers (2)

itinance
itinance

Reputation: 12388

Since global variables are bad ideas you should rethink your code. A plain refactoring would be to use an associative array (even if it remains a global variable at the first step). Then you could work with 

if( isset($dynamic[$i]) ) ...

Why are Globals evil? Read this: http://tomnomnom.com/posts/why-global-state-is-the-devil-and-how-to-avoid-using-it

Upvotes: 1

andy
andy

Reputation: 2399

Try this:

while($i < 10){
  $label = "dynamic".$i."var";

  if(isset($$label))
    echo $$label;

  $i ++;
};

Upvotes: 0

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