Question

Possible Duplicate:
variable variables

once I have established the first empty input field I then want to give it the value of $_POST['email']; by making the value of $key into a variable but how can I make the value of a variable into a new variable (if you see what I mean) I will try to demonstrate what I mean below:

$email = $_POST['email'];
      foreach( $_POST as $key=> $for ) {
               if($for=="") { 

        //     $ + the value of ($key) = $email;           
                  break;
                }
         }

email: <input name="email">

    a: <input type="text" name="a" value='<?php echo $a; ?>'>
    b: <input type="text" name="b" value='<?php echo $b; ?>'>
    c: <input type="text" name="c" value='<?php echo $c; ?>'>
       <input type="submit">

Answer 1

Use $$key = $email into the foreach, it’ll make a new variable with the variable $key value and assign $email value to it.