[Chap 06 - Using A Variable Out Of Scope]

Thanks for your quick reply Larry. I come from Obj-C and Swift. 

 

I get a better understanding now why we use global before var. I guess I'll get used to it

 

Have a great day!

[Chap 06 - Using A Variable Out Of Scope]

Hello Larry,

 

First of all, I'm very glad I got your book. I'm re-learning PHP from scratch and I wished I had a book like yours in the early 2000s 

 

In chapter 6, handle_reg.php, I'm a bit troubled by the variable $age. 

$age should only exist within "if ($_POST['year'] < 2016) {...}"

// Validate the year:
   if (is_numeric($_POST['year']) AND (strlen($_POST['year']) == 4))
   {
     // Check that they were born before 2016
     if ($_POST['year'] < 2016)
     {
       $age = 2016 - $_POST['year']; // Calculate age this year
     }
     else
     {
       print '<p class="error">Either you entered your birth year wrong or you come from the future';
       $okay = false;
     }

But still, you can call it like a global variable at the bottom of the page:

   // If there were no errors, print a success message:
   if ($okay)
   {
     print '<p>You have been successfully registered (but not really).</p>';
     print "<p>You will turn $age this year.<p>";
     print "<p>Your favorite color is a $color_type color.<p>";
   }

In another programming language, I would have defined it as a global variable at the top, then update it later on. Is it a common thing in PHP?

 

Thanks a lot for your time.

 

Cheers!