Declaring Global Variables in Function

[neridaj]

Hi,

 

I'm trying to understand why declaring a variable global within a function is not working. I have a function that displays a table of users and is supposed to set a global variable to true when called in order to let another function know whether or not to display a hyperlink. Here is what I have:

 

function display_users($user_array)
{
  // display the table of users

  // set global variable, so we can test later if this is on the page
  global $user_table;
  $user_table = true;
?>
  <br />
  <form name='user_table' action='delete_users.php' method='post'>
  <table width=300 cellpadding=2 cellspacing=0>
  <?php
  $color = "#000000";
  echo "<tr bgcolor='$color'><td><strong>User</strong></td>";
  echo "<td><strong>Delete?</strong></td></tr>";
  if (is_array($user_array) && count($user_array)>0)
  {
    foreach ($user_array as $user)
    {
      if ($color == "#cccccc")
        $color = "#ffffff";
      else
        $color = "#cccccc";
      // remember to call htmlspecialchars() when we are displaying user data
      echo "<tr bgcolor='$color'><td><a href=\"$user\">".htmlspecialchars($user)."</a></td>";
      echo "<td><input type='checkbox' name=\"del_me[]\"
             value=\"$user\"></td>";
      echo "</tr>"; 
    }
  }
  else
    echo "<tr><td>No users on record</td></tr>";
?>
  </table> 
  </form>
<?php
}

function display_admin_menu()
{
?>
<a href="admin_member.php">Home</a>  | 
<?php
  // only offer the delete option if user table is on this page
  global $user_table;
  if($user_table==true)
    echo "<a href='#' onClick='user_table.submit();'>Delete User</a> | "; 
  else
    echo "<font color='#cccccc'>Delete User</font> | "; 
}

 

 

Thanks for any help,

 

Jason

 

[Jessica]

IIRC, using the word global that way means you defined the variable outside of the function, and want to use it IN the function. I think you need to have the function return it, or maybe use the $_GLOBALS array to set it this way?

[neridaj]

It might help if I called the functions in the correct order.

 

Thanks,

 

 

Jason