use constant as more intuitive example

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@197336 c90b9560-bf6c-de11-be94-00142212c4b1

reference/expect/reference.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.1 $ -->
+<!-- $Revision: 1.2 $ -->
 <!-- Purpose: system -->
 <!-- Membership: pecl -->
 
@@ -49,30 +49,28 @@
      <programlisting role="php">
 <![CDATA[
 <?php
-
 ini_set ("expect.loguser", "Off");
 
-$fp = expect_popen ("ssh root@remotehost uptime");
+$stream = popen ("expect://ssh root@remotehost uptime", "r");
 
 $cases = array (
-  array (0 => "password:", 1 => "PASSWORD")
+  array (0 => "password:", 1 => PASSWORD)
 );
 
-switch (expect_expectl ($fp, $cases))
+switch (expect_expectl ($stream, $cases))
 {
- case "PASSWORD":
-  fwrite ($fp, "password\n");
+ case PASSWORD:
+  fwrite ($stream, "password\n");
   break;
  
  default:
   die ("Error was occurred while connecting to the remote host!\n");
 }
 
-while ($line = fgets ($fp)) {
+while ($line = fgets ($stream)) {
   print $line;
 }
-fclose ($fp);
-
+fclose ($stream);
 ?>
 ]]>
      </programlisting>