Unexpected 'echo' (T_ECHO)

require_once 'header.php';
  echo "<div class='main'><h3>Please enter your details to log in</h3>";
  $error = $user = $pass = "";
 
  if (isset($_POST['user']))
  {
    $user = sanitizeString($_POST['user']);
    $pass = sanitizeString($_POST['pass']);
    
    if ($user == "" || $pass == "")
        $error = "Not all fields were entered<br>";
    else
    {
      $result = queryMySQL("SELECT user,pass FROM members
        WHERE user='$user' AND pass='$pass'");
 
      if ($result->num_rows == 0)
      {
        $error = "<span class='error'>Username/Password
                  invalid</span><br><br>";
      }
      else
      {
        $_SESSION['user'] = $user;
        $_SESSION['pass'] = $pass;
        die("You are now logged in. Please <a href='members.php?view=$user'>" .
            "click here</a> to continue.<br><br>");
      }
    }
  }
 
  echo <<<_END
    <form method='post' action='login.php'>$error
    <span class='fieldname'>Username</span><input type='text'
      maxlength='16' name='user' value='$user'><br>
    <span class='fieldname'>Password</span><input type='password'
      maxlength='16' name='pass' value='$pass'>
_END;

require_once 'header.php';
  echo "<div class='main'><h3>Please enter your details to log in</h3>";
  $error = $user = $pass = "";

<?php
function rand_om($n, $min, $max)
{
    $value_1 = NULL;       
    for ($i = 0; $i < $n; $i ++) {
        $value = rand($min, $max);
        if ($i == 0) {   
            echo "$value <br>"; 
        } elseif ($value_1 > $value) {
            echo "$value_1 больше $value <br>";
        } elseif ($value_1 < $value) {
            echo "$value_1 меньше $value <br>";
        } else ($value_1 == $value) { 
            echo "$value_1 равно $value <br>";
        }
         $value_1 = $value;
        }
}   
$rand = rand_om(5, -5, 7);
echo $rand;
?>

function rand_om($n, $min, $max)
{
    $value_1 = NULL;
    for ($i = 0; $i < $n; $i ++) {
        $value = rand($min, $max);
        if ($i == 0) {
            echo "$value <br>";
        } elseif ($value_1 > $value) {
            echo "$value_1 больше $value <br>";
        } elseif ($value_1 < $value) {
            echo "$value_1 меньше $value <br>";
        } elseif ($value_1 == $value) { 
            echo "$value_1 равно $value <br>";
        }
         $value_1 = $value;
        }
}   
$rand = rand_om(5, -5, 7);
echo $rand;