Created a function for strpos array

strpos.php

<?php

// Function for array user agent check
function strposa ($haystack, $needle, $offset=0) {
    if (!is_array($needle)) $needle = array($needle);
    foreach ($needle as $query) {
      if (strpos($haystack, $query, $offset) !== false) return true;
    }
    return false;
}

$flag = false;
$tmp = $_SERVER['HTTP_USER_AGENT'];
$user_agent = array('Googlebot', 'Baiduspider');

//var_dump(strposa($tmp, $user_agent, 1));

// Check if user agent is true
if (strposa($tmp, $user_agent,1) !== false) $flag = true;

if ($flag == false) {
  header('Location:http://www.myurl.net');
} else {
  require_once('default.php'); 
}