https://www.whatismybrowser.com/detect/what-http-h eaders-is-my-browser-sending

<?php 

$fraze="lékárna praha"; // tutaj pořešit encoding 

$url = "https://www.google.cz/search?".urlencode($fraze)."&start=0"; 

$options = array(
  'http'=>array(
    'method'=>"GET",
    'header'=>"Accept-language: en\r\n" .
              "Cookie: foo=bar\r\n" .  
              "User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0" 
  )
);

$context = stream_context_create($options);
$html =  file_get_contents($url, false, $context); 

?>