How can PHP developers troubleshoot issues with query strings not working on specific browsers, such as Safari on an iPhone?

The issue of query strings not working on specific browsers like Safari on an iPhone could be due to encoding or parsing differences. To troubleshoot this, PHP developers can try encoding the query string parameters using urlencode() function before appending them to the URL. This ensures that special characters are properly encoded and can be correctly interpreted by the browser.

// Encode query string parameters before appending to URL
$query_string = http_build_query(array(
    'param1' => urlencode($param1),
    'param2' => urlencode($param2)
));

// Append encoded query string to URL
$url = "https://example.com/api?" . $query_string;

// Redirect to the URL with encoded query string
header("Location: $url");
exit();