웹 스크래핑 전에 PHP에서 404 오류를 효율적으로 확인할 수 있는 방법은 무엇입니까?

// Initialize a cURL handle with the given URL
$handle = curl_init($url);
// Enable return of transfer as a string
curl_setopt($handle, CURLOPT_RETURNTRANSFER, TRUE);
// Get the response (HTML or data linked to the URL)
$response = curl_exec($handle);
// Check for 404 (file not found) response
$httpCode = curl_getinfo($handle, CURLINFO_HTTP_CODE);
// Handle 404
if ($httpCode == 404) {

    /* Perform your custom 404 handling here. */
}
// Close the curl session
curl_close($handle);
// Continue processing with the retrieved $response