컬_exec() 함수로 실패를 식별하고 처리하는 방법은 무엇입니까?

try {
    $ch = curl_init();

    // Check initialization and proceed if successful
    if ($ch === false) {
        throw new Exception('Failed to initialize curl');
    }

    // Explicitly set the URL
    curl_setopt($ch, CURLOPT_URL, 'http://example.com/');
    // Ensure return transfer to retrieve website content
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    // Add any additional options here

    $content = curl_exec($ch);

    // Check the return value of curl_exec()
    if ($content === false) {
        throw new Exception(curl_error($ch), curl_errno($ch));
    }

    // Obtain HTTP return code for error checking (should be 200)
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    // Process the retrieved website content here

} catch(Exception $e) {

    // Trigger a user error with detailed information
    trigger_error(sprintf(
        'Curl failed with error #%d: %s',
        $e->getCode(),
        $e->getMessage()
    ),
    E_USER_ERROR);

} finally {
    // Close the curl handle unless it failed to initialize
    if (is_resource($ch)) {
        curl_close($ch);
    }
}