PHP错误 - 未定义的偏移量：1

Question

当URL为domain.com/portfolio时，我收到php错误“undefined offset：1”，但对于domain.com/portfolio/project1则没有。非常感谢提前

$path = drupal_get_path_alias($_GET['q']);
$path = explode('/', $path);
if ($path[0] == 'portfolio' && $path[1] != '') {
    // action
}

Answer 1

if ($path[0] == 'portfolio' && !empty($path[1])) {

Answer 2

if (($path[0] == 'portfolio') && (count($path) > 1) {
  // Do something
}

或者，如果您只想确保索引存在

$path = drupal_get_path_alias($_GET['q']);
$path = explode('/', $path);
$path = array_pad($path, 2, null);
if (($path[0] === 'portfolio') && (!is_null($path[1])) {
  // Do something
}

Answer 3

$path = drupal_get_path_alias($_GET['q']);
$path = explode('/', $path);
if ($path[0] == 'portfolio' && isset($path[1]) && $path[1] != '') {
    // action
}