错误：获取"未定义的数组键"whule在打开的购物车中运行我的应用程序

Question

MY CODE:

$data['components'][] = array(
'id_component' => $component['id_component'],
'id_layout' => $component['id_layout'],
'component_type' => $this->model_webservice_webservice->getComponentTypeByID($component['id_component_type']),
'component_heading' => @$component['component_heading'],
'data' => $component_data,
'product_data' => $products
);

错误行:"component_heading"=比;@ $组件[' component_heading '],

误差:未定义数组键"component_heading"in C:xampphtdocs***extensionmodulewebservice.php on line 1870Warning:

Answer 1

避免使用错误抑制操作符(它的行为自PHP8以来已更改)

当没有这样的键时，可以使用以下语法之一:

'component_heading' => $component['component_heading'] ?? null, // null coalesce operator
'component_heading' => isset($component['component_heading']) ? $component['component_heading'] : null,
'component_heading' => array_key_exists('component_heading', $component) ? $component['component_heading'] : null,