如何避免PHP公告＆QUOT;未定义抵消：0＆QUOT;不检查阵列的每个场

问题描述

我有以下数组：

    $keyvisual_data = array(
        'video_file'            => $row->field_field_video[0]['rendered']['#item']['uri'],
        'bild_file'             => $row->field_field_bild[0]['rendered']['#item']['uri'],
        'subline_src'           => $row->_field_data['nid']['entity']->field_key_titel['und'][0]['safe_value'],
        'screenreader_src'      => $row->field_field_alt_screenreader[0]['rendered']['#markup'],
        'alt_src'               => $row->field_field_bild[0]['rendered']['#item']['alt']
    );

可能会发生一些字段没有设置，这是好的。其实我得到这个PHP的通知：

it might happen that some of the fields are not set, this is okay. in fact i am getting this PHP notice:

注意：未定义抵消：在bafa_insert_keyvisual 0（）...........

是它在某种程度上可能的情况下，一个默认值分配给每个键它是未定义无需手动检查阵列的每个场？

is it somehow possible to assign a default value to each key in case it is undefined WITHOUT checking each field of the array manually?

感谢您的帮助。

推荐答案

对了，补充 @ 像前场：

$keyvisual_data = array(
    'video_file'            => @$row->field_field_video[0]['rendered']['#item']['uri'],
    'bild_file'             => @$row->field_field_bild[0]['rendered']['#item']['uri'],
    'subline_src'           => @$row->_field_data['nid']['entity']->field_key_titel['und'][0]['safe_value'],
    'screenreader_src'      => @$row->field_field_alt_screenreader[0]['rendered']['#markup'],
    'alt_src'               => @$row->field_field_bild[0]['rendered']['#item']['alt']
);

然后初始化空值：

and then initialize the nulls:

if($keyvisual_data['video_file'] === null)
    $keyvisual_data['video_file'] = $default_video_file;

等等......

etc...

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