How to avoid PHP Notice "Undefined offset: 0" without checking each field of array

Question

i have the following array:

    $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']     ); 

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

Notice: Undefined offset: 0 in bafa_insert_keyvisual() ...........

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?

thanks for help

Answer 1

No there is not

You can do an isset():

if(isset($array[0])){     echo $array[0]; } else {   //some error? } 

Or if you know that you are only going to be checking index 0:

$array = $array + array(null); 

So if the original $array[0] was unset, now it is null

Answer 2

Yes, add @ before the field like:

$keyvisual_data = array(     'video_file'            => @$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'] ); 

and then initialize the nulls:

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

etc...