Fatal error: Can't use method return value in write context in empty()
I am getting following error why is this?
Fatal error: Can't use method return value in write context
foreach ($transfer_nids as $nid) {
$wrapper = entity_metadata_wrapper('node', $nid);
$Result[] = array(
'S_name' => empty($wrapper->field_s->value()->title) ? 'no data' : $wrapper->field_s->value()->title,
'r_name' => empty($wrapper->title->value()) ? 'no data' : $wrapper->title->value(),
'max' => empty($wrapper->field_max->value()) ? 'no data' : $wrapper->field_max->value(),
);
}
return ai_wrap_result($Result, 'Info');
}
In (older versions) of PHP (<5.5) you can't use empty() on the return of a function directly, for compiler reasons.
What you need to do instead is save the result in an intermediary variable and check if that is empty() instead, ie,
foreach ($transfer_nids as $nid) {
$wrapper = entity_metadata_wrapper('node', $nid);
$rName = $wrapper->title->value();
$max = $wrapper->field_max->value();
$Result[] = array(
'S_name' => empty($wrapper->field_s->value()->title) ? 'no data' : $wrapper->field_s->value()->title,
'r_name' => empty($rName) ? 'no data' : $wrapper->title->value(),
'max' => empty($max) ? 'no data' : $wrapper->field_max->value(),
);
}
return ai_wrap_result($Result, 'Info');
In older versions of PHP (at least 5.3, but not 5.6), you cannot access members of objects returned by a method:
$wrapper->field_s->value()->title
You must either upgrade your version of PHP, or use a temporary variable.
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