I keep getting this error:

Fatal error: Cannot use object of type EntityDrupalWrapper as array in /sites/all/modules/rules/modules/php.eval.inc(146) : eval()'d code on line 29

when I use the below PHP code in rule

$t_exists = 0;
$etid = 0;
$vid =10;
$vname = 'emails';

$wrapper = entity_metadata_wrapper('node', $node);
$email_term = $wrapper->field_primary_email->value();

function customs_create_taxonomy_term($email_term, $vid) {
  $term = new stdClass();
  $term->name = $email_term;
  $term->vid = $vid;
  return $term->tid;

function et_exist($vname, $email_term) {
$tid = NULL;
$vocabulary = taxonomy_vocabulary_machine_name_load($vname);
$terms = taxonomy_get_tree($vocabulary->vid);
    foreach ($terms as $term) {
      if ($term->name == $email_term) {
        $tid = $term->tid;
return $tid;

if ($wrapper->field_email_term_reference[0]->value()) {
foreach ($wrapper->field_email_term_reference->getIterator() as $index => $taxWrapper) {
if ($taxWrapper->value()->name == $email_term) {

if (!$t_exists) {
$etid = et_exist($vname, $email_term);
If ($etid) {
$wrapper->field_email_term_reference[] = $etid;
} else {
$etid = customs_create_taxonomy_term($email_term, $vid);
$wrapper->field_email_term_reference[] = $etid;

The line that seems to be causing the problem is:

if ($wrapper->field_email_term_reference[0]->value()) {

Please advice.

  • Which line is causing the problem? – Clive Apr 20 '17 at 15:58
  • The error mentions Line 29 as the cause – Girish Cholayill Apr 20 '17 at 16:09
  • And what's on line 29? You must remember this is a Q+A site, not an excuse to forgo basic debugging! – Clive Apr 20 '17 at 16:30
  • I believe this is the line causing the error: if ($wrapper->field_email_term_reference[0]->value()) { Sorry for the confusion, I am not a developer, do not know much about coding, trying to learn it with help from sites like these. I appreciate you trying to help me out – Girish Cholayill Apr 20 '17 at 16:35
  • No apology necessary, we just need to be clear about the real source of the issue to a) make sure you get a valid answer without things devolving into a support session in the comments, and b) make sure people with a similar problem in future will be able to identify that this one is indeed similar to theirs :) – Clive Apr 20 '17 at 20:20

The code is trying to access an EntityDrupalWrapper as if it was an EntityValueWrapper, which might suggest the field simply doesn't have a value for the entity that's throwing the error.

Since you're explicitly getting the first field item anyway, changing the if statement to something like this would probably fix it:

if ($wrapper->field_email_term_reference->value()) {
  • when I replace the code, it gives me the same error, but now eval()'d code on line 43, which is: $wrapper->field_email_term_reference[] = $etid; I am truly lost. What does this error mean? – Girish Cholayill Apr 20 '17 at 20:38
  • Possibly that the field was added after nodes of the type it was added to already existed. That sometimes throws entity metadata wrappers out of whack. I can only guess though, you need someone with access to the code and database to debug this really, there aren't many general pointers to give – Clive Apr 21 '17 at 10:30

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