$linkchecker_excludes = variable_get('linkchecker_exclude');
$form['field']['linkchecker_exclude'] = array (
'#type' => 'checkbox',
'#title' => t('Exclude field from Link Checker scans'),
'#description' => t('Force Link Checker to ignore this field when scanning content for broken links.'),
'#default_value' => $linkchecker_excludes[$form['#field']['field_name']] ? $linkchecker_excludes[$form['#field']['field_name']] : 0,
);
If the field name is not in the excludes array, you get an "Undefined array key" warning.
Visit /admin/structure/taxonomy/TAXONOMY_NAME/fields/FIELD_NAME for a field that is not excluded from linkchecker.
This fixes the issue.
'#default_value' => isset($linkchecker_excludes[$form['#field']['field_name']]) ? $linkchecker_excludes[$form['#field']['field_name']] : 0,
1.0
Code