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<?php $element['#attributes']['id'] = 'blah'; $description_id = isset($element['#attributes']['id']) ?: ''; var_dump($description_id . '--description');
Output for 5.6.38, 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
string(14) "1--description"
preferences:
189.82 ms | 408 KiB | 5 Q