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<?php $data = [ 'existant_key'=>[] ]; foreach($data['non_existant_key'] as &$row) { } print_r($data);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: foreach() argument must be of type array|object, null given in /in/UNIe4 on line 7 Array ( [existant_key] => Array ( ) [non_existant_key] => )
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Invalid argument supplied for foreach() in /in/UNIe4 on line 7 Array ( [existant_key] => Array ( ) [non_existant_key] => )
preferences:
251.48 ms | 403 KiB | 376 Q