Online PHP editor | output for qIp5d

Output for 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.20, 8.4.1 - 8.4.6: Warning: Undefined array key "date" in /in/qIp5d on line 33 Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /in/qIp5d on line 33 Warning: Undefined array key "date" in /in/qIp5d on line 33 Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /in/qIp5d on line 33 Warning: Undefined array key "date" in /in/qIp5d on line 33 Deprecated: strtotime(): Passing null to parameter #1 ($datetime) of type string is deprecated in /in/qIp5d on line 33 array ( 0 => array ( 'date_end' => '2012-01-12', 'result' => 60, 'name' => 'Step#1', 'type' => 'Summary', ), 1 => array ( 'date' => '2012-01-10', 'result' => 65, 'name' => 'Les océans', ), 2 => array ( 'date' => '2012-01-11', 'result' => 75, 'name' => 'Les mers', ), 3 => array ( 'date' => '2012-01-13', 'result' => 66, 'name' => 'Les continents', 'type' => 'Scores', ), )