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<?php $array = array('test_1' => 1, 'test_2' => 1, 'test_3' => 1); $array['bla']++; $array['bli'] = $array['bli'] + 1; $array['blo'] = $array['blo']++; var_dump($array);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined array key "bla" in /in/cfrUd on line 4 Warning: Undefined array key "bli" in /in/cfrUd on line 5 Warning: Undefined array key "blo" in /in/cfrUd on line 6 array(6) { ["test_1"]=> int(1) ["test_2"]=> int(1) ["test_3"]=> int(1) ["bla"]=> int(1) ["bli"]=> int(1) ["blo"]=> NULL }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined index: bla in /in/cfrUd on line 4 Notice: Undefined index: bli in /in/cfrUd on line 5 Notice: Undefined index: blo in /in/cfrUd on line 6 array(6) { ["test_1"]=> int(1) ["test_2"]=> int(1) ["test_3"]=> int(1) ["bla"]=> int(1) ["bli"]=> int(1) ["blo"]=> NULL }
Output for 7.3.32 - 7.3.33
array(6) { ["test_1"]=> int(1) ["test_2"]=> int(1) ["test_3"]=> int(1) ["bla"]=> int(1) ["bli"]=> int(1) ["blo"]=> NULL }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Notice: Undefined index: bla in /in/cfrUd on line 4 Notice: Undefined index: bli in /in/cfrUd on line 5 Notice: Undefined index: blo in /in/cfrUd on line 6 array(6) { ["test_1"]=> int(1) ["test_2"]=> int(1) ["test_3"]=> int(1) ["bla"]=> int(1) ["bli"]=> int(1) ["blo"]=> NULL }

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