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<?php $arr = array("test",array("one"=>1,"two"=>2,"three"=>3), array("one"=>1,"two"=>2,"three"=>3)); $o = new ArrayObject($arr); echo $o->offsetGet('three'),"\n"; foreach ($o as $key=>$val){ echo $key . ' => ' . $val, "\n"; }
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: Undefined array key "three" in /in/7fA1M on line 4 0 => test Warning: Array to string conversion in /in/7fA1M on line 6 1 => Array Warning: Array to string conversion in /in/7fA1M on line 6 2 => Array
Output for 5.4.8 - 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 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined index: three in /in/7fA1M on line 4 0 => test Notice: Array to string conversion in /in/7fA1M on line 6 1 => Array Notice: Array to string conversion in /in/7fA1M on line 6 2 => Array
Output for 7.3.32 - 7.3.33
0 => test 1 => Array 2 => Array
Output for 5.4.0 - 5.4.7
Notice: Undefined index: three in /in/7fA1M on line 4 0 => test Notice: Array to string conversion in /in/7fA1M on line 6 1 => Array Notice: Array to string conversion in /in/7fA1M on line 6 2 => Array
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Notice: Undefined index: three in /in/7fA1M on line 4 0 => test 1 => Array 2 => Array
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Cannot instantiate non-existent class: arrayobject in /in/7fA1M on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: arrayobject in /in/7fA1M on line 3

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