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<?php $arr = array('123' => '456'); $obj = (object)$arr; var_dump($obj, $obj->{'123'});
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
object(stdClass)#1 (1) { ["123"]=> string(3) "456" } string(3) "456"
Output for 5.2.6 - 5.2.17, 5.3.0 - 5.3.29, 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
Notice: Undefined property: stdClass::$123 in /in/nLE4G on line 6 object(stdClass)#1 (1) { [123]=> string(3) "456" } NULL
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.5
Notice: Undefined property: stdClass::$123 in /in/nLE4G on line 6 object(stdClass)#1 (1) { [123]=> string(3) "456" } NULL
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
object(stdClass)(1) { [123]=> string(3) "456" } string(3) "456"

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