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<?php $obj = (object)array( ('123a' + 0) => '456'); var_dump($obj);
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: A non-numeric value encountered in /in/oCFUS on line 2 object(stdClass)#1 (1) { ["123"]=> string(3) "456" }
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: A non well formed numeric value encountered in /in/oCFUS on line 2 object(stdClass)#1 (1) { ["123"]=> string(3) "456" }
Output for 7.3.32 - 7.3.33
object(stdClass)#1 (1) { ["123"]=> string(3) "456" }
Output for 7.1.0 - 7.1.20
Notice: A non well formed numeric value encountered in /in/oCFUS on line 2 object(stdClass)#1 (1) { [123]=> string(3) "456" }
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, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
object(stdClass)#1 (1) { [123]=> string(3) "456" }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
object(stdClass)(1) { [123]=> string(3) "456" }

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192.9 ms | 402 KiB | 312 Q