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<?php $obj = (object)array( ('123a' + 0) => '456'); var_dump($obj); if ( isset($obj->{'123a'})) { echo $obj->{'123a'},"\n"; }
based on MIWpG
Output for 7.1.0
Notice: A non well formed numeric value encountered in /in/TF8u2 on line 2 object(stdClass)#1 (1) { [123]=> string(3) "456" }
Output for 5.0.0 - 7.0.14
object(stdClass)#1 (1) { [123]=> string(3) "456" }
Output for 4.3.0 - 4.4.9
object(stdClass)(1) { [123]=> string(3) "456" }