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<?php $x=array(1=>'t'); var_dump(key($x), key((array)(object)$x)); $x=array('1'=>'t'); var_dump(key($x), key((array)(object)$x));
Output for 4.4.1, 5.1.0 - 7.1.7
int(1) int(1) int(1) int(1)
Output for 4.3.2 - 4.4.0, 4.4.2 - 5.0.5
Fatal error: Only variables can be passed by reference in /in/LnFeM on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Only variables can be passed by reference in /in/LnFeM on line 4