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run code in 150+ php & hhvm versions
Bugs & Features
<?php $input = array( 'AND' => 1, 'OR' => 2 ); var_dump( current( array_keys( $input ) ) );
Output for 4.3.0 - 5.0.4, 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(3) "AND"
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/sTi9I on line 3
Process exited with code 255.