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run code in 150+ php & hhvm versions
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<?php $data = array( 'id_rating_review' => 'foo', ); $first = array_shift($data); var_dump($first); var_dump(isset( $first['id_rating_review'] ));
Output for 5.0.0 - 5.0.2, 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(3) "foo" bool(false)
Output for 4.3.0 - 4.4.9, 5.0.3 - 5.3.29
string(3) "foo" bool(true)