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run code in 200+ php & hhvm versions
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<?php print_r(range('a','Z'));
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.22.0, 7.0.0 - 7.2.0
Array ( [0] => a [1] => ` [2] => _ [3] => ^ [4] => ] [5] => \ [6] => [ [7] => Z )