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run code in 200+ php & hhvm versions
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<?php echo json_encode(array('二','三')); echo intval("4E8C"); echo intval("4E09"); echo '二' > '三';
based on PN4kg
Output for 7.1.0 - 7.2.0
["\u4e8c","\u4e09"]40000000040000000001
Output for 5.4.0 - 7.0.20
["\u4e8c","\u4e09"]441