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run code in 150+ php & hhvm versions
Bugs & Features
<?php $data = '5ser@5ebsite.com'; var_dump($data['5onfirmed']); var_dump(isset($data['5onfirmed']));
based on gj5cN
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: A non well formed numeric value encountered in /in/7QZgG on line 3 string(1) "5" bool(false)
Output for 5.0.0 - 5.0.2, hhvm-3.10.0 - 3.12.0
string(1) "5" bool(false)
Output for 4.3.0 - 4.4.9, 5.0.3 - 5.3.29
string(1) "5" bool(true)