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run code in 150+ php & hhvm versions
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<?php $str = 'a12'; $secondchar = substr($str, 1, 1); if (!is_string($secondchar)) { echo $secondchar . ' is a not string'; } else { echo $secondchar . ' is a string'; }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1 is a string