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run code in 200+ php & hhvm versions
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<?php echo ${'next'}['next']; ?>
based on SH84Z
Output for 5.0.4 - 7.1.7
Notice: Undefined variable: next in /in/KkWuE on line 2
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: next in /in/KkWuE on line 2