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run code in 200+ php & hhvm versions
Bugs & Features
<?php $extra = []; $seriesMaxNum = max(array_unique(array_column($extra, "pacsfile_series_number"))) + 1;
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
Warning: max(): Array must contain at least one element in /in/2RRl7 on line 5