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<?php $getopt = []; var_dump((int) $getopt['testdox-columns'] ?? null); $getoptFixed = []; var_dump((int) ($getoptFixed['testdox-columns'] ?? null));
Output for git.master, git.master_jit
Warning: Undefined array key "testdox-columns" in /in/ggUUG on line 5 int(0) int(0)

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