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run code in 150+ php & hhvm versions
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<?php $a = "xxoo;rm -rf /"; $arg = escapeshellarg("/data/files/{$a}"); print $arg; print(escapeshellcmd("rm {$arg}"));
Output for 4.3.3 - 5.3.29, 5.4.1 - 7.1.0
'/data/files/xxoo;rm -rf /'rm '/data/files/xxoo\;rm -rf /'
Output for 5.4.0
'/data/files/xxoo;rm -rf /'rm /data/files/xxoo\;rm -rf /
Output for 4.3.0 - 4.3.2
'/data/files/xxoo;rm -rf /'rm \'/data/files/xxoo\;rm -rf /\'