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run code in 200+ php & hhvm versions
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<?php echo escapeshellarg("dupa zbita w chuj"); echo escapeshellarg('dupa \' $3'); switch (null) { case '': echo 'empty str'; break; case null: echo 'null'; break; }
Output for 4.3.0 - 7.2.0
'dupa zbita w chuj''dupa '\'' $3'empty str