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run code in 200+ php & hhvm versions
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<?php $x='lknodsijfoasj KJHGK.JG O O T *&$%&$ (*POL{:}{:>?><:}:*(^*&$*&IKLKJLWSM{W+|{#+-*-++'; var_dump(preg_replace('.G..G.i','',$x));
Output for 4.3.11 - 7.2.0
Warning: preg_replace(): Unknown modifier '.' in /in/A3tCb on line 3 NULL
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '.' in /in/A3tCb on line 3 NULL