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<?php mb_regex_encoding("UTF-8"); mb_ereg_search_init('dogle|dog'); $a = mb_ereg_search_regs('dog', 'g'); print_r($a);
Output for 4.3.4 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [0] => dog )
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.2 - 4.3.3
Fatal error: Call to undefined function: mb_regex_encoding() in /in/OW8Wq on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: mb_regex_encoding() in /in/OW8Wq on line 2