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<?php var_dump(mb_convert_encoding(hex2bin('b1b2b3b4b5'), 'UTF-8', 'JIS')); var_dump(mb_check_encoding(hex2bin('b1b2b3b4b5'), 'JIS'));
Output for git.master, git.master_jit, rfc.property-hooks
string(15) "アイウエオ" bool(true)

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