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<?php var_dump( $conv = mb_convert_encoding( $bin = hex2bin("8ffbce8fefc5a5c88fafaca6fedcf7"), "UTF-8", "EUC-JP-2004" ), mb_check_encoding($bin, "EUC-JP-2004"), bin2hex(mb_convert_encoding($conv, "EUC-JP-2004", "UTF-8")) );
Output for 8.1.0 - 8.1.15, 8.2.0 - 8.2.2
string(19) "𨯁濞ト㮍ㇿ樸" bool(true) string(30) "8ffbce8fefc5a5c88fafaca6fedcf7"
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.27
string(19) "𨯁濞ト㮍ㇿ樸" bool(false) string(28) "8ffbce8fefc5a5c88ea5a6fedcf7"

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