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<?php var_dump(mb_detect_encoding('&', 'UTF7-IMAP', false)); var_dump(mb_convert_encoding('&', 'UTF-8', 'UTF7-IMAP'));
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.14
string(9) "UTF7-IMAP" string(1) "?"
Output for 8.0.1 - 8.0.30
bool(false) string(0) ""
preferences:
86.7 ms | 406 KiB | 5 Q