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<?php var_dump(mb_detect_encoding('&', 'UTF7-IMAP', false)); var_dump(mb_convert_encoding('&', 'UTF-8', 'UTF7-IMAP'));
Output for 8.0.1 - 8.0.30
bool(false) string(0) ""
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
string(9) "UTF7-IMAP" string(1) "?"
preferences:
36.78 ms | 1140 KiB | 9 Q