3v4l.org

run code in 300+ PHP versions simultaneously
<?php /* mb_internal_encoding('ISO-8859-1'); echo 'Subject: ', mb_decode_mimeheader('=?UTF-8?B?w5DCncOQwr7DkMKyw5HCi8OQwrkgw5DCssOQwr7DkMK/w5E=?= =?UTF-8?B?woDDkMK+w5HCgSDDkMK9w5DCsCDDkcKBw5DCsMOQwrnDkcKCw5DCtSA=?= =?UTF-8?B?Y3JlZGl0Y2FyZHNvbmxpbmUucnU=?='); */ $name = 'Новый вопрос на сайте ff.ru'; $addr = mb_encode_mimeheader($name, "ISO-8859-1", "B"); echo $addr;
Output for 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
=?ISO-8859-1?B?Pz8/Pz8gPz8/Pz8/ID8/ID8/Pz8/IGZmLnJ1?=
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35
=?ISO-8859-1?B?0J3QvtCy0YvQuSDQstC+0L/RgNC+0YEg0L3QsCDRgdCw0LnRgtC1IGZm?= =?ISO-8859-1?B?LnJ1?=
preferences:
235.52 ms | 403 KiB | 356 Q