3v4l.org

run code in 300+ PHP versions simultaneously
<?php mb_internal_encoding('UTF-8'); echo 'Subject: ', mb_encode_mimeheader(''', 'UTF-8', 'B');
Output for 5.4.0 - 5.4.19
Parse error: syntax error, unexpected '', '' (T_CONSTANT_ENCAPSED_STRING) in /in/PY5ha on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING in /in/PY5ha on line 4
Process exited with code 255.
preferences:
196.46 ms | 1395 KiB | 55 Q