3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(mb_detect_encoding('')); var_dump(mb_str_split('', 1)); var_dump(mb_str_split('', 1, 'ASCII')); var_dump(mb_str_split('', 1, 'UTF-8')); var_dump(str_split('', 1));
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
string(5) "ASCII" array(0) { } array(0) { } array(0) { } array(0) { }
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33
string(5) "ASCII" array(0) { } array(0) { } array(0) { } array(1) { [0]=> string(0) "" }

preferences:
111.4 ms | 407 KiB | 5 Q