3v4l.org

run code in 300+ PHP versions simultaneously
<?php $regexEncoding = "CP1251"; var_dump(mb_regex_encoding($regexEncoding));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught ValueError: mb_regex_encoding(): Argument #1 ($encoding) must be a valid encoding, "CP1251" given in /in/g0vtF:4 Stack trace: #0 /in/g0vtF(4): mb_regex_encoding('CP1251') #1 {main} thrown in /in/g0vtF on line 4
Process exited with code 255.
Output for 4.3.4 - 4.3.11, 4.4.0 - 4.4.9, 5.0.4 - 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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: mb_regex_encoding(): Unknown encoding "CP1251" in /in/g0vtF on line 4 bool(false)
Output for 5.0.0 - 5.0.3
bool(true)
Output for 4.3.2 - 4.3.3
Fatal error: Call to undefined function: mb_regex_encoding() in /in/g0vtF on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: mb_regex_encoding() in /in/g0vtF on line 4

preferences:
273.97 ms | 401 KiB | 452 Q