3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(substr('abc', -5)); var_dump(substr('abc', -5, 30)); var_dump(substr('abc', 0)); var_dump(substr('abc', 0, 10)); var_dump(substr('abc', 0, 0)); var_dump(substr('abc', 0, -10));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12
string(3) "abc" string(3) "abc" string(3) "abc" string(3) "abc" string(0) "" string(0) ""
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 string(3) "abc" string(3) "abc" string(3) "abc" string(3) "abc" string(0) "" string(0) ""
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
string(3) "abc" string(3) "abc" string(3) "abc" string(3) "abc" string(0) "" bool(false)
preferences:
143.03 ms | 409 KiB | 5 Q