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<?php var_dump( iconv_substr('20', 2, 1), substr('20', 2, 1), mb_substr('20', 2, 1) );
Output for 7.0.11 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.32, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
string(0) "" string(0) "" string(0) ""
Output for 7.3.32 - 7.3.33, 7.4.33, 8.0.13
Fatal error: Uncaught Error: Call to undefined function iconv_substr() in /in/qhP6H:4 Stack trace: #0 {main} thrown in /in/qhP6H on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.10
bool(false) string(0) "" string(0) ""
Output for 5.6.0 - 5.6.28
bool(false) bool(false) string(0) ""
preferences:
154.34 ms | 409 KiB | 5 Q