3v4l.org

run code in 300+ PHP versions simultaneously
<?php class a {function c(int $a = null) {} } class b extends a {function c(?int $a = null) {} } class d extends b {function c(int $a = null) {} }
Output for 8.4.1 - 8.4.15, 8.5.0
Deprecated: a::c(): Implicitly marking parameter $a as nullable is deprecated, the explicit nullable type must be used instead in /in/5vo1U on line 3 Deprecated: d::c(): Implicitly marking parameter $a as nullable is deprecated, the explicit nullable type must be used instead in /in/5vo1U on line 5
Output for 8.3.28
/bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.3.28) /bin/php-8.3.28: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.3.28)
Process exited with code 1.
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27
preferences:
115.78 ms | 409 KiB | 5 Q