3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(?int $a = null, int $bar): void { }
Output for 8.4.1 - 8.4.14, 8.5.0 - 8.5.1
Deprecated: foo(): Optional parameter $a declared before required parameter $bar is implicitly treated as a required parameter in /in/0VAUk on line 3
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28
Deprecated: Optional parameter $a declared before required parameter $bar is implicitly treated as a required parameter in /in/0VAUk on line 3
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97.39 ms | 409 KiB | 5 Q