Online PHP editor | output for RHPkY

Output for 8.0.13, 8.5.1: Fatal error: Uncaught Error: Class "Collator" not found in /in/RHPkY:5 Stack trace: #0 {main} thrown in /in/RHPkY on line 5
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.28, 5.5.31 - 5.5.33, 5.5.35, 5.6.7 - 5.6.12, 5.6.16 - 5.6.19, 5.6.21 - 5.6.28, 7.0.0 - 7.0.4, 7.0.6 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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 - 8.3.28, 8.4.1 - 8.4.14, 8.4.16, 8.5.0: Array ( [0] => Äpfel [1] => Birnen [2] => drüber [3] => Österreich [4] => Über [5] => über )
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 7.0.5, 7.3.32 - 7.3.33, 7.4.33: Fatal error: Uncaught Error: Class 'Collator' not found in /in/RHPkY:5 Stack trace: #0 {main} thrown in /in/RHPkY on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.5.29 - 5.5.30, 5.5.34, 5.6.13 - 5.6.15, 5.6.20: Fatal error: Class 'Collator' not found in /in/RHPkY on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected ',', expecting '(' in /in/RHPkY on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected ',', expecting '(' in /in/RHPkY on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `'('' in /in/RHPkY on line 6
Process exited with code 255.