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<?php $fn = $foo(...); var_dump($fn('strlen'));
Output for 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.27, 8.3.29 - 8.3.30, 8.4.1 - 8.4.17, 8.5.0 - 8.5.2
Warning: Undefined variable $foo in /in/UWfCn on line 3 Fatal error: Uncaught Error: Value of type null is not callable in /in/UWfCn:3 Stack trace: #0 {main} thrown in /in/UWfCn on line 3
Process exited with code 255.
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.

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