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<?php $c = unserialize('O:7:"Closure":0:{}'); var_dump($c);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14, 8.5.0
Fatal error: Uncaught Exception: Unserialization of 'Closure' is not allowed in /in/LEhlX:2 Stack trace: #0 /in/LEhlX(2): unserialize('O:7:"Closure":0...') #1 {main} thrown in /in/LEhlX on line 2
Process exited with code 255.
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 5.5.13 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
Warning: Erroneous data format for unserializing 'Closure' in /in/LEhlX on line 2 Notice: unserialize(): Error at offset 17 of 18 bytes in /in/LEhlX on line 2 bool(false)
Output for 7.3.32 - 7.3.33
Warning: Erroneous data format for unserializing 'Closure' in /in/LEhlX on line 2 bool(false)
Output for 5.5.0 - 5.5.12
object(Closure)#1 (0) { }

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