Online PHP editor | output for kEpZH

Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.4, 8.3.6 - 8.3.13: string(37) "This\Namespase\Does\Not\Exists\FooBar" bool(false) bool(false)
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 string(37) "This\Namespase\Does\Not\Exists\FooBar" bool(false) bool(false)
Output for 5.4.0 - 5.4.45: Parse error: syntax error, unexpected 'class' (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/kEpZH on line 6
Process exited with code 255.
Output for 5.3.0 - 5.3.29: Parse error: syntax error, unexpected T_CLASS, expecting T_STRING or T_VARIABLE or '$' in /in/kEpZH on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/kEpZH on line 3 Parse error: syntax error, unexpected T_STRING, expecting T_CONSTANT_ENCAPSED_STRING or '(' in /in/kEpZH on line 3
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, 5.0.0 - 5.0.5: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/kEpZH on line 3 Parse error: parse error, unexpected T_STRING, expecting T_CONSTANT_ENCAPSED_STRING or '(' in /in/kEpZH on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/kEpZH on line 3 Parse error: parse error, expecting `T_CONSTANT_ENCAPSED_STRING' or `'('' in /in/kEpZH on line 3
Process exited with code 255.