Online PHP editor | output for 65FYb

Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Warning: Undefined variable $hash2 in /in/65FYb on line 6 Deprecated: base64_encode(): Passing null to parameter #1 ($string) of type string is deprecated in /in/65FYb on line 6 bool(true)
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 Warning: Undefined variable $hash2 in /in/65FYb on line 6 Deprecated: base64_encode(): Passing null to parameter #1 ($string) of type string is deprecated in /in/65FYb on line 6 bool(true)
Output for 8.0.0 - 8.0.30: Warning: Undefined variable $hash2 in /in/65FYb on line 6 bool(true)
Output for 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: Notice: Undefined variable: hash2 in /in/65FYb on line 6 bool(true)
Output for 7.3.32 - 7.3.33: bool(true)
Output for 5.1.2 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35: Notice: Undefined variable: hash2 in /in/65FYb on line 6 Fatal error: Call to undefined function hash_equals() in /in/65FYb on line 11
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.1: Fatal error: Call to undefined function hash_hmac() in /in/65FYb on line 5
Process exited with code 255.
Output for 4.4.5 - 4.4.9: Fatal error: Call to undefined function: hash_hmac() in /in/65FYb on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4: Fatal error: Call to undefined function: hash_hmac() in /in/65FYb on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Call to undefined function: hash_hmac() in /in/65FYb on line 5