The null keyword vs a null byte. They are not the same.

Null Keyword:

• Represents the absence of a value.
• Used in various programming languages to indicate a variable has no assigned value.
• In PHP, it's represented as null.

Null Byte:

• A single byte with a value of zero.
• Represented as \0 in many programming languages.
• Often used as a string terminator in C-style languages.
• Can be used to manipulate strings and file paths in certain contexts.