Why is "self" not represented as its own token in PHP?

In PHP, "self" is not represented as its own token because it is a keyword that is used in the context of class definitions to refer to the current class. To ensure that "self" is recognized as a keyword, it is important to properly handle it within the parser and lexer of the PHP interpreter. This can be achieved by updating the PHP source code to include "self" as a keyword token. 

// Example of updating PHP source code to include "self" as a keyword token
// Add the following code to the PHP source code where tokens are defined

// Add "T_SELF" as a keyword token
define('T_SELF', 370);

// Update the token_get_all() function to recognize "self" as a keyword token
function token_get_all($source) {
    // Implementation of token_get_all function
}

Keywords

PHP self token parser lexer object-oriented programming

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