What are some potential pitfalls to avoid when implementing EBNF scanning in PHP?

One potential pitfall to avoid when implementing EBNF scanning in PHP is not properly handling whitespace characters. These characters can be significant in EBNF syntax and should not be ignored during the scanning process. To ensure accurate parsing, it is important to account for whitespace characters in the scanning logic. 

// Example code snippet demonstrating how to handle whitespace characters in EBNF scanning
$pattern = '/\s+/'; // Define a pattern to match whitespace characters
$tokens = preg_split($pattern, $input, -1, PREG_SPLIT_NO_EMPTY); // Split input string by whitespace characters

foreach ($tokens as $token) {
    // Process each token accordingly
}

Keywords

EBNF scanning PHP parsing lexer syntax error

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