Best way to automatically remove comments from PHP code

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I’d use tokenizer. Here’s my solution. It should work on both PHP 4 and 5:

$fileStr = file_get_contents('path/to/file');
$newStr="";

$commentTokens = array(T_COMMENT);
    
if (defined('T_DOC_COMMENT')) {
    $commentTokens[] = T_DOC_COMMENT; // PHP 5
}

if (defined('T_ML_COMMENT')) {
    $commentTokens[] = T_ML_COMMENT;  // PHP 4
}

$tokens = token_get_all($fileStr);

foreach ($tokens as $token) {    
    if (is_array($token)) {
        if (in_array($token[0], $commentTokens)) {
            continue;
        }
        
        $token = $token[1];
    }

    $newStr .= $token;
}

echo $newStr;

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