使用Regex - PHP删除JavaScript注释

Question

I want to minify HTML code using PHP && Regex code

The minify function :

public static function sanitize_output($buffer) {

    $search = array(
        '/ {2,}/',
        '/<!--.*?-->|\t|(?:?
[ \t]*)+/s'
    );
    $replace = array(
        ' ',
        ''
    );
    $buffer = preg_replace($search, $replace, $buffer);

    return $buffer;
}

I use this function when I rendering the template (HTML file), but I get always this error on console

SyntaxError: missing } in compound statement note: { opened at line

The minify code delete some " { " on Js code, is there any solution the fix this problem?

After some search, I found that the error is in JS comments, when I minify the HTML code the comments concatenate with the code.

I try to use this regex

/\/\*[\s\S]*?\*\/|([^:]|^)\/\/.*$/ 

but it's doesn't work

Answer 1

Like you say, when you Minify your code using the function, all the HTML code be in single line, for that any code after a JS comments well be a comment to. So You can use this PHP regex to remove inline JavaScript comment :

Your new function :

 public static function sanitize_output($buffer) {

        $search = array(
            '#^\s*//.+$#m', //remove JS comment,
            '/ {2,}/',
            '/<!--.*?-->|\t|(?:?
[ \t]*)+/s'
        );
        $replace = array(
            '',
            ' ',
            ''
        );
        $buffer = preg_replace($search, $replace, $buffer);

        return $buffer;
    }