Use a dollar sign $ cashtag as well as a hashtag # [closed]

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Closed 5 years ago.

Ok I'm looking to use both dollar sign $ (cashtag) and a Hashtag # for the following code. The code below is what I've attempted to use...

This is the ORIGINAL CODE:

// Hashtags and @Mentions
        $str = preg_replace_callback('~([#@])([^\s#@]+)~',
        create_function('$m', '$dir = $m[1] == "#" ? "search/?q=%23" : "./";' .
        'return "<a href=\"$dir$m[2]\">$m[0]</a>";' ),
        $str );
        /* Link text */
        $str = self :: linkText( $str );
        /* Emoticons */
        $str = self :: emoticons( $str );
        $str = stripslashes( $str );
        //$str = str_replace( '&lt;br /&gt;', '<br />', $str );

        //return wordwrap( $str, 60, "\r\n", TRUE );
        return $str;
    }

This is my EDITED VERSION:

// Hashtags and @Mentions
        $str = preg_replace_callback('~([#@$])([^\s#@$]+)~',
        create_function('$m', '$dir = $m[1] == "#" ? "search/?q=%23,%24" : "./";' .
        'return "<a href=\"$dir$m[2]\">$m[0]</a>";' ),
        $str );
/* Link text */
        $str = self :: linkText( $str );
/* Emoticons */
        $str = self :: emoticons( $str );
        $str = stripslashes( $str );
        //$str = str_replace( '&lt;br /&gt;', '<br />', $str );

        //return wordwrap( $str, 60, "\r\n", TRUE );
        return $str;
    }

I added the "$" and the %24 to the above code... the thing is that the "original" code works properly and produces a URL like this: example.com/search/?q=#myhashtag

BUT with my edited code it shows a URL like this: example.com/myhashtag

How is it possible to have both "#" and "$" function like the original code and produce two URLs like this:

example.com/search/?q=#myhashtag

example.com/search/?q=$mycashtag

Answer 1

An unescaped $ symbol in a regular expression will anchor to the end of the input string. To match a literal $ you have to escape it with a backslash