/a><br />
<a href="scheme://a.example.com/invalid" ping="http://ping.example.com/ping">scheme:</a>

Ignored anchors and pings:<br />
<a>no href</a><br />
<a href="mailto:a@example.com" ping="mailto:fred@ping.com">mailto:</a><br />
<a href="javascript:hello();" ping="javascript:function("ping.com")">javascript:</a><br />
<a href="scheme://a.example.com/invalid" ping="scheme://ping.example.com">scheme:</a>

Should find multiple ping URLs:<br />
<a href="http://a.example.com/" ping="http://ping.example.com/  h