&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$delta</span><span style="color: #007700">=</span><span style="color: #0000BB">$now</span><span style="color: #007700">-</span><span style="color: #0000BB">$last</span><span style="color: #007700">[</span><span style="color: #0000BB">3</span><span style="color: #007700">];<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$token</span><span style="color: #007700">=</span><span style="color: #