<span style="color: #0000BB"></span><span style="color: #007700">protected&nbsp;function&nbsp;</span><span style="color: #0000BB">displayCallstack</span><span style="color: #007700">(</span><span style="color: #0000BB">$logs</span><span style="color: #007700">)<br />{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$stack</span><span style="color: #007700">=array();<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$level</span><span style="color: #007700">=</span><span style