07700">public&nbsp;function&nbsp;</span><span style="color: #0000BB">next</span><span style="color: #007700">()<br />{<br />&nbsp;&nbsp;&nbsp;&nbsp;do<br />&nbsp;&nbsp;&nbsp;&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$this</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">_key</span><span style="color: #007700">=</span><span style="color: #0000BB">next</span><span style="color: #007700">(</span><span style="color: #0000BB">$this