n style="color: #DD0000">'$a,$b'</span><span style="color: #007700">,</span><span style="color: #DD0000">'return&nbsp;$a[4]&lt;$b[4]?1:0;'</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">usort</span><span style="color: #007700">(</span><span style="color: #0000BB">$entries</span><span style="color: #007700">,</span><span style="color: #0000BB">$func</span><span style="color: #007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000