Interpret the practical application of PHP recursive array_PHP tutorial

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<span><strong><font color="#006699"><span class="tag"><?</SPAN><SPAN class=tag-name>php</SPAN></FONT></STRONG><SPAN>        </SPAN></SPAN><LI class=""><SPAN>ignore_user_abort();//连线中断后(例如关闭浏览器)仍然继续执行以下的脚本直到处理完毕。      </SPAN><LI class=alt><SPAN>set_time_limit(0);      </SPAN><LI class=""><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>get_data</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>file_get_contents</FONT></SPAN><SPAN>("php://input");      </SPAN></SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute-value><FONT color=#0000ff>explode</FONT></SPAN><SPAN class=attribute><FONT color=#ff0000>explodeexplodedata</FONT></SPAN><SPAN> = explode("&", $get_data);      </SPAN></SPAN><LI class=""><SPAN>foreach ($explodedata as $</SPAN><SPAN class=attribute><FONT color=#ff0000>key</FONT></SPAN><SPAN> =</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></span></font></strong></span><span> $value)//还原数组      </span>
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<li class="alt"><span>{      </span></li>
<li class=""><span>list($realkey, $realvalue) = explode("=", $value);      </span></li>
<li class="alt"><span>$data[urldecode($realkey)] = urldecode($realvalue);      </span></li>
<li class=""><span>}      </span></li>
<li class="alt"><span>//现在$data数组已经和a.php中的一样了，接下来，就可以根据自己的需要对$data数组进行操作了。      </span></li>
<li class=""><span>//......      </span></li>
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<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span>  </span>
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