一般来说国家列表非常长的，在客户端一般不使用连接数据库来读取数据的国家列表。这不仅消耗内存而且让页面加载速度也变慢，为此把国家列表存在XML中是一个很好的选择。
部分XML数据：data/countries.xml，列表太长，完整的放在附件中。
<?xml version="1.0" encoding="utf-8"?>
<countries>
<region id="1" name="America">
<country id="92" name="Uruguay" code="UY" />
<country id="93" name="Venezuela" code="VE" />
</region>
<region id="2" name="Europe">
<country id="169" name="Ukraine" code="UA" />
<country id="232" name="United Arab Emirates" code="AE" />
<country id="174" name="United Kingdom" code="UK" />
</region>
<region id="3" name="Asia">
<country id="59" name="Turkmenistan" code="TM" />
<country id="65" name="Yemen" code="YE" />
</region>
<region id="4" name="Africa">
<country id="135" name="Nigeria" code="NG" />
<country id="125" name="Rwanda" code="RW" />
<country id="117" name="Zimbabwe" code="ZW" />
</region>
<country id="149" name="Papua New Guinea" code="PG" />
<country id="152" name="Samoa" code="WS" />
<country id="155" name="Tonga" code="TO" />
<country id="156" name="Vanuatu" code="VU" />
</region>
</countries>
PHP函数及调用方法：index.php
function get_country_select($xml, $sele=0,$type='id'){
if(!file_exists($xml)) return 'File not exists';
$country_xml = simplexml_load_file($xml);
$list = '';
foreach($country_xml->children() as $region){
$list .= "<optgroup label=\"---".$region['name']."---\">\n";
foreach($region->children() as $country){
$country_id = $country['id'];
$country_name = $country['name'];
$list.='<option value="';
if($type == 'id'){
$list .= $country_id.'"';
if($sele == $country_id) $list.= ' selected';
}else{
$list.= $country_name.'"';
if($sele == $country_name) $list.= ' selected';
}
$list .= '>'.$country_name."</option>\n";
}
$list .= "</optgroup>\n";
}
return $list;
}
$xml = './data/countries.xml';
$list = get_country_select($xml);
echo '<select id=country>';
echo $list;
echo '</select>';
为什么要把