php遍历解析xml字符串的方法phpsoapxml解析php解析xml数据php如何解析xm

<?php
$content = <<<xml <?xml="" version="1.0" encoding="UTF-8" ?="">
<test>
  <global_setting>
    <ping_protocol>HTTP</ping_protocol>
    <ping_port>80</ping_port>
    <ping_path>/index.html</ping_path>
    <response_timeout>5000</response_timeout>
    <health_check_interval>3000</health_check_interval>
    <unhealthy_threshold>2</unhealthy_threshold>
    <healthy_threshold>3</healthy_threshold>
  </global_setting>
  <instances>
    <instance ip="192.168.234.121">
    <instance ip="192.168.234.28">
  </instance></instance></instances>
</test>
XML;
$test = new SimpleXMLElement($content);
//获得ping_protocol的值
$ping_protocol = $test->global_setting->ping_protocol;
echo "ping_protocol : $ping_protocol \n";
//打印出所有instance的IP
foreach ( $test->instances->instance as $instance) {
  echo "IP: {$instance['ip']} \n" ;
}
//这里经过测试,发现使用var_dump之类的似乎不能有效</xml>