本文實(shí)例講述了php遍歷解析xml字符串的方法。分享給大家供大家參考，具體如下：

<?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"/>

  </instances>

</test>

XML;

$test = new SimpleXMLElement($content);

//獲得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" ;

}

//這里經(jīng)過測試,發(fā)現(xiàn)使用var_dump之類的似乎不能有效輸出值,用echo比較順利,

//還有就是上面的那個(gè)xml的例子可以去掉<?xml version="1.0" encoding="UTF-8"?> 

//也可以去掉頭尾///的<<<xml,然后當(dāng)做普通字符串那樣對待,但是沒有測試中文等

希望本文所述對大家PHP程序設(shè)計(jì)有所幫助。