PHP读取XML格式文件的方法总结
本文实例总结了PHP读取XML格式文件的方法。分享给大家供大家参考，具体如下：
books.xml文件：
<books> <book> <author>JackHerrington</author> <title>PHPHacks</title> <publisher>O'Reilly</publisher> </book> <book> <author>JackHerrington</author> <title>PodcastingHacks</title> <publisher>O'Reilly</publisher> </book> </books>
1.DOMDocument方法
<?php
$doc=newDOMDocument();
$doc->load('books.xml');
$books=$doc->getElementsByTagName("book");
foreach($booksas$book)
{
$authors=$book->getElementsByTagName("author");
$author=$authors->item(0)->nodeValue;
$publishers=$book->getElementsByTagName("publisher");
$publisher=$publishers->item(0)->nodeValue;
$titles=$book->getElementsByTagName("title");
$title=$titles->item(0)->nodeValue;
echo"$title-$author-$publisher\n";
echo"<br>";
}
?>
2.用SAX解析器读取XML：
<?php
$g_books=array();
$g_elem=null;
functionstartElement($parser,$name,$attrs)
{
global$g_books,$g_elem;
if($name=='BOOK')$g_books[]=array();
$g_elem=$name;
}
functionendElement($parser,$name)
{
global$g_elem;
$g_elem=null;
}
functiontextData($parser,$text)
{
global$g_books,$g_elem;
if($g_elem=='AUTHOR'||
$g_elem=='PUBLISHER'||
$g_elem=='TITLE')
{
$g_books[count($g_books)-1][$g_elem]=$text;
}
}
$parser=xml_parser_create();
xml_set_element_handler($parser,"startElement","endElement");
xml_set_character_data_handler($parser,"textData");
$f=fopen('books.xml','r');
while($data=fread($f,4096))
{
xml_parse($parser,$data);
}
xml_parser_free($parser);
foreach($g_booksas$book)
{
echo$book['TITLE']."-".$book['AUTHOR']."-";
echo$book['PUBLISHER']."\n";
}
?>
3.用正则表达式解析XML：
<?php
$xml="";
$f=fopen('books.xml','r');
while($data=fread($f,4096)){
$xml.=$data;
}
fclose($f);
preg_match_all("/\<book\>(.*?)\<\/book\>/s",$xml,$bookblocks);
foreach($bookblocks[1]as$block)
{
preg_match_all("/\<author\>(.*?)\<\/author\>/",$block,$author);
preg_match_all("/\<title\>(.*?)\<\/title\>/",$block,$title);
preg_match_all("/\<publisher\>(.*?)\<\/publisher\>/",$block,$publisher);
echo($title[1][0]."-".$author[1][0]."-".$publisher[1][0]."\n");
}
?>
4.解析XML到数组
<?php $data="<root><line/><contentlanguage=\"gb2312\">简单的XML数据</content></root>"; $parser=xml_parser_create();//创建解析器 xml_parse_into_struct($parser,$data,$values,$index);//解析到数组 xml_parser_free($parser);//释放资源 //显示数组结构 echo"\n索引数组\n"; print_r($index); echo"\n数据数组\n"; print_r($values); ?>
5.检查XML是否有效
<?php
//创建XML解析器
$xml_parser=xml_parser_create();
//使用大小写折叠来保证能在元素数组中找到这些元素名称
xml_parser_set_option($xml_parser,XML_OPTION_CASE_FOLDING,true);
//读取XML文件
$xmlfile="bb.xml";
if(!($fp=fopen($xmlfile,"r")))
{
die("无法读取XML文件$xmlfile");
}
//解析XML文件
$has_error=false;//标志位
while($data=fread($fp,4096))
{
//循环地读入XML文档，只到文档的EOF，同时停止解析
if(!xml_parse($xml_parser,$data,feof($fp)))
{
$has_error=true;
break;
}
}
if($has_error)
{
echo"该XML文档是错误的！<br/>";
//输出错误行，列及其错误信息
$error_line=xml_get_current_line_number($xml_parser);
$error_row=xml_get_current_column_number($xml_parser);
$error_string=xml_error_string(xml_get_error_code($xml_parser));
$message=sprintf("［第%d行，%d列］：%s",
$error_line,
$error_row,
$error_string);
echo$message;
}
else
{
echo"该XML文档是结构良好的。";
}
//关闭XML解析器指针，释放资源
xml_parser_free($xml_parser);
?>
6.可用于精确的读取XML
test.xml
<?xmlversion="1.0"encoding="UTF-8"?> <SBMP_MO_MESSAGE> <CONNECT_ID>100</CONNECT_ID> <MO_MESSAGE_ID>123456</MO_MESSAGE_ID> <RECEIVE_DATE>20040605</RECEIVE_DATE> <RECEIVE_TIME>153020</RECEIVE_TIME> <GATEWAY_ID>1</GATEWAY_ID> <VALID>1</VALID> <CITY_CODE>010</CITY_CODE> <CITY_NAME>北京</CITY_NAME> <STATE_CODE>010</STATE_CODE> <STATE_NAME>北京</STATE_NAME> <TP_PID>0</TP_PID> <TP_UDHI>0</TP_UDHI> <MSISDN>15933626501</MSISDN> <MESSAGE_TYPE>8</MESSAGE_TYPE> <MESSAGE>5618常年供应苗木，品种有玉兰、黄叶杨等。联系人：张三，电话：1234567890。</MESSAGE> <LONG_CODE>100</LONG_CODE> <SERVICE_CODE>9588</SERVICE_CODE> </SBMP_MO_MESSAGE>
test.php:
<?php
$myData=array();
$file=file_get_contents("test.xml");
if(strpos($file,'<?xml')>-1){
try{
//加载解析xml
$xml=simplexml_load_string($file);
if($xml){
//echo$this->result;
//获取节点值
$CONNECT_ID=$xml->CONNECT_ID;
$MO_MESSAGE_ID=$xml->MO_MESSAGE_ID;
$RECEIVE_DATE=$xml->RECEIVE_DATE;
$RECEIVE_TIME=$xml->RECEIVE_TIME;
$GATEWAY_ID=$xml->GATEWAY_ID;
$VALID=$xml->VALID;
$CITY_CODE=$xml->CITY_CODE;
$CITY_NAME=$xml->CITY_NAME;
$STATE_CODE=$xml->CITY_CODE;
$STATE_NAME=$xml->STATE_NAME;
$TP_PID=$xml->TP_PID;
$TP_UDHI=$xml->TP_UDHI;
$MSISDN=$xml->MSISDN;
$MESSAGE_TYPE=$xml->MESSAGE_TYPE;
$MESSAGE=$xml->MESSAGE;//短信
$LONG_CODE=$xml->LONG_CODE;
$SERVICE_CODE=$xml->SERVICE_CODE;
preg_match("/(561)\d{1,2}/",$MESSAGE,$code);
switch($code[0]){
case5618:
$myData[message]=$MESSAGE;
break;
default:
$myData[]='没有短消息。';
break;
}
}else{
echo"加载xml文件错误。";
}
}catch(exception$e){
print_r($e);
}
}else{
echo"没有该XML文件。";
}
echo"<pre>";
print_r($myData);
echo"<hr>";
echo$myData[message];
?>
PS：这里再为大家提供几款关于xml操作的在线工具供大家参考使用：
在线