PHP实现读取XML格式文件的方法教程

这篇PHP实现读取XML格式文件的方法文主要介绍了PHP读取XML格式文件的方法,结合实例形式总结分析了php针对xml格式文件的读取、解析、加载、遍历等操作技巧,需要的朋友可以来php粉丝网参考下。

具体如下：

books.xml文件：

Jack Herrington

O'Reilly

Jack Herrington

O'Reilly

1.DOMDocument方法

$doc = new DOMDocument();

$doc->load( 'books.xml' );

$books = $doc->getElementsByTagName( "book" );

foreach( $books as $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 "

";

}

?>

2.用 SAX 解析器读取 XML：

$g_books = array();

$g_elem = null;

function startElement( $parser, $name, $attrs )

{

global $g_books, $g_elem;

if ( $name == 'BOOK' ) $g_books []= array();

$g_elem = $name;

}

function endElement( $parser, $name )

{

global $g_elem;

$g_elem = null;

}

function textData( $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_books as $book )

{

echo $book['TITLE']." - ".$book['AUTHOR']." - ";

echo $book['PUBLISHER']."\n";

}

?>

3.用正则表达式解析 XML：

$xml = "";

$f = fopen( 'books.xml', 'r' );

while( $data = fread( $f, 4096 ) ) {

$xml .= $data;

}

fclose( $f );

preg_match_all( "/\(.*?)\<\/book\>/s", $xml, $bookblocks );

foreach( $bookblocks[1] as $block )

{

preg_match_all( "/\(.*?)\<\/author\>/", $block, $author );

preg_match_all( "/\(.*?)\<\/title\>/",  $block, $title );

preg_match_all( "/\(.*?)\<\/publisher\>/", $block, $publisher );

echo( $title[1][0]." - ".$author[1][0]." - ".$publisher[1][0]."\n" );

}

?>

4.解析XML到数组

$data = "简单的XML数据";

$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

//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！

";

//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

$myData = array();

$file = file_get_contents("test.xml");

if(strpos($file, ' -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]) {

case 5618 :

$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 "

";

print_r($myData);

echo "

";

echo $myData[message];

?>

以上就本文的全部使用教程方法，希望对你有所帮助。