本文實(shí)例總結(jié)了PHP讀取XML格式文件的方法。分享給大家供大家參考，具體如下：
books.xml文件：
<books> <book> <author>Jack Herrington</author> <title>PHP Hacks</title> <publisher>O'Reilly</publisher> </book> <book> <author>Jack Herrington</author> <title>Podcasting Hacks</title> <publisher>O'Reilly</publisher> </book> </books>
1.DOMDocument方法
<?php
$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 "<br>";
}
?>
2.用 SAX 解析器讀取 XML：
<?php
$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.用正則表達(dá)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到數(shù)組
<?php $data = "<root><line /><content language=\"gb2312\">簡(jiǎn)單的XML數(shù)據(jù)</content></root>"; $parser = xml_parser_create(); //創(chuàng)建解析器 xml_parse_into_struct($parser, $data, $values, $index); //解析到數(shù)組 xml_parser_free($parser); //釋放資源 //顯示數(shù)組結(jié)構(gòu) echo "\n索引數(shù)組\n"; print_r($index); echo "\n數(shù)據(jù)數(shù)組\n"; print_r($values); ?>
5.檢查XML是否有效
<?php
//創(chuàng)建XML解析器
$xml_parser = xml_parser_create();
//使用大小寫(xiě)折疊來(lái)保證能在元素?cái)?shù)組中找到這些元素名稱(chēng)
xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, true);
//讀取XML文件
$xmlfile = "bb.xml";
if (!($fp = fopen($xmlfile, "r")))
{
die("無(wú)法讀取XML文件$xmlfile");
}
//解析XML文件
$has_error = false; //標(biāo)志位
while ($data = fread($fp, 4096))
{
//循環(huán)地讀入XML文檔，只到文檔的EOF，同時(shí)停止解析
if (!xml_parse($xml_parser, $data, feof($fp)))
{
$has_error = true;
break;
}
}
if($has_error)
{
echo "該XML文檔是錯(cuò)誤的！<br />";
//輸出錯(cuò)誤行，列及其錯(cuò)誤信息
$error_line = xml_get_current_line_number($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 $message;
}
else
{
echo "該XML文檔是結(jié)構(gòu)良好的。";
}
//關(guān)閉XML解析器指針，釋放資源
xml_parser_free($xml_parser);
?>
6.可用于精確的讀取XML
test.xml
<?xml version="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常年供應(yīng)苗木，品種有玉蘭、黃葉楊等。聯(lián)系人：張三，電話(huà)：1234567890。</MESSAGE>
<LONG_CODE>100</LONG_CODE>
<SERVICE_CODE>9588</SERVICE_CODE>
</SBMP_MO_MESSAGE>
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