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PHP读写XML的实例

已有 232 次阅读2008-4-2 14:15 |个人分类:PHP

建立一个   data.xml   文件，内容：
<NewDataSet>
      <Login>
          <User_ID>001</User_ID>
          <User_Cname>用户1</User_Cname>
      </Login>
      <Login>
          <User_ID>009</User_ID>
          <User_Cname>用户2</User_Cname>
      </Login>
</NewDataSet>
---------------------------------------------------------------
PHP   代码：
<?php
$file   =   "data.xml";
$currentTag   =   "";
$user_id   =   "";
$user_cname   =   "";
$users   =   array();
function   startElement($parser,   $name,   $attrs)   {
global   $currentTag;
          $currentTag   =   $name;
}
function   endElement($parser,   $name)   {
          global   $users,   $user_id,   $user_cname;

          if(strcmp($name,   "LOGIN")   ==   0)   {
          $user_id   =   trim("$user_id");
          $user_cname   =   trim("$user_cname");

          $users[]   =   array("USER_ID"   =>   $user_id,   "USER_CNAME"   =>   $user_cname);

          $user_id   =   "";
          $user_cname   =   "";
          }
}
function   characterData($parser,   $data)   {
global   $currentTag,   $user_id,   $user_cname;

switch   ($currentTag)   {
case "USER_ID":
$user_id   .=   $data;
break;
case "USER_CNAME":
$user_cname   .=   $data;
break;
default :
}
}
function   readUserInfo()   {
global   $file,   $users;

$xml_parser   =   xml_parser_create();
xml_parser_set_option($xml_parser,   XML_OPTION_CASE_FOLDING,   true);
xml_set_element_handler($xml_parser,   "startElement",   "endElement");
xml_set_character_data_handler($xml_parser,   "characterData");

if   (!($fp   =   fopen($file,   "r")))   {
          die("could   not   open   XML   input");
}

while   ($data   =   fread($fp,   4096))   {
          if   (!xml_parse($xml_parser,   $data,   feof($fp)))   {
                  die(sprintf("XML   error:   %s   at   line   %d",
                                          xml_error_string(xml_get_error_code($xml_parser)),
                                          xml_get_current_line_number($xml_parser)));
          }
}

xml_parser_free($xml_parser);
return   $users;
}
function   printUserInfo($user_id,   $user_cname)   {
print   "<tr   height='21'>";
print   "<td>$user_id</td>";
print   "<td>$user_cname</td>";
print   "</tr>";
}
?>
<html>
<head>
<title>User   Infomation</title>
</head>
<body>
<table   border="1">
<tr   height="21"   align="center">
<td   width="80"   bgcolor="#EEEEEE">User   ID</td>
<td   width="100"   bgcolor="#EEEEEE">User   NAME</td>
</tr>
<?php
$users   =   readUserInfo();
$num_rows   =   count($users);
for($i   =   0;   $i   <   $num_rows;   $i++)   {
printUserInfo($users[$i]["USER_ID"],   $users[$i]["USER_CNAME"]);
}
?>
</table>
</body>
</html>