DOM XML (PHP 4) 函数
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domxml_open_file

(PHP 4 >= 4.2.0)

domxml_open_file — Creates a DOM object from an XML file

说明

DomDocument domxml_open_file ( string $filename [, int $mode = DOMXML_LOAD_PARSING [, array &$error ]] )

The function parses the XML document in the given file.

参数

filename

The path to the XML file. The file is accessed in read-only mode.

mode

This optional parameter can be used to change the behavior of this function.

You can use one of the following constants for it: DOMXML_LOAD_PARSING (default), DOMXML_LOAD_VALIDATING or DOMXML_LOAD_RECOVERING. You can add to it also DOMXML_LOAD_DONT_KEEP_BLANKS, DOMXML_LOAD_SUBSTITUTE_ENTITIES and DOMXML_LOAD_COMPLETE_ATTRS by bitwise or.

error

If used, it will contain the error messages. error must be passed in by reference.

返回值

Returns a DomDocument instance of the given file.

范例

Example #1 Opening an XML document from a file

<?php

if (!$dom = domxml_open_file("example.xml")) {
  echo "Error while parsing the document\n";
  exit;
}

$root = $dom->document_element();
?>

更新日志

版本 说明
4.3.0 The parameters mode and error were added.

参见

DOM XML (PHP 4) 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Creates a DOM object from an XML file

用户评论:

koms at koms dot ru (03-Mar-2009 07:18)

The way to order the nodes in XML-files by an attribute (desc or asc):

<?php
// open the XML-file
$xml = domxml_open_file("our_file.xml");

// get the root element
$root = $xml->document_element();
// get the list of the nodes
$nodes = $root->child_nodes();

// create the array 'messages' of the nodes
foreach($nodes as $node)
{
 if ($node->node_name() == 'photo')
 {
     $currentMessage['thumbnail'] = $node->get_attribute('thumbnail');
     $currentMessage['filename'] = $node->get_attribute('filename');
     $currentMessage['idnum'] = $picnum[md5($node->get_attribute('filename'))];
     $messages[] = $currentMessage;
 }
}

// sort all the nodes by idnum (asc/desc is "1: -1" or "-1: 1")
$compare_func = create_function('$a, $b', 'return ($a[\'idnum\']==$b[\'idnum\'])? 0: (($a[\'idnum\']>$b[\'idnum\'])? 1: -1);');
usort($messages, $compare_func);

// create the new XML-data
$doc = domxml_new_doc("1.0");
$root = $doc->create_element("photos");
$root = $doc->append_child($root);
for($ee=0;$ee<count($messages);$ee++)
{
    $msgNode = $root->new_child('photo');
    foreach($messages[$ee] as $description => $result)
    {
        $msgNode->set_attribute($description,$result);
    }
}

// write down the XML-file
$text = $doc->dump_mem(true);
$fp = fopen("our_file.xml","w");
fwrite($fp,$text);
fclose($fp);
?>

A-Wing (info at a-wing dot co dot uk) (17-May-2006 07:23)

A very useful undocumented feature if you are opening hundreds of xml docs (my script processes 20,000) is DomDocument->free.
This clears the allocated the memory used by the xml file which is not done automatically by just opening a new file on the same variable.

Example:

<?
$dir="/path/to/xml/files/";
if ($dh = opendir($dir)) {
    while (($file = readdir($dh)) !== false) {
        if(is_file($dir.$file))
        {
            echo $file . "\\n";
            $dom=domxml_open_file($dir.$file);

            #...
            #You xml processor here
            #...
            $dom->free();
        }
    }
    closedir($dh);
}

?>

noyanoya at tin dot it (28-Dec-2005 05:47)

another way to resolve path's problem is to use  realpath() function
for example:

<?php
$file=$_REQUEST['file'];
$xmlPath = realpath("../xml/");
$fileXML ="$file";
  if(!$dom = domxml_open_file($xmlPath."/".$fileXML)) {
    echo "error opening the file";
    exit;
}
?>

N.B. you have to put the final slash ( / ) beetween path and file name!

php at gungfu [dot] de (19-Mar-2005 04:13)

For me, on Windows XP, the solution with  file_get_contents works, the one with domxml_open_file does not. It seems the latter caches the loaded file. Quite confusing.

contact at richardleggett dot co dot uk (14-Feb-2005 10:00)

If you want to work on both Windows and Linux, I found appending the following to the front of your file path works:

$xmlPath = dirname(__FILE__) . "/";
$xmlDOM = domxml_open_file($xmlPath . "file.xml");

(rather than the "\\" in a previous post on this page which only works on Windows).

This should get around the I/O errors.

info at sgonda dot de (30-Oct-2003 09:02)

You can load your own DTD's within your XML Doc like this:

<?php
$domxml = domxml_open_file('test.xml',DOMXML_LOAD_VALIDATING,$error);
?>

I hope this helps....

The DocumentType Definition (must/have) to be in the Doc root of your Server...

kevin at ieqdev dot com (16-Jun-2003 12:30)

If you're working on a windows machine and don't want to use full paths , just use...

$showfile = file_get_contents($path . "/" . $fileName);

if(!$domDoc = domxml_open_mem($showfile)) {
    echo "Couldn't load xml...";   
    exit;
}

Because file_get_contents() can use relative paths on Win, it keeps your code more portable...

twist

et at wkv dot at (24-Feb-2003 04:49)

domxml documentation is a moving target, for 4.2.3 a working example is:

<?
$xmlpath = dirname(__FILE__) . "\\";
$xmldoc = domxml_open_file( $xmlpath . "test.xml");
$xsldoc = domxml_xslt_stylesheet_file ( $xmlpath . "test.xsl");
$result = $xsldoc->process($xmldoc);
print $result->dump_mem();
?>

RTFS is a working method in this case (lucky guesses work also from time tor time) :-)

andrew at boxuk dot com (07-Feb-2003 01:32)

Using PHP 4.2.3 and Win2K.

The XML file needs to be referenced using the full filesystem path name, even if its in the same directory.

rudolfnospam at redshift dot co dot no dot spam dot za (29-Apr-2002 02:12)

Using PHP 4.1.2, Win2K, IIS.
I found that if the path to the XML source file is too long then the file isn't picked up. I haven't tested it to see how long the path can be or whether this is still an issue in PHP 4.2