本文实例讲述了PHP解析xml格式数据工具类。分享给大家供大家参考，具体如下：

class ome_xml {

/**

* xml资源

*

* @var resource

* @see xml_parser_create()

*/

public $parser;

/**

* 资源编码

*

* @var string

*/

public $srcenc;

/**

* target encoding

*

* @var string

*/

public $dstenc;

/**

* the original struct

*

* @access private

* @var array

*/

public $_struct = array();

/**

* Constructor

*

* @access public

* @param mixed [$srcenc] source encoding

* @param mixed [$dstenc] target encoding

* @return void

* @since

*/

function SofeeXmlParser($srcenc = null, $dstenc = null) {

$this->srcenc = $srcenc;

$this->dstenc = $dstenc;

// initialize the variable.

$this->parser = null;

$this->_struct = array();

}

/**

* Parses the XML file

*

* @access public

* @param string [$file] the XML file name

* @return void

* @since

*/

function xml2array($file) {

//$this->SofeeXmlParser('utf-8');

$data = file_get_contents($file);

$this->parseString($data);

return $this->getTree();

}

function xml3array($file){

$data = file_get_contents($file);

$this->parseString($data);

return $this->_struct;

}

/**

* Parses a string.

*

* @access public

* @param string data XML data

* @return void

*/

function parseString($data) {

if ($this->srcenc === null) {

$this->parser = xml_parser_create();

} else {

if($this->parser = xml_parser_create($this->srcenc)) {

return 'Unable to create XML parser resource with '. $this->srcenc .' encoding.';

}

}

if ($this->dstenc !== null) {

@xml_parser_set_option($this->parser, XML_OPTION_TARGET_ENCODING, $this->dstenc) or die('Invalid target encoding');

}

xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0); // lowercase tags

xml_parser_set_option($this->parser, XML_OPTION_SKIP_WHITE, 1); // skip empty tags

if (!xml_parse_into_struct($this->parser, $data, $this->_struct)) {

/*printf("XML error: %s at line %d",

xml_error_string(xml_get_error_code($this->parser)),

xml_get_current_line_number($this->parser)

);*/

$this->free();

return false;

}

$this->_count = count($this->_struct);

$this->free();

}

/**

* return the data struction

*

* @access public

* @return array

*/

function getTree() {

$i = 0;

$tree = array();

$tree = $this->addNode(

$tree,

$this->_struct[$i]['tag'],

(isset($this->_struct[$i]['value'])) ? $this->_struct[$i]['value'] : '',

(isset($this->_struct[$i]['attributes'])) ? $this->_struct[$i]['attributes'] : '',

$this->getChild($i)

);

unset($this->_struct);

return $tree;

}

/**

* recursion the children node data

*

* @access public

* @param integer [$i] the last struct index

* @return array

*/

function getChild(&$i) {

// contain node data

$children = array();

// loop

while (++$i < $this->_count) {

// node tag name

$tagname = $this->_struct[$i]['tag'];

$value = isset($this->_struct[$i]['value']) ? $this->_struct[$i]['value'] : '';

$attributes = isset($this->_struct[$i]['attributes']) ? $this->_struct[$i]['attributes'] : '';

switch ($this->_struct[$i]['type']) {

case 'open':

// node has more children

$child = $this->getChild($i);

// append the children data to the current node

$children = $this->addNode($children, $tagname, $value, $attributes, $child);

break;

case 'complete':

// at end of current branch

$children = $this->addNode($children, $tagname, $value, $attributes);

break;

case 'cdata':

// node has CDATA after one of it's children

$children['value'] .= $value;

break;

case 'close':

// end of node, return collected data

return $children;

break;

}

}

//return $children;

}

/**

* Appends some values to an array

*

* @access public

* @param array [$target]

* @param string [$key]

* @param string [$value]

* @param array [$attributes]

* @param array [$inner] the children

* @return void

* @since

*/

function addNode($target, $key, $value = '', $attributes = '', $child = '') {

if (!isset($target[$key]['value']) && !isset($target[$key][0])) {

if ($child != '') {

$target[$key] = $child;

}

if ($attributes != '') {

foreach ($attributes as $k => $v) {

$target[$key][$k] = $v;

}

}

$target[$key]['value'] = $value;

} else {

if (!isset($target[$key][0])) {

// is string or other

$oldvalue = $target[$key];

$target[$key] = array();

$target[$key][0] = $oldvalue;

$index = 1;

} else {

// is array

$index = count($target[$key]);

}

if ($child != '') {

$target[$key][$index] = $child;

}

if ($attributes != '') {

foreach ($attributes as $k => $v) {

$target[$key][$index][$k] = $v;

}

}

$target[$key][$index]['value'] = $value;

}

return $target;

}

/**

* Free the resources

*

* @access public

* @return void

**/

function free() {

if (isset($this->parser) && is_resource($this->parser)) {

xml_parser_free($this->parser);

unset($this->parser);

}

}

}

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：

希望本文所述对大家PHP程序设计有所帮助。