直接看代码吧。

复制代码 代码如下:
<?php
define('HDOM_TYPE_ELEMENT', 1);
define('HDOM_TYPE_COMMENT', 2);
define('HDOM_TYPE_TEXT', 3);
define('HDOM_TYPE_ENDTAG', 4);
define('HDOM_TYPE_ROOT', 5);
define('HDOM_TYPE_UNKNOWN', 6);
define('HDOM_QUOTE_DOUBLE', 0);
define('HDOM_QUOTE_SINGLE', 1);
define('HDOM_QUOTE_NO', 3);
define('HDOM_INFO_BEGIN', 0);
define('HDOM_INFO_END', 1);
define('HDOM_INFO_QUOTE', 2);
define('HDOM_INFO_SPACE', 3);
define('HDOM_INFO_TEXT', 4);
define('HDOM_INFO_INNER', 5);
define('HDOM_INFO_OUTER', 6);
define('HDOM_INFO_ENDSPACE',7);

// helper functions
// -----------------------------------------------------------------------------
// get html dom form file
function file_get_html() {
$dom = new simple_html_dom;
$args = func_get_args();
$dom->load(call_user_func_array('file_get_contents', $args), true);
return $dom;
}

// get html dom form string
function str_get_html($str, $lowercase=true) {
$dom = new simple_html_dom;
$dom->load($str, $lowercase);
return $dom;
}

// dump html dom tree
function dump_html_tree($node, $show_attr=true, $deep=0) {
$lead = str_repeat(' ', $deep);
echo $lead.$node->tag;
if ($show_attr && count($node->attr)>0) {
echo '(';
foreach($node->attr as $k=>$v)
echo "[$k]=>\"".$node->$k.'", ';
echo ')';
}
echo "\n";

foreach($node->nodes as $c)
dump_html_tree($c, $show_attr, $deep+1);
}

// get dom form file (dePRecated)
function file_get_dom() {
$dom = new simple_html_dom;
$args = func_get_args();
$dom->load(call_user_func_array('file_get_contents', $args), true);
return $dom;
}

// get dom form string (deprecated)
function str_get_dom($str, $lowercase=true) {
$dom = new simple_html_dom;
$dom->load($str, $lowercase);
return $dom;
}

// simple html dom node
// -----------------------------------------------------------------------------
class simple_html_dom_node {
public $nodetype = HDOM_TYPE_TEXT;
public $tag = 'text';
public $attr = array();
public $children = array();
public $nodes = array();
public $parent = null;
public $_ = array();
private $dom = null;

function __construct($dom) {
$this->dom = $dom;
$dom->nodes[] = $this;
}

function __destruct() {
$this->clear();
}

function __toString() {
return $this->outertext();
}

// clean up memory due to php5 circular references memory leak...
function clear() {
$this->dom = null;
$this->nodes = null;
$this->parent = null;
$this->children = null;
}

// dump node's tree
function dump($show_attr=true) {
dump_html_tree($this, $show_attr);
}

// returns the parent of node
function parent() {
return $this->parent;
}

// returns children of node
function children($idx=-1) {
if ($idx===-1) return $this->children;
if (isset($this->children[$idx])) return $this->children[$idx];
return null;
}

// returns the first child of node
function first_child() {
if (count($this->children)>0) return $this->children[0];
return null;
}

// returns the last child of node
function last_child() {
if (($count=count($this->children))>0) return $this->children[$count-1];
return null;
}

// returns the next sibling of node
function next_sibling() {
if ($this->parent===null) return null;
$idx = 0;
$count = count($this->parent->children);
while ($idx<$count && $this!==$this->parent->children[$idx])
++$idx;
if (++$idx>=$count) return null;
return $this->parent->children[$idx];
}

// returns the previous sibling of node
function prev_sibling() {
if ($this->parent===null) return null;
$idx = 0;
$count = count($this->parent->children);
while ($idx<$count && $this!==$this->parent->children[$idx])
++$idx;
if (--$idx<0) return null;
return $this->parent->children[$idx];
}

// get dom node's inner html
function innertext() {
if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];
if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

$ret = '';
foreach($this->nodes as $n)
$ret .= $n->outertext();
return $ret;
}

// get dom node's outer text (with tag)
function outertext() {
if ($this->tag==='root') return $this->innertext();

// trigger callback
if ($this->dom->callback!==null)
call_user_func_array($this->dom->callback, array($this));

if (isset($this->_[HDOM_INFO_OUTER])) return $this->_[HDOM_INFO_OUTER];
if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

// render begin tag
$ret = $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]]->makeup();

// render inner text
if (isset($this->_[HDOM_INFO_INNER]))
$ret .= $this->_[HDOM_INFO_INNER];
else {
foreach($this->nodes as $n)
$ret .= $n->outertext();
}

// render end tag
if(isset($this->_[HDOM_INFO_END]) && $this->_[HDOM_INFO_END]!=0)
$ret .= '</'.$this->tag.'>';
return $ret;
}

// get dom node's plain text
function text() {
if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];
switch ($this->nodetype) {
case HDOM_TYPE_TEXT: return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);
case HDOM_TYPE_COMMENT: return '';
case HDOM_TYPE_UNKNOWN: return '';
}
if (strcasecmp($this->tag, 'script')===0) return '';
if (strcasecmp($this->tag, 'style')===0) return '';

$ret = '';
foreach($this->nodes as $n)
$ret .= $n->text();
return $ret;
}

function xmltext() {
$ret = $this->innertext();
$ret = str_ireplace('<![CDATA[', '', $ret);
$ret = str_replace(']]>', '', $ret);
return $ret;
}

// build node's text with tag
function makeup() {
// text, comment, unknown
if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

$ret = '<'.$this->tag;
$i = -1;

foreach($this->attr as $key=>$val) {
++$i;

// skip removed attribute
if ($val===null || $val===false)
continue;

$ret .= $this->_[HDOM_INFO_SPACE][$i][0];
//no value attr: nowrap, checked selected...
if ($val===true)
$ret .= $key;
else {
switch($this->_[HDOM_INFO_QUOTE][$i]) {
case HDOM_QUOTE_DOUBLE: $quote = '"'; break;
case HDOM_QUOTE_SINGLE: $quote = '\''; break;
default: $quote = '';
}
$ret .= $key.$this->_[HDOM_INFO_SPACE][$i][1].'='.$this->_[HDOM_INFO_SPACE][$i][2].$quote.$val.$quote;
}
}
$ret = $this->dom->restore_noise($ret);
return $ret . $this->_[HDOM_INFO_ENDSPACE] . '>';
}

// find elements by CSS selector
function find($selector, $idx=null) {
$selectors = $this->parse_selector($selector);
if (($count=count($selectors))===0) return array();
$found_keys = array();

// find each selector
for ($c=0; $c<$count; ++$c) {
if (($levle=count($selectors[0]))===0) return array();
if (!isset($this->_[HDOM_INFO_BEGIN])) return array();

$head = array($this->_[HDOM_INFO_BEGIN]=>1);

// handle descendant selectors, no recursive!
for ($l=0; $l<$levle; ++$l) {
$ret = array();
foreach($head as $k=>$v) {
$n = ($k===-1) ? $this->dom->root : $this->dom->nodes[$k];
$n->seek($selectors[$c][$l], $ret);
}
$head = $ret;
}

foreach($head as $k=>$v) {
if (!isset($found_keys[$k]))
$found_keys[$k] = 1;
}
}

// sort keys
ksort($found_keys);

$found = array();
foreach($found_keys as $k=>$v)
$found[] = $this->dom->nodes[$k];

// return nth-element or array
if (is_null($idx)) return $found;
else if ($idx<0) $idx = count($found) + $idx;
return (isset($found[$idx])) ? $found[$idx] : null;
}

// seek for given conditions
protected function seek($selector, &$ret) {
list($tag, $key, $val, $exp, $no_key) = $selector;

// xpath index
if ($tag && $key && is_numeric($key)) {
$count = 0;
foreach ($this->children as $c) {
if ($tag==='*' || $tag===$c->tag) {
if (++$count==$key) {
$ret[$c->_[HDOM_INFO_BEGIN]] = 1;
return;
}
}
}
return;
}

$end = (!empty($this->_[HDOM_INFO_END])) ? $this->_[HDOM_INFO_END] : 0;
if ($end==0) {
$parent = $this->parent;
while (!isset($parent->_[HDOM_INFO_END]) && $parent!==null) {
$end -= 1;
$parent = $parent->parent;
}
$end += $parent->_[HDOM_INFO_END];
}

for($i=$this->_[HDOM_INFO_BEGIN]+1; $i<$end; ++$i) {
$node = $this->dom->nodes[$i];
$pass = true;

if ($tag==='*' && !$key) {
if (in_array($node, $this->children, true))
$ret[$i] = 1;
continue;
}

// compare tag
if ($tag && $tag!=$node->tag && $tag!=='*') {$pass=false;}
// compare key
if ($pass && $key) {
if ($no_key) {
if (isset($node->attr[$key])) $pass=false;
}
else if (!isset($node->attr[$key])) $pass=false;
}
// compare value
if ($pass && $key && $val && $val!=='*') {
$check = $this->match($exp, $val, $node->attr[$key]);
// handle multiple class
if (!$check && strcasecmp($key, 'class')===0) {
foreach(explode(' ',$node->attr[$key]) as $k) {
$check = $this->match($exp, $val, $k);
if ($check) break;
}
}
if (!$check) $pass = false;
}
if ($pass) $ret[$i] = 1;
unset($node);
}
}

protected function match($exp, $pattern, $value) {
switch ($exp) {
case '=':
return ($value===$pattern);
case '!=':
return ($value!==$pattern);
case '^=':
return preg_match("/^".preg_quote($pattern,'/')."/", $value);
case '$=':
return preg_match("/".preg_quote($pattern,'/')."$/", $value);
case '*=':
if ($pattern[0]=='/')
return preg_match($pattern, $value);
return preg_match("/".$pattern."/i", $value);
}
return false;
}

protected function parse_selector($selector_string) {
// pattern of CSS selectors, modified from mootools
$pattern = "/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-]+)(?:([!*^$]?=)[\"']?(.*?)[\"']?)?\])?([\/, ]+)/is";
preg_match_all($pattern, trim($selector_string).' ', $matches, PREG_SET_ORDER);
$selectors = array();
$result = array();
//print_r($matches);

foreach ($matches as $m) {
$m[0] = trim($m[0]);
if ($m[0]==='' || $m[0]==='/' || $m[0]==='//') continue;
// for borwser grnreated xpath
if ($m[1]==='tbody') continue;

list($tag, $key, $val, $exp, $no_key) = array($m[1], null, null, '=', false);
if(!empty($m[2])) {$key='id'; $val=$m[2];}
if(!empty($m[3])) {$key='class'; $val=$m[3];}
if(!empty($m[4])) {$key=$m[4];}
if(!empty($m[5])) {$exp=$m[5];}
if(!empty($m[6])) {$val=$m[6];}

// convert to lowercase
if ($this->dom->lowercase) {$tag=strtolower($tag); $key=strtolower($key);}
//elements that do NOT have the specified attribute
if (isset($key[0]) && $key[0]==='!') {$key=substr($key, 1); $no_key=true;}

$result[] = array($tag, $key, $val, $exp, $no_key);
if (trim($m[7])===',') {
$selectors[] = $result;
$result = array();
}
}
if (count($result)>0)
$selectors[] = $result;
return $selectors;
}

function __get($name) {
if (isset($this->attr[$name])) return $this->attr[$name];
switch($name) {
case 'outertext': return $this->outertext();
case 'innertext': return $this->innertext();
case 'plaintext': return $this->text();
case 'xmltext': return $this->xmltext();
default: return array_key_exists($name, $this->attr);
}
}

function __set($name, $value) {
switch($name) {
case 'outertext': return $this->_[HDOM_INFO_OUTER] = $value;
case 'innertext':
if (isset($this->_[HDOM_INFO_TEXT])) return $this->_[HDOM_INFO_TEXT] = $value;
return $this->_[HDOM_INFO_INNER] = $value;
}
if (!isset($this->attr[$name])) {
$this->_[HDOM_INFO_SPACE][] = array(' ', '', '');
$this->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_DOUBLE;
}
$this->attr[$name] = $value;
}

function __isset($name) {
switch($name) {
case 'outertext': return true;
case 'innertext': return true;
case 'plaintext': return true;
}
//no value attr: nowrap, checked selected...
return (array_key_exists($name, $this->attr)) ? true : isset($this->attr[$name]);
}

function __unset($name) {
if (isset($this->attr[$name]))
unset($this->attr[$name]);
}

// camel naming conventions
function getAllAttributes() {return $this->attr;}
function getAttribute($name) {return $this->__get($name);}
function setAttribute($name, $value) {$this->__set($name, $value);}
function hasAttribute($name) {return $this->__isset($name);}
function removeAttribute($name) {$this->__set($name, null);}
function getElementById($id) {return $this->find("#$id", 0);}
function getElementsById($id, $idx=null) {return $this->find("#$id", $idx);}
function getElementByTagName($name) {return $this->find($name, 0);}
function getElementsByTagName($name, $idx=null) {return $this->find($name, $idx);}
function parentNode() {return $this->parent();}
function childNodes($idx=-1) {return $this->children($idx);}
function firstChild() {return $this->first_child();}
function lastChild() {return $this->last_child();}
function nextSibling() {return $this->next_sibling();}
function previousSibling() {return $this->prev_sibling();}
}

// simple html dom parser
// -----------------------------------------------------------------------------
class simple_html_dom {
public $root = null;
public $nodes = array();
public $callback = null;
public $lowercase = false;
protected $pos;
protected $doc;
protected $char;
protected $size;
protected $cursor;
protected $parent;
protected $noise = array();
protected $token_blank = " \t\r\n";
protected $token_equal = ' =/>';
protected $token_slash = " />\r\n\t";
protected $token_attr = ' >';
// use isset instead of in_array, performance boost about 30%...
protected $self_closing_tags = array('img'=>1, 'br'=>1, 'input'=>1, 'meta'=>1, 'link'=>1, 'hr'=>1, 'base'=>1, 'embed'=>1, 'spacer'=>1);
protected $block_tags = array('root'=>1, 'body'=>1, 'form'=>1, 'div'=>1, 'span'=>1, 'table'=>1);
protected $optional_closing_tags = array(
'tr'=>array('tr'=>1, 'td'=>1, 'th'=>1),
'th'=>array('th'=>1),
'td'=>array('td'=>1),
'li'=>array('li'=>1),
'dt'=>array('dt'=>1, 'dd'=>1),
'dd'=>array('dd'=>1, 'dt'=>1),
'dl'=>array('dd'=>1, 'dt'=>1),
'p'=>array('p'=>1),
'nobr'=>array('nobr'=>1),
);

function __construct($str=null) {
if ($str) {
if (preg_match("/^http:\/\//i",$str) || is_file($str))
$this->load_file($str);
else
$this->load($str);
}
}
http://</title><meta http-equiv="content-type" content="text/html; charset=UTF-8" /><span style="font-style: italic; color: rgb(238, 29, 36);">'.$pi[0]->children(0)->plaintext.' '.$pi[0]->children(1)->plaintext.'</span>';
}else{
$pi = $pubInfo[1]->find('.left');
$result = $userName.$msgCnt[0]->plaintext.'['.$msgCnt[1]->plaintext.'] <span style="font-style: italic; color: rgb(149, 158, 135);">'.$pi[0]->plaintext.'</span>';
}
echo $result;

?>