简单范例
<?phpinclude "simple_html_dom.php" ;
// Create DOM from URL or file
$html = file_get_html('http://www.google.com/');
// Find all images
foreach($html->find('img') as $element)
echo $element->src . '<br>';
// Find all links
foreach($html->find('a') as $element)
echo $element->href . '<br>';
// Create DOM from URL
$html = file_get_html('http://slashdot.org/');
// Find all article blocks
foreach($html->find('div.article') as $article) {
$item['title'] = $article->find('div.title', 0)->plaintext;
$item['intro'] = $article->find('div.intro', 0)->plaintext;
$item['details'] = $article->find('div.details', 0)->plaintext;
$articles[] = $item;
}
print_r($articles);
// Create DOM from string
$html = str_get_html('<div id="hello">Hello</div><div id="world">World</div>');
$html->find('div', 1)->class = 'bar';
$html->find('div[id=hello]', 0)->innertext = 'foo';
echo $html; // Output: <div id="hello">foo</div><div id="world" class="bar">World</div>
3.DOM的方法
$html =
file_get_html
(
'http://www.google.com/'
); //
$html 所拥有的方法如下表所示
$html->clear() ; //
调用方法
DOM
methods & properties
| Name | Description |
|---|
|
void
__construct ( [string $filename] ) | Constructor, set the filename parameter will automatically load the contents, either text or file/url. |
|
string
plaintext | Returns the contents extracted from HTML. |
|
void
clear () | Clean up memory. |
|
void
load ( string $content ) | Load contents from a string. |
|
string
save ( [string $filename] ) | Dumps the internal DOM tree back into a string. If the $filename is set, result string will save to file. |
|
void
load_file ( string $filename ) | Load contents from a from a file or a URL. |
|
void
set_callback ( string $function_name ) | Set a callback function. |
|
mixed
find ( string $selector [, int $index] ) | Find elements by the CSS selector. Returns the Nth element object if index is set, otherwise return an array of object. |
4.find 方法详细介绍
find ( string $selector [, int $index] )
// Find all anchors, returns a array of element objects
$ret = $html->find(
'a'
);
// Find (N)th anchor, returns element object or null if not found
(zero based)
$ret = $html->find(
'a', 0
);
// Find lastest anchor, returns element object or null if not found
(zero based)
$ret = $html->find(
'a', -1
);
// Find all <div> with the id attribute
$ret = $html->find(
'div[id]'
);
// Find all <div> which attribute id=foo
$ret = $html->find(
'div[id=foo]'
);
// Find all element which id=foo
$ret = $html->find(
'#foo'
);
// Find all element which class=foo
$ret = $html->find(
'.foo'
);
// Find all element has attribute id
$ret = $html->find(
'*[id]'
);
// Find all anchors and images
$ret = $html->find(
'a, img'
);
// Find all anchors and images with the "title" attribute
$ret = $html->find(
'a[title], img[title]'
);
// Find all <li> in <ul>
$es = $html->find(
'ul li'
);
// Find Nested <div>
tags
$es = $html->find(
'div div div'
);
// Find all <td> in <table> which class=hello
$es = $html->find(
'table.hello td'
);
// Find all td tags with attribite align=center in table tags
$es = $html->find(
''table td[align=center]'
);
5. Element 的方法
$e = $html->find(
"div"
,
0
); //
$e 所拥有的方法如下表所示
| Attribute Name | Usage |
|---|
| $e->tag | Read or write the tag name of element. |
| $e->outertext | Read or write the outer HTML text of element. |
| $e->innertext | Read or write the inner HTML text of element. |
| $e->plaintext | Read or write the plain text of element. |
// Example
$
html =
str_get_html
(
"<div>foo <b>bar</b></div>"
)
;
$e = $html->find(
"div"
,
0
);
echo $e->
tag
;
// Returns: " div"
echo $e->
outertext
;
// Returns: " <div>foo <b>bar</b></div>"
echo $e->
innertext
;
// Returns: " foo <b>bar</b>"
echo $e->
plaintext
;
// Returns: " foo bar"
6.DOM traversing 方法
| Method | Description |
|---|
|
mixed
$e->children ( [int $index] ) | Returns the Nth child object if index is set, otherwise return an array of children. |
|
element
$e->parent () | Returns the parent of element. |
|
element
$e->first_child () | Returns the first child of element, or null if not found. |
|
element
$e->last_child () | Returns the last child of element, or null if not found. |
|
element
$e->next_sibling () | Returns the next sibling of element, or null if not found. |
|
element
$e->prev_sibling () | Returns the previous sibling of element, or null if not found. |
// Example
echo $html->
find
(
"#div1", 0
)->
children
(
1
)->
children
(
1
)->
children
(
2
)->
id
;
// or
echo $html->
getElementById
(
"div1"
)->
childNodes
(
1
)->
childNodes
(
1
)->
childNodes
(
2
)->
getAttribute
(
'id'
);
附带： DOM方法
set_callback
(
'my_callback'
) 使用方法
// Write a function with parameter "$element"
function my_callback(
$element
) {
// Hide all <b> tags
if ($element->tag==
'b'
)
$element->outertext = '';
}
// Register the callback function with it's function name
$html->
set_callback
(
'my_callback'
);
// Callback function will be invoked while dumping
echo $html;
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