My concern is to extract links from a div using php html dom library.
code exemple :
include["simple_html_dom.php"];
$html='
';
I need to fetch all domains names from a div then store them in a php array using simple html dom parser exemple :
domaine.com,domaine.info,domaine.org,domaine.net,domaine.biz,domaine.fr
Thank you.
asked Jun 11, 2015 at 12:39
3
include["simple_html_dom.php"];
$html='
';
$str_html=str_get_html[$html];
// $file_html=file_get_html[$html]; // use file_get_html if you parse an url.
$div=$str_html->find["div#base"];
$count=count[$div]-1;
for[$a=0;$afind["div#base",$a]->getAttribute['url-data'];
$parse = parse_url[$url];
$domain = $parse['host'];
$array[]=$domain;
}
print_r[$array];
answered Jun 11, 2015 at 12:57
AnassAnass
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HTML5 is designed with extensibility in mind for data that should be associated with a particular element but need not have any defined meaning. The syntax is simple. Any attribute on any element whose attribute name starts with data-* attributes allow us to store extra information on standard, semantic HTML elements without other
hacks such as non-standard attributes, or extra properties on DOM.HTML syntax
data- is a data attribute. Say you have an article and you want to store some extra information that
doesn't have any visual representation. Just use data attributes for that:
…
JavaScript access
Reading the values of these attributes out in
JavaScript is also very simple. You could use getAttribute[] with their full HTML name to read them, but the standard defines a simpler way: a DOMStringMap you can read out via a
dataset property.
To get a data attribute through the dataset object, get the property by the part of the attribute name after data- [note that dashes are converted to camelCase].
const article = document.querySelector["#electric-cars"];
// The following would also work:
// const article = document.getElementById["electric-cars"]
article.dataset.columns; // "3"
article.dataset.indexNumber; // "12314"
article.dataset.parent; // "cars"
Each property is a string and can be read and written. In the above case setting article.dataset.columns = 5 would change that attribute to "5".
CSS access
Note that, as data attributes are plain HTML attributes, you can even access them from CSS. For example to show the parent data on the article you can use
generated content in CSS with the attr[] function:
article::before {
content: attr[data-parent];
}
You can also use the attribute selectors in CSS to change styles according to the data:
article[data-columns="3"] {
width: 400px;
}
article[data-columns="4"] {
width: 600px;
}
You can see all this working together in this JSBin example.
Data attributes can also be stored to contain information that is constantly changing, like scores in a game. Using the CSS selectors and JavaScript access here this allows you to build some nifty effects without having to write your own display routines. See this screencast for an example using generated content and CSS transitions [JSBin example].
Data values are strings. Number values must be quoted in the selector for the styling to take effect.
Issues
Do not store content that should be visible and accessible in data attributes, because assistive technology may not access them. In addition, search crawlers may not index data attributes' values.
The main issues to consider are Internet Explorer support and performance. Internet Explorer 11+ provides support for the standard, but all earlier versions do not support dataset. To support IE 10 and under you need to access data attributes with getAttribute[] instead. Also, the performance of reading data-* attributes compared to storing the data in a regular JavaScript object is poor.
That said, though, for custom element-associated metadata, they are a great solution.
In Firefox 49.0.2 [and perhaps earlier/later versions], the data attributes that exceed 1022 characters will not be read by JavaScript [ECMAScript 4].
See also
- This article is adapted from Using data attributes in JavaScript and CSS on hacks.mozilla.org.
- Custom
attributes are also supported in SVG 2; see
SVGElement.datasetanddata-*for more information. - How to use HTML data attributes [Sitepoint]