i get the html from another site with file_get_contens, my question is how can i get a specific tag value?
let's say i have:
<div id="global"><p class="paragraph">1800</p></div>
how can i get paragraph's value? thanks
4 Answers
If the example is really that trivial you could just use a regular expression. For generic HTML parsing though, PHP has DOM support:
$dom = new domDocument();
$dom->loadHTML("<div id=\"global\"><p class=\"paragraph\">1800</p></div>");
echo $dom->getElementsByTagName('p')->item(0)->nodeValue;
2 Comments
kmunky
and if i want to get elements by class name?
Michael Mrozek
I don't think there's a method for that, DOMs usually don't have it, you need to loop over the nodes and check each one. php.net/manual/en/class.domdocument.php
You need to parse the HTML. There are several ways to do this, including using PHP's XML parsing functions.
However, if it is just a simple value (as you asked above) I would use the following simple code:
// your content
$contents='<div id="global"><p class="paragraph">1800</p></div>';
// define start and end position
$start='<div id="global"><p class="paragraph">';
$end='</p></div>';
// find the stuff
$contents=substr($contents,strpos($contents,$start)+strlen($start));
$contents=substr($contents,0,strpos($contents,$end));
// write output
echo $contents;
Best of luck!
Christian Sciberras
(tested and works)
1 Comment
Christian
I would recommend using Michael Mrozek's answer if you want more flexibility. However, I would discourage the use of RegExp especially in this context: [1] They are slower compared to simple traditional methods. [2] They are harder to maintain. [3] They imply you knowing them which is probably not something you would want to spend a lot of time on.
$input = '<div id="global"><p class="paragraph">1800</p></div>';
$output = strip_tags($input);
2 Comments
Christopher Richa
He wants to use
file_get_contents() and that example he gave was what could be found in the example website.
hsz
I know. But what if his website has only one
<div> with one value ? :)preg_match_all('#paragraph">(.*?)<#is', $input, $output);
print_r($output);
Untested.
file_get_contents().