I load a html page with PHP Dom Document :
$doc = new DOMDocument();
#$doc->loadHTMLFile($url);
I search in my page all "a" elements, and if they realize my condition i need to replace for example My link is beautiful by just My link is beautiful
Here my loop :
$liens = $div->getElementsByTagName('a');
foreach($liens as $lien){
if($lien->hasAttribute('href')){
if (preg_match("/metz2/i", $lien->getAttribute('href'))) {
//HERE I NEED TO REPLACE </a>
}
$cpt++;
}
}
Do you have any ideas ? Suggestions ? Thanks :)
Every time i need to manage DOM with PHP, i use a framework called PHP Simple HTLM DOM parser. (Link here)
It's very easy to use, something like this might work for you:
// Create DOM from URL or file
$html = file_get_html('http://www.page.com/');
// Find all links
foreach($html->find('a') as $element) {
//Do your custom logic here if you need it, for example this extracts the inner contents of the a-tag, and puts it freely.
$inner = $element->innertext;
$element->outertext($inner);
}
//To echo modified html again:
echo $html;
Could be done with preg_replace as well:
$sText = 'Stackoverflow';
$sText = preg_replace( '/<a.*>(.*)<\/a>/', '$1', $sText );
echo $sText;
Related
I have HTML markup bearing the form
<div id='abcd1234A'><p id='wxyz1234A'>Hello</p></div>
which I need to replace to bear the form
<div id='abcd1234AN'><p id='wxyz1234AN'>Hello</p></div>
where N may be 1,2.. .
The best I have been able to do is as follows
function cloneIt($a,$b)
{
return substr_replace($a,$b,-1);
}
$ndx = "1'";
$str = "<div id='abcd1234A'><p id='wxyz1234A'>Hello</p></div>";
preg_match_all("/id='[a-z]{4}[0-9]{4}A'/",$str,$matches);
$matches = $matches[0];
$reps = array_merge($matches);
$ndxs = array_fill(0,count($reps),$ndx);
$reps = array_map("cloneIt",$reps,$ndxs);
$str = str_replace($matches,$reps,$str);
echo htmlspecialchars($str);
which works just fine. However, my REGEX skills are not much to write home about so I suspect that there is probably a better way to do this. I'd be most obliged to anyone who might be able to suggest a neater/quicker way of accomplishing the same result.
You can optimize your regex like this:
/id='[a-z]{4}\d{4}A'/
Sample code
preg_match_all("/id='[a-z]{4}\\d{4}A'/",$str,$matches);
However an alternative would consist in using en HTML parser. Here I'll use simple html dom:
// Load the HTML from URL or file
$html = file_get_html('http://www.mysite.com/');
// You can also load $html from string: $html = str_get_html($my_string);
// Find div with id attribute
foreach($html->find('div[id]') as $div) {
if (preg_match("/id='([a-z]{4}\\d{4})A'/" , $div->id, $matches)) {
$div->id = $matches[1] + $ndx;
}
}
echo $html->save();
Did you notice how elegant, concise and clear the code becomes with an html parser ?
References
Simple Html Dom Documentation
In PHP I'm using the Simple HTML DOM Parser class.
I have a HTML file which has multiple and diferents tags.
In this HTML there is an element like this:
<a name="10418"><b> Hospitalist (Family Practitioner)</b></a>
So I would like to find that 'a' element with has name="10418"
I've tried this with no luck, because I only want to get that string.
$html_object = str_get_html($url);
$html_object=$html_object->find('a');
foreach ($html_object as $o) {
$a= $o->find("b");
echo $a[0];
}
Try:
$anchor = $html_object->find('a[name=10418]', 0);
echo $anchor->plaintext;
Working DEMO
Try another library called Tag Parse.It's simple and efficient.
$dom = new TagParse\TagDomRoot($html);
$a = $dom->find('a[name="10418"]');
I think it's fast and cost less memory than simple_html_dom.
I would like to use Simple HTML DOM to remove all images in an article so I can easily create a small snippet of text for a news ticker but I haven't figured out how to remove elements with it.
Basically I would do
Get content as HTML string
Remove all image tags from content
Limit content to x words
Output.
Any help?
There is no dedicated methods for removing elements. You just find all the img elements and then do
$e->outertext = '';
when you only delete the outer text you delete the HTML content itself, but if you perform another find on the same elements it will appear in the result. the reason is that the simple HTML DOM object still has it's internal structure of the element, only without its actual content. what you need to do in order to really delete the element is simply reload the HTML as string to the same variable. this way the object will be recreated without the deleted content, and the simple HTML DOM object will be built without it.
here is an example function:
public function removeNode($selector)
{
foreach ($this->find($selector) as $node)
{
$node->outertext = '';
}
$this->load($this->save());
}
put this function inside the simple_html_dom class and you're good.
I think you have some difficulties because you forgot to save(dump the internal DOM tree back into string).
Try this:
$html = file_get_html("http://example.com");
foreach($html ->find('img') as $item) {
$item->outertext = '';
}
$html->save();
echo $html;
I could not figure out where to put the function so I just put the following directly in my code:
$html->load($html->save());
It basically locks changes made in the for loop back into the html per above.
The supposed solutions are quite expensive and practically unusable in a big loop or other kind of repetition.
I prefer to use "soft deletes":
foreach($html->find('somecondition'),$item){
if (somecheck) $item->setAttribute('softDelete', true); //<= set marker to check in further code
$item->outertext='';
foreach($foo as $bar){
if(!baz->getAttribute('softDelete'){
//do something
}
}
}
This is working for me:
foreach($html->find('element') as $element){
$element = NULL;
}
Adding new answer since removeNode is definitely a better way of removing it:
$html->removeNode('img');
This method probably was not available when accepted answer was marked. You do not need to loop the html to find each one, this will remove them.
Use outerhtml instead of outertext
<div id='your_div'>the contents of your div</div>
$your_div->outertext = '';
echo $your_div // echoes <div id='your_div'></div>
$your_div->outerhtml= '';
echo $your_div // echoes nothing
Try this:
$dom = new Dom();
$dom->loadStr($text);
foreach ($dom->find('element') as $element) {
$element->delete();
}
This works now:
$element->remove();
You can see the documentation for the method here.
Below I remove the HEADER and all SCRIPT nodes of the incoming url by using 2 different methods of the FIND() function. Remove the 2nd parameter to return an array of all matching nodes then just loop through the nodes.
$clean_html = file_get_html($url);
// Find and remove 1st instance of node.
$node = $clean_html->find('header', 0);
$node->remove();
// Find and remove all instances of Nde.
$nodes = $clean_html->find('script');
foreach($nodes as $node) {
$node->remove();
}
I have a problem to load specific div element and show on my page using PHP. My code right now is as follows:
<?php
$page = file_get_contents("http://www.bbc.co.uk/sport/football/results");
preg_match('/<div id="results-data" class="fixtures-table full-table-medium">(.*)<\/div>/is', $page, $matches);
var_dump($matches);
?>
I want it to load id="results-data" and show it on my page.
You won't be able to manipulate the URL to get only a portion of the page. So what you'll want to do is grab the page contents via the server-side language of your choice and then parse the HTML. From there you can grab the specific DIV you are looking for and then print that out to your screen. You could also use to remove unwanted content.
With PHP you could use file_get_contents() to read the file you want to parse and then use DOMDocument to parse it and grab the DIV you want.
Here's the basic idea. This is untested but should point you in the right direction:
$page = file_get_contents('http://www.bbc.co.uk/sport/football/results');
$doc = new DOMDocument();
$doc->loadHTML($page);
$divs = $doc->getElementsByTagName('div');
foreach($divs as $div) {
// Loop through the DIVs looking for one withan id of "content"
// Then echo out its contents (pardon the pun)
if ($div->getAttribute('id') === 'content') {
echo $div->nodeValue;
}
}
You should use some html parser. Take a look at PHPQuery, here is how you can do it:
require_once('phpQuery/phpQuery.php');
$html = file_get_contents('http://www.bbc.co.uk/sport/football/results');
phpQuery::newDocumentHTML($html);
$resultData = pq('div#results-data');
echo $resultData;
Check it out here:
http://code.google.com/p/phpquery
Also see their selectors' documentation.
I'm using a crawler to retrieve the HTML content of certain pages on the web. I currently have the entire HTML stored in a single PHP variable:
$string = "<PRE>".htmlspecialchars($crawler->results)."</PRE>\n";
What I want to do is select all "p" tags (for example) and store their in an array. What is the proper way to do that?
I've tried the following, by using xpath, but it doesn't show anything (most probably because the document itself isn't an XML, I just copy-pasted the example given in its documentation).
$xml = new SimpleXMLElement ($string);
$result=$xml->xpath('/p');
while(list( , $node)=each($result)){
echo '/p: ' , $node, "\n";
}
Hopefully someone with (a lot) more experience in PHP will be able to help me out :D
Try using DOMDocument along with DOMDocument::getElementsByTagName. The workflow should be quite simple. Something like:
$doc = DOMDocument::loadHTML(htmlspecialchars($crawler->results));
$pNodes = $doc->getElementsByTagName('p');
Which will return a DOMNodeList.
I vote for use regexp. For tag p
preg_match_all('/<p>(.*)<\/p>/', '<p>foo</p><p>foo 1</p><p>foo 2</p>', $arr, PREG_PATTERN_ORDER);
if(is_array($arr))
{
foreach($arr as $value)
{
echo $value."</br>";
}
}
Check out Simple HTML Dom. It will grab external pages and process them with fairly accurate detail.
http://simplehtmldom.sourceforge.net/
It can be used like this:
// 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>';