I am parsing my website (html code) with curl:
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://example.com/product.html");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$content = curl_exec($ch);
Now i want to find a specific <span> with an <a> the a tag contains an href with a parameter. Is it possible to find this parameter ([eventUid]=22) with preg match? I want to save the 22 (id) that comes from a database to a variable using PHP.
Example:
<span><a title="mytitle" href="http://example.com/products.html?tx_example_pi1[eventUid]=22">example</a></span>
if (preg_match('#((https?://)?([-\w]+\.[-\w\.]+)+\w(:\d+)?(/([-\w/_\.]*(\?\S+)?)?)*)#', $content, $matches)) {
echo $matches[2];
} else {
echo 'Nothing found!';
}
At the moment I only found links with this preg search.
Using regular expressions to search through HTML is error prone; it's better to use XPath for that:
$doc = new DOMDocument;
$doc->loadHTML($content);
$xp = new DOMXPath($doc);
foreach ($xp->query('//span/a[contains(#href, "[eventUid]=")]') as $anchor) {
if (preg_match('/\[eventUid\]=(\d+)/', $anchor->getAttribute('href'), $matches)) {
echo $matches[1];
}
}
Related
i want to get the value of the <title> tag for all the pages of my website. i am trying to run the script only on my website domain, and get all the pages links on my website , and the titles of them.
This is my code:
$html = file_get_contents('http://xxxxxxxxx.com');
//Create a new DOM document
$dom = new DOMDocument;
//Parse the HTML. The # is used to suppress any parsing errors
//that will be thrown if the $html string isn't valid XHTML.
#$dom->loadHTML($html);
//Get all links. You could also use any other tag name here,
//like 'img' or 'table', to extract other tags.
$links = $dom->getElementsByTagName('a');
//Iterate over the extracted links and display their URLs
foreach ($links as $link){
//Extract and show the "href" attribute.
echo $link->nodeValue;
echo $link->getAttribute('href'), '<br>';
}
What i get is: z2 i get z1.html and z2....
my z1.html have a title named z3. i want to get z1.html and z3, not z2. Can anyone help me?
adding a bit to hitesh's answer to check if the elements have attributes and the desired attribute exists. also if the getting the 'title' elements actually does return at least one item before trying to grab the first one ($a_html_title->item(0)).
and added an option for curl to follow location (needed it for my hardcoded test for google.com)
foreach ($links as $link) {
//Extract and show the "href" attribute.
if ($link->hasAttributes()){
if ($link->hasAttribute('href')){
$href = $link->getAttribute('href');
$href = 'http://google.com'; // hardcoding just for testing
echo $link->nodeValue;
echo "<br/>".'MY ANCHOR LINK : - ' . $href . "---TITLE--->";
$a_html = my_curl_function($href);
$a_doc = new DOMDocument();
#$a_doc->loadHTML($a_html);
$a_html_title = $a_doc->getElementsByTagName('title');
//get and display what you need:
if ($a_html_title->length){
$a_html_title = $a_html_title->item(0)->nodeValue;
echo $a_html_title;
echo '<br/>';
}
}
}
}
function my_curl_function($url) {
$curl_handle = curl_init();
curl_setopt($curl_handle, CURLOPT_URL, $url);
curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_USERAGENT, 'name');
curl_setopt($curl_handle, CURLOPT_FOLLOWLOCATION, TRUE); // added this
$html = curl_exec($curl_handle);
curl_close($curl_handle);
return $html;
}
you need to make your own custom function and call it in appropriate places , if you need to get multiple tags from the pages which are in anchor tag, you just need to create new custom function.
Below code will help you get started
$html = my_curl_function('http://www.anchorartspace.org/');
$doc = new DOMDocument();
#$doc->loadHTML($html);
$mytag = $doc->getElementsByTagName('title');
//get and display what you need:
$title = $mytag->item(0)->nodeValue;
$links = $doc->getElementsByTagName('a');
//Iterate over the extracted links and display their URLs
foreach ($links as $link) {
//Extract and show the "href" attribute.
echo $link->nodeValue;
echo "<br/>".'MY ANCHOR LINK : - ' . $link->getAttribute('href') . "---TITLE--->";
$a_html = my_curl_function($link->getAttribute('href'));
$a_doc = new DOMDocument();
#$a_doc->loadHTML($a_html);
$a_html_title = $a_doc->getElementsByTagName('title');
//get and display what you need:
$a_html_title = $a_html_title->item(0)->nodeValue;
echo $a_html_title;
echo '<br/>';
}
echo "Title: $title" . '<br/><br/>';
function my_curl_function($url) {
$curl_handle = curl_init();
curl_setopt($curl_handle, CURLOPT_URL, $url);
curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl_handle, CURLOPT_USERAGENT, 'name');
$html = curl_exec($curl_handle);
curl_close($curl_handle);
return $html;
}
let me know if you need any more help
This question already has answers here:
How do you parse and process HTML/XML in PHP?
(31 answers)
Closed 8 years ago.
Please help me check this code. I think my regex wrote has a problem but I don't know how to fix it:
function get_data($url)
{
$ch = curl_init();
$timeout = 5;
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
$content = get_data('http://ibongda.vn/lich-thi-dau-bong-da.hs');
$regex = '/<div id="zone-schedule-group-by-season">(.*)<\/div>/';
preg_match($regex, $content, $matches);
$table = $matches[1];
print_r($table);
I would advise against using regular expression for this. You should use DOM for this task.
The problem with your regular expression is running into newline sequences, it will match until the < in </div>, continuously keep backtracking and fail. Backtracking is what regular expressions do during the course of matching when a match fails. You need to use the s (dotall) modifier which forces the dot to match newlines as well.
$regex = '~<div id="zone-schedule-group-by-season">(.*?)</div>~s';
I suggest don't use regex to parse these. You can use an HTML Parser, DOMDocument with xpath in particular.
function get_data($url)
{
$ch = curl_init();
$timeout = 5;
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
$content = get_data('http://ibongda.vn/lich-thi-dau-bong-da.hs');
$dom = new DOMDocument();
libxml_use_internal_errors(true); // handle errors yourself
$dom->loadHTML($content);
libxml_clear_errors();
$xpath = new DOMXpath($dom);
$table_rows = $xpath->query('//div[#id="zone-schedule-group-by-season"]/table/tbody/tr[#class!="bg-gd" and #class!="table-title"]'); // these are the rows of that table
foreach($table_rows as $rows) { // loop each tr
foreach($rows->childNodes as $td) { // loop each td
if(trim($td->nodeValue) != '') { // don't show empty td
echo trim($td->nodeValue) . '<br/>';
}
}
echo '<hr/>';
}
i am using below code to extract url from a webpage and its working just fine but i want to filter it. it will display all urls in that page but i want only those url which consists of the word "super"
$regex='|<a.*?href="(.*?)"|';
preg_match_all($regex,$result,$parts);
$links=$parts[1];
foreach($links as $link){
echo $link."<br>";
}
so it should echo only uls where the word super is present.
for example it should ignore url
http://xyz.com/abc.html
but it should echo
http://abc.superpower.com/hddll.html
as it consists of the required word super in url
Make your regex un-greedy and it should work:
$regex = '|<a.*?href="(.*?super[^"]*)"|is';
However to parse and scrap HTML it is better to use php's DOM parser.
Update: Here is code using DOM parser:
$request_url ='1900girls.blogspot.in/';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $request_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
$doc = new DOMDocument();
libxml_use_internal_errors(true);
$doc->loadHTML($result); // loads your html
$xpath = new DOMXPath($doc);
$needle = 'blog';
$nodelist = $xpath->query("//a[contains(#href, '" . $needle . "')]");
for($i=0; $i < $nodelist->length; $i++) {
$node = $nodelist->item($i);
echo $node->getAttribute('href') . "\n";
}
is have been told that the best way to parse html is through DOM like this:
<?
$html = "<span>Text</span>";
$doc = new DOMDocument();
$doc->loadHTML( $html);
$elements = $doc->getElementsByTagName("span");
foreach( $elements as $el)
{
echo $el->nodeValue . "\n";
}
?>
but in the above the variable $html can't be a url, or can it??
wouldnt i have to use to function get_file_contents() to get the html of a page?
You have to use DOMDocument::loadHTMLFile to load HTML from an URL.
$doc = new DOMDocument();
$doc->loadHTMLFile($path);
DOMDocument::loadHTML parses a string of HTML.
$doc = new DOMDocument();
$doc->loadHTML(file_get_contents($path));
It can be, but it depends on allow_url_fopen being enabled in your PHP install. Basically all of the PHP file-based functions can accept a URL as a source (or destination). Whether such a URL makes sense is up to what you're trying to do.
e.g. doing file_put_contents('http://google.com') is not going to work, as you'd be attempting to do an HTTP upload to google, and they're not going allow you to replace their homepage...
but doing $dom->loadHTML('http://google.com'); would work, and would suck in google's homepage into DOM for processing.
If you're having trouble using DOM, you could use CURL to parse. For example:
$url = "http://www.davesdaily.com/";
$curl = curl_init();
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_URL, $url);
$input = curl_exec($curl);
$regexp = "<span class=comment>([^<]*)<\/span>";
if(preg_match_all("/$regexp/siU", $input, $matches, PREG_SET_ORDER)) {
foreach($matches as $match);
}
echo $match[0];
The script should grab the text between <span class=comment> and </span> and store inside an array $match. This should echo Entertainment.
Now preg has always been a tool to me that i like but i cant figure out for the life if me if what i want to do is possible let and how to do it is going over my head
What i want is preg_match to be able to return me a div's innerHTML the problem is the div im tring to read has more divs in it and my preg keeps closing on the first tag it find
Here is my Actual code
$scrape_address = "http://isohunt.com/torrent_details/133831593/98e034bd6382e0f4ecaa9fe2b5eac01614edc3c6?tab=summary";
$ch = curl_init($scrape_address);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, '1');
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_ENCODING, "");
$data = curl_exec($ch);
preg_match('% <div id="torrent_details">(.*)</div> %six', $data, $match);
print_r($match);
This has been updated for TomcatExodus's help
Live at :: http://megatorrentz.com/beta/details.php?hash=98e034bd6382e0f4ecaa9fe2b5eac01614edc3c6
<?php
$scrape_address = "http://isohunt.com/torrent_details/133831593/98e034bd6382e0f4ecaa9fe2b5eac01614edc3c6?tab=summary";
$ch = curl_init($scrape_address);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, '1');
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_ENCODING, "");
$data = curl_exec($ch);
$domd = new DOMDocument();
libxml_use_internal_errors(true);
$domd->loadHTML($data);
libxml_use_internal_errors(false);
$div = $domd->getElementById("torrent_details");
if ($div) {
$dom2 = new DOMDocument();
$dom2->appendChild($dom2->importNode($div, true));
echo $dom2->saveHTML();
} else {
echo "Has no element with the given ID\n";
}
Using regular expression leads often to problems when parsing markup documents.
XPath version - independent of the source layout. The only thing you need is a div with that id.
loadHTMLFile($url);
$xp = new domxpath($dom);
$result = $xp->query("//*[#id = 'torrent_details']");
$div=$result->item(0);
if($result->length){
$out =new DOMDocument();
$out->appendChild($out->importNode($div, true));
echo $out->saveHTML();
}else{
echo "No such id";
}
?>
And this is the fix for Maerlyn solution. It didn't work because getElementById() wants a DTD with the id attribute specified. I mean, you can always build a document with "apple" as the record id, so you need something that says "id" is really the id for this tag.
validateOnParse = true;
#$domd->loadHTML($data);
//this doesn't work as the DTD is not specified
//or the specified id attribute is not the attributed called "id"
//$div = $domd->getElementById("torrent_details");
/*
* workaround found here: https://fosswiki.liip.ch/display/BLOG/GetElementById+Pitfalls
* set the "id" attribute as the real id
*/
$elements = $domd->getElementsByTagName('div');
if (!is_null($elements)) {
foreach ($elements as $element) {
//try-catch needed because of elements with no id
try{
$element->setIdAttribute('id', true);
}catch(Exception $e){}
}
}
//now it works
$div = $domd->getElementById("torrent_details");
//Print its content or error
if ($div) {
$dom2 = new DOMDocument();
$dom2->appendChild($dom2->importNode($div, true));
echo $dom2->saveHTML();
} else {
echo "Has no element with the given ID\n";
}
?>
Both of the solutions work for me.
You can do this:
/]>(.)<\/div>/i
Which would give you the largest possible innerHTML.
You cannot. I will not link to the famous question, because I dislike the pointless drivel on top. But still regular expressions are unfit to match nested structures.
You can use some trickery, but this is neither reliable, nor necessarily fast:
preg_match_all('#<div id="1">((<div>.*?</div>|.)*?)</div>#ims'
Your regex had a problem due to the /x flag not matching the opening div. And you used a wrong assertion notation.
preg_match_all('% <div \s+ id="torrent_details">(?<innerHtml>.*)</div> %six', $html, $match);
echo $match['innerHtml'];
That one will work, but you should only need preg_match not preg_match_all if the pages are written well, there should only be one instance of id="torrent_details" on the given page.
I'm retracting my answer. This will not work properly. Use DOM for navigating the document.
haha did it with a bit of tampering thanks for the DOMDocument idea i just to use simple
$ch = curl_init($scrape_address);
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, '1');
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_ENCODING, "");
$data = curl_exec($ch);
$doc = new DOMDocument();
libxml_use_internal_errors(false);
$doc->strictErrorChecking = FALSE;
libxml_use_internal_errors(true);
$doc->loadHTML($data);
$xml = simplexml_import_dom($doc);
print_r($xml->body->table->tr->td->table[2]->tr->td[0]->span[0]->div);