I want to get a value that is inside the html of a page
<a href="https://www.site.com/user.asp?ref=fvFCF9D8N4Ak">
I want to get only the value ref=fvFCF9D8N4Ak
I'm using cURL and php and thought the solution was a regex.
How else should I get this value?
Assuming you're using cURL to pull the HTML of an address, and then use PHP to collect certain data from the gathered HTML:
You can make use of the DOMDocument class to parse of the HTML, find the <a/> tag and collect the value of the href attribute.
After using parse_url() you can extract the query string of it, this is what you want:
// o HTML que recolheste
$html = '<html>
<head></head>
<body>
<a href="https://www.site.com/user.asp?ref=fvFCF9D8N4Ak">bubu</a>
</body>
</html>';
// Instanciar o DOMDocument
$dom = new DOMDocument;
// Carregar o HTML recolhido para o DOMDocument
@$dom->loadHTML($html);
// Percorrer o DOM e por cada tag 'a' encontrada
foreach ($dom->getElementsByTagName('a') as $tag) {
// apanhar o valor do atributo 'href'
$href = $tag->getAttribute('href');
// se não estiver vazio
if (!empty($href)) {
// guardar a query string numa variável
$queryString = parse_url($href, PHP_URL_QUERY); // Resultado: ref=fvFCF9D8N4Ak
}
}
See example working on Ideone .
If you only have the HTML present in the question, the method is exactly the same:
$html = '<a href="https://www.site.com/user.asp?ref=fvFCF9D8N4Ak">';
$dom = new DOMDocument;
@$dom->loadHTML($html);
foreach ($dom->getElementsByTagName('a') as $tag) {
$href = $tag->getAttribute('href');
if (!empty($href)) {
$queryString = parse_url($href, PHP_URL_QUERY); // Resultado: ref=fvFCF9D8N4Ak
}
}
See example working on Ideone .
Hello friend you can try this solution with Regex (I made a simple test class):
<?php
/**
* A simple crawler
* By Rodrigo Nascimento
*
*/
set_time_limit(0);
error_reporting(E_ALL);
Class SimpleCrawler {
private $url;
private $userAgent;
private $httpResponse;
function __construct() {
$this->userAgent = "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:33.0) Gecko/20100101 Firefox/33.0";
$this->chocolateCookie = "chocolateCookies.txt";
}
/**
* Seta a url alvo
* @param string $url
* @return SimpleCrawler
*/
public function setUrl($url) {
$this->url = $url;
return $this;
}
/**
* Requisição get
* @return SimpleCrawler
*/
private function get(){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERAGENT, $this->userAgent);
curl_setopt($ch, CURLOPT_COOKIEFILE, $this->chocolateCookie);
curl_setopt($ch, CURLOPT_COOKIEFILE, $this->chocolateCookie);
$this->httpResponse = curl_exec($ch);
return $this;
}
/**
* Pega o conteudo da requisição
* @return SimpleCrawler
*/
public function getPageContent() {
return $this->httpResponse;
}
/**
* Faz a navegação na página especificado por self::setUrl
* @return SimpleCrawler
*/
public function navigate() {
$this->get();
return $this;
}
}
/* Estancia do nosso objeto que se baseia nos seguintes métodos:
*
* Definir uma url: $simpleCrawler->setUrl('site');
* Navegar em dada url: $simpleCrawler->navigate();
* E por fim ter acesso ao conteúdo da requisição: $simpleCrawler->getPageContent();
*
*/
$simpleCrawler = new SimpleCrawler;
$simpleCrawler->setUrl("http://siteQualquer")
->navigate();
$conteudo = $simpleCrawler->getPageContent();
$urlResult = (preg_match("#?ref=(.*?)\">#", $conteudo, $match)) ? $match[1]
: "Não foi possível obter a url solicitada via Regex.";
echo $urlResult . PHP_EOL;