php - Regex not quite right

Question

I have a site crawler which displays a list of urls, but the problem is I cannot for the life of me get the last regex quite right. all urls end up listed as:

http://www.website.org/page1.html&--EFTTIUGJ4ITCyh0Frzb_LFXe_eHw
http://website.net/page2/&--EyqBLeFeCkSfmvA7p0cLrsy1Zm1g
http://foobar.website.com/page3.php&--E5WRBxuTOQikDIyBczaVXveOdRFg

The Urls can all be different and the only thing which seems static is the & symbol. How would go abouts getting rid of the & symbol and everything beyond it to the right?

Here is what I have tried with the above results:

function getresults($sterm) {
$html = file_get_html($sterm);
$result = "";
// find all span tags with class=gb1
foreach($html->find('h3[class="r"]') as $ef)
{   
$result .=  $ef->outertext . '<br>';
}
return $result;
}

function geturl($url) {
  $var = $url;
  $result = "";

preg_match_all ("/a[\s]+[^>]*?href[\s]?=[\s\"\/url?q=\']+".
               "(.*?)[\"\']+.*?>"."([^<]+|.*?)?<\/a>/",              

               $var, $matches);

$matches = $matches[1];

foreach($matches as $var)
{    
    $result .= $var."<br>";
}

echo preg_replace('/sa=U.*?usg=.*?AFQjCN/', "--" , $result);

}

Answer 1

如果 url 始终采用相同的格式，请使用 explode ：

<?php
$tmp = explode("&", "http://foobar.website.com/page3.php&--E5WRBxuTOQikDIyBczaVXveOdRFg");
?>

$tmp[0] 应该内容“ http://foobar.website.com/page3.php ”并且 $tmp[1] 应该内容“--E5WRBxuTOQikDIyBczaVXveOdRFg”

Answer 2

删除 & 字符后所有内容的简单方法：

$result = substr($result, 0, strpos($result, '&'));