Question

我需要定期循环遍历PHP数据库中的链接，以检查链接是否指向有效页面。如果链接已过期或无效，我不想输出它。如何检查href值是否有效地导致有效页面？

感谢任何*指针。

Answer 1

看看卷曲。它允许您在php http://www.php.net/manual/en/function.curl-exec.php中提取网站然后只需检查响应中的状态代码或类似标题标记的内容。

Answer 2

您还可以每次使用多个CUrl请求来更快地检查所有列表。 Check here

Answer 3

我自己就是一个菜鸟，但我建议使用cURL。谷歌快速使用搜索显示以下代码（我还没有测试过）：

<?php

$statusCode = validate($_REQUEST['url']);
if ($statusCode==’200′)
  echo ‘Voila! URL ‘.$_REQUEST['url'].
  ’ exists, returned code is :’.$statusCode;
else
  echo ‘Opps! URL ‘.$_REQUEST['url'].
  ’ does NOT exist, returned code is :’.$statusCode;

function validateurl($url)
{
  // Initialize the handle
  $ch = curl_init();
  // Set the URL to be executed
  curl_setopt($ch, CURLOPT_URL, $url);
  // Set the curl option to include the header in the output
  curl_setopt($ch, CURLOPT_HEADER, true);
  // Set the curl option NOT to output the body content
  curl_setopt($ch, CURLOPT_NOBODY, true);
  /* Set to TRUE to return the transfer
  as a string of the return value of curl_exec(),
  instead of outputting it out directly */
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  // Execute it
  $data = curl_exec($ch);
  // Finally close the handle
  curl_close($ch);
  /* In this case, we’re interested in
  only the HTTP status code returned, therefore we
  use preg_match to extract it, so in the second element
  of the returned array is the status code */
  preg_match(“/HTTP\/1\.[1|0]\s(\d{3})/”,$data,$matches);
  return $matches[1];
}
?>

来源：http://www.ajaxapp.com/2009/03/23/to-validate-if-an-url-exists-use-php-curl/

验证链接href属性

3 个答案: