检查文件是否存在于多个域中 - Check if file exist in multiple domains

Check if file exist in multiple domains

我需要检查文件是否存在于多个域/服务器中，然后向用户显示下载链接或编写错误消息。我有这个脚本为1域工作:

<?php
  $domain0='www.example.com';
  $file=$_GET['file']
  $resourceUrl = 'http://$domain0/$file';
  $resourceExists = false;
  $ch = curl_init($resourceUrl);
  curl_setopt($ch, CURLOPT_NOBODY, true);
  curl_exec($ch);
  $statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  curl_close($ch);
  //200 = OK
  if ($statusCode == '200') {
    $resourceExists = true;
  }
  if ($resourceExists == true) {
      echo "Exist! $file";
  } else {
      echo "$file doesnt exist!";
  }
?>

现在我需要检查该文件是否存在于4个域中，我该怎么做?我不知道如何使用数组，所以如果有人告诉我怎么做，我将非常感激。

我将创建一个数组域
我将使用"foreach"循环遍历数组

我将调用一个函数来获得结果

function checkFileOnDomain($file,$domain) {
    $resourceUrl = "http://$domain/$file";
    $ch = curl_init($resourceUrl);
    curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_exec($ch);
    $statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    if($statusCode == '200') 
        return true;
}
$file=$_GET["file"];
// $_GET should be sanitized!
$domain_list=array("www.test1.com","www.test2.com"); 

foreach ($domain_list as $domain) {
    echo "Check DOMAIN: $domain <hr/>";
    if (checkFileOnDomain($file,$domain)) {
        echo ">> [ $file ] EXISTS";
    } else {
        echo ">> [ $file ] DOES NOT EXIST";
    }
    echo "<br/><br/>";
} unset($domain);

编辑:

要应用您的规范，您需要在foreach之前添加一个额外的变量。

    $link_to_file="";
    foreach ($domain_list as $domain) {
        if (checkFileOnDomain($file,$domain)) {
            $link_to_file="$domain/$file";
            break; // get first result and quit
        }
    } unset($domain);
    if (!empty($link_to_file)) {
            echo $link_to_file; //file is here
    } else {
            echo "404";
    }

数组应该可以为您解决这个问题。这将创建一个您想要检查的域数组，然后运行您编写的代码逐一遍历它们。

如果你在使用数组时遇到困难，请查看这里获取更多信息

<?php
    // Create an array of domains
    $domains = ['www.example.com', 'www.example2.com', ...];
    // Cycle through all the domains and run the code
    foreach($domains as $domain) {
        $domain0='www.example.com';
        $file=$_GET['file']
        $resourceUrl = 'http://$domain0/$file';
        $resourceExists = false;
        $ch = curl_init($resourceUrl);
        curl_setopt($ch, CURLOPT_NOBODY, true);
        curl_exec($ch);
        $statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        //200 = OK
        if($statusCode == '200') { 
            $resourceExists = true; 
        } else if($resourceExists == false) {
        }
        if ($resourceExists == true) {
            echo "Exist! $file";
        } else {
            echo "$file doesnt exist!";
        }
    }
?>