那些遇到过的问题

如何使用PHP获取网站的favicon？

Kem*_*mal 17 php regex favicon

我希望得到,请求网站的PHP图标.我被推荐使用谷歌的favicon服务,但它不起作用.我想自己做点什么,但不知道正则表达式的用法.

我在Google上发现了一个适用于大多数情况的课程,但它的错误率却令人无法接受.你可以看看这里:http://www.controlstyle.com/articles/programming/text/php-favicon/

请问有人请帮我使用正则表达式获取图标吗？

Sta*_*arx 46

使用S2 service谷歌提供的.就这么简单

http://www.google.com/s2/favicons?domain=www.yourdomain.com
Run Code Online (Sandbox Code Playgroud)

刮这个会更容易,试图自己做.

  • @ DBS，vooD的答案会手动抓取带有“快捷方式图标”的链接，而此答案显示了一种检索由Google抓取的图标的方法。如果谷歌将图标存储在缓存中（它可能会这样做），那么我会说这很快。 (2认同)

voo*_*ooD 32

又快又脏:

<?php 
$url = 'http://example.com/';
$doc = new DOMDocument();
$doc->strictErrorChecking = FALSE;
$doc->loadHTML(file_get_contents($url));
$xml = simplexml_import_dom($doc);
$arr = $xml->xpath('//link[@rel="shortcut icon"]');
echo $arr[0]['href'];
Run Code Online (Sandbox Code Playgroud)

  • @Ahmet Kemal不说"谢谢"只是投票回答:) (4认同)
  • 我喜欢这种快速而肮脏的东西.谢谢. (3认同)
  • 另外值得注意的是,这可以返回相对路径或绝对路径,具体取决于站点本身. (3认同)

Mar*_*cel 5

看起来http://www.getfavicon.org/?url=domain.com（常见问题解答）可靠地抓取了网站的图标。我意识到这是一个 3rd 方服务，但我认为它是 Google favicon 服务的一个有价值的替代品。

  • 今天又出现了，但只是没有显示任何图标。 (2认同)

adi*_*lbo 0

#PHP 抓取网站图标

这是一种使用许多参数从页面 URL 获取网站图标的舒适方法。

怎么运行的

  1. 检查图标是否已存在于本地或不希望保存，如果是则返回路径和文件名
  2. 否则加载 URL 并尝试将 favicon 位置与正则表达式匹配
  3. 如果我们有匹配的图标链接将成为绝对链接
  4. 如果我们没有网站图标，我们会尝试在域根目录中获取一个网站图标
  5. 如果仍然没有 favicon，我们随机尝试 google、faviconkit 和 favicongraber API
  6. 如果应保存图标，请尝试加载图标 URL
  7. 如果希望下次保存网站图标并返回路径和文件名

因此它结合了两种方式：尝试从页面获取 Favicon，如果这不起作用，请使用返回 Favicon 的“API”服务;-)

<?php
/*

PHP Grab Favicon
================

> This `PHP Favicon Grabber` use a given url, save a copy (if wished) and return the image path.

How it Works
------------

1. Check if the favicon already exists local or no save is wished, if so return path & filename
2. Else load URL and try to match the favicon location with regex
3. If we have a match the favicon link will be made absolute
4. If we have no favicon we try to get one in domain root
5. If there is still no favicon we randomly try google, faviconkit & favicongrabber API
6. If favicon should be saved try to load the favicon URL
7. If wished save the Favicon for the next time and return the path & filename

How to Use
----------

```PHP
$url = 'example.com';

$grap_favicon = array(
'URL' => $url,   // URL of the Page we like to get the Favicon from
'SAVE'=> true,   // Save Favicon copy local (true) or return only favicon url (false)
'DIR' => './',   // Local Dir the copy of the Favicon should be saved
'TRY' => true,   // Try to get the Favicon frome the page (true) or only use the APIs (false)
'OVR' => false,  // Skip if file is already local (false) or overwrite (true)
'DEV' => null,   // Give all Debug-Messages ('debug') or only make the work (null)
);

echo '<img src="'.grap_favicon($grap_favicon).'">';
```

Todo
----
Optional split the download dir into several sub-dirs (MD5 segment of filename e.g. /af/cd/example.com.png) if there are a lot of favicons.

Infos about Favicon
-------------------
https://github.com/audreyr/favicon-cheat-sheet

###### Copyright 2019-2023 Igor Gaffling

*/

$time_start = microtime(true);

/* Defaults */

$debug = null;
$consoleMode = false;
$overWrite = false;
$localPath = "./";
$saveLocal = true;
$tryHomepage = true;
$testURLs = array();

/* Detect Console Mode, can be overridden with switches */

if (php_sapi_name() == "cli") { $consoleMode = true; }

if ($consoleMode) { $script_name = basename(__FILE__); } else { $script_name = basename($_SERVER['PHP_SELF']); }

/* Command Line Options */
$shortopts  = "";
$shortopts  = "l::";
$shortopts  = "p::";
$shortopts .= "h?";

$longopts  = array(
  "list::",
  "path::",
  "user-agent::",
  "curl-timeout::",
  "tryhomepage",
  "onlyuseapis",
  "store",
  "nostore",
  "save",
  "nosave",
  "overwrite",
  "skip",
  "curl-verbose",
  "consolemode",
  "noconsolemode",
  "debug",
  "help",
);


$options = getopt($shortopts, $longopts);

if ((isset($options['help'])) || (isset($options['h'])) || (isset($options['?'])))
{
  echo "Usage: $script_name (Switches)\n\n";
  echo "--list=FILE/LIST            Filename or a delimited list of URLs to check.  Lists can be separated with space, comma or semi-colon.\n";
  echo "--path=PATH                 Location to store icons (default is $localPath)\n";
  echo "\n";
  echo "--tryhomepage               Try homepage first, then APIs.  (default is true)\n";
  echo "--onlyuseapis               Only use APIs.\n";
  echo "--store                     Store favicons locally. (default is true)\n";
  echo "--nostore                   Do not store favicons locally.\n";
  echo "--overwrite                 Overwrite local favicons (default is false)\n";
  echo "--skip                      Skip local favicons if they are already present. (default is true)\n";
  echo "--consolemode               Force console output.\n";
  echo "--noconsolemode             Force HTML output.\n";
  echo "--debug                     Enable debug messages.\n";
  echo "--user-agent=AGENT_STRING   Customize the user agent.\n";
  echo "--curl-verbose              Enable cURL verbose.\n";
  echo "--curl-timeout=SECONDS      Set cURL timeeout (default is 60).\n";
  echo "\n";
  exit;
}

/* Process Options */

$opt_list = null;
$opt_localpath = null;
$opt_usestdin = null;
$opt_tryhomepage = null;
$opt_storelocal = null;
$opt_debug = null;
$opt_console = null;
$opt_timeout = null;
$opt_curl_user_agent = null;
$opt_curl_verbose = false;
$opt_curl_timeout = null;

if (isset($options['debug'])) { $opt_debug = true; }
if (isset($options['list'])) { $opt_list = $options['list']; }
if (isset($options['path'])) { $opt_localpath = $options['path']; }
if (isset($options['l'])) { $opt_list = $options['l']; }
if (isset($options['p'])) { $opt_localpath = $options['p']; }
if (isset($options['consolemode'])) { $opt_console = true; }
if (isset($options['store'])) { $opt_storelocal = true; }
if (isset($options['save'])) { $opt_storelocal = true; }
if (isset($options['skip'])) { $overWrite = false; }
if (isset($options['tryhomepage'])) { $opt_tryhomepage = true; }
if (isset($options['nostore'])) { $opt_storelocal = false; }
if (isset($options['nosave'])) { $opt_storelocal = false; }
if (isset($options['onlyuseapis'])) { $opt_tryhomepage = false; }
if (isset($options['noconsolemode'])) { $opt_console = false; }
if (isset($options['overwrite'])) { $overWrite = true; }
if (isset($options['user-agent'])) { $opt_curl_user_agent = $options['user-agent']; }
if (isset($options['curl-verbose'])) { $opt_curl_verbose = true; }
if (isset($options['curl-timeout'])) { $opt_curl_timeout = $options['curl-timeout']; }

if (!is_null($opt_localpath)) { if (file_exists($opt_localpath)) { $localPath = $opt_localpath; } }
if (!is_null($opt_tryhomepage)) { $tryHomepage = $opt_tryhomepage; }
if (!is_null($opt_storelocal)) { $saveLocal = $opt_storelocal; }
if (!is_null($opt_debug)) { if ($opt_debug) { $debug = "debug"; } else { $debug = null; } }
if (!is_null($opt_console)) { $consoleMode = $opt_console; }
if (!is_null($opt_curl_timeout)) { if (is_numeric($opt_curl_timeout)) { if ($opt_curl_timeout >= 0 && $opt_curl_timeout < 600) { $opt_timeout = $opt_curl_timeout; } } }

if (isset($opt_list)) {
  if (file_exists($opt_list)) {
    $testURLs = file($opt_list,FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
  } else {
    if (count($testURLs) == 0) {
      $testURLs = explode(",",str_replace(array(",",";"," "),",",$opt_list));
    }
  }
}

if (is_null($opt_curl_user_agent)) { if (isset($_SERVER['SERVER_NAME'])) { $opt_curl_user_agent = 'FaviconBot/1.0 (+http://'.$_SERVER['SERVER_NAME'].'/'; } else { $opt_curl_user_agent = 'FaviconBot/1.0/'; } }
if (strtolower($opt_curl_user_agent) != "none") { setGlobal('curl_useragent', $opt_curl_user_agent); }
setGlobal('curl_verbose', $opt_curl_verbose);
if (!is_null($opt_timeout)) { setGlobal('curl_timeout', $opt_timeout); }

if (count($testURLs) == 0) {
  $testURLs = array(
    'http://aws.amazon.com',
    'http://www.apple.com',
    'http://www.dribbble.com',
    'http://www.github.com',
    'http://www.intercom.com',
    'http://www.indiehackers.com',
    'http://www.medium.com',
    'http://www.mailchimp.com',
    'http://www.netflix.com',
    'http://www.producthunt.com',
    'http://www.reddit.com',
    'http://www.slack.com',
    'http://www.soundcloud.com',
    'http://www.stackoverflow.com',
    'http://www.techcrunch.com',
    'http://www.trello.com',
    'http://www.vimeo.com',
    'https://www.whatsapp.com/',
    'https://www.gaffling.com/',
  );
}

foreach ($testURLs as $url) {
  $grap_favicon = array(
    'URL' => $url,          // URL of the Page we like to get the Favicon from
    'SAVE'=> $saveLocal,    // Save Favicon copy local (true) or return only favicon url (false)
    'DIR' => $localPath,    // Local Dir the copy of the Favicon should be saved
    'TRY' => $tryHomepage,  // Try to get the Favicon frome the page (true) or only use the APIs (false)
    'OVR' => $overWrite,    // Overwrite existing local files or skip
    'DEV' => $debug,        // Give all Debug-Messages ('debug') or only make the work (null)
  );
  $favicons[] = grap_favicon($grap_favicon, $consoleMode);
}

foreach ($favicons as $favicon) {
  if (!empty($favicon))
  {
    if ($consoleMode) {
      echo "Icon: $favicon\n";
    } else {
      echo '<img title="'.$favicon.'" style="width:32px;padding-right:32px;" src="'.$favicon.'">';
    }
  }
}

if ($consoleMode) {
  echo "\nRuntime: ".round(microtime(true)-$time_start,2)." Sec.\n";
} else {
  echo '<br><br><tt>Runtime: '.round((microtime(true)-$_SERVER["REQUEST_TIME_FLOAT"]),2).' Sec.';
}

/*  FUNCTIONS */
function grap_favicon($options=array(), $consoleMode = false) {
  if (!$consoleMode) {
    // avoid script runtime timeout
    $max_execution_time = ini_get("max_execution_time");
    set_time_limit(0); // 0 = no timelimit
  }

  $curlTimeout = getGlobal('curl_timeout');

  // Ini Vars
  $url       = (isset($options['URL']))?$options['URL']:'gaffling.com';
  $save      = (isset($options['SAVE']))?$options['SAVE']:true;
  $directory = (isset($options['DIR']))?$options['DIR']:'./';
  $trySelf   = (isset($options['TRY']))?$options['TRY']:true;
  $DEBUG     = (isset($options['DEV']))?$options['DEV']:null;
  $overwrite = (isset($options['OVR']))?$options['OVR']:false;

  // URL to lower case
    $url = strtolower($url);

    // Get the Domain from the URL
  $domain = parse_url($url, PHP_URL_HOST);

  // Check Domain
  $domainParts = explode('.', $domain);
  if(count($domainParts) == 3 and $domainParts[0]!='www') {
    // With Subdomain (if not www)
    $domain = $domainParts[0].'.'.
              $domainParts[count($domainParts)-2].'.'.$domainParts[count($domainParts)-1];
  } else if (count($domainParts) >= 2) {
    // Without Subdomain
        $domain = $domainParts[count($domainParts)-2].'.'.$domainParts[count($domainParts)-1];
    } else {
      // Without http(s)
      $domain = $url;
    }

    // FOR DEBUG ONLY
  if ($consoleMode) {
    if($DEBUG=='debug')echo "Domain: $domain\n";
  } else {
    if($DEBUG=='debug')print('<b style="color:red;">Domain</b> #'.@$domain.'#<br>');
  }

  // If $trySelf == TRUE ONLY USE APIs
  if (isset($trySelf) && $trySelf == TRUE) {

    // Load Page
    $html = load($url, $DEBUG, $consoleMode, $curlTimeout);

    if (empty($html)) {
      if ($consoleMode) {
        if($DEBUG=='debug')echo "No data received\n";
      }
    } else {
      if ($consoleMode) {
        if($DEBUG=='debug')echo "Attempting RegEx Match\n";
      }
      // Find Favicon with RegEx
      $regExPattern = '/((<link[^>]+rel=.(icon|shortcut\sicon|alternate\sicon)[^>]+>))/i';
      if (@preg_match($regExPattern, $html, $matchTag)) {
        if ($consoleMode) {
          if($DEBUG=='debug')echo "RegEx Initial Pattern Matched\n";
          if($DEBUG=='debug')print_r($matchTag) . "\n";
        }
        $regExPattern = '/href=(\'|\")(.*?)\1/i';
        if (isset($matchTag[1]) && @preg_match($regExPattern, $matchTag[1], $matchUrl)) {
          if ($consoleMode) {
            if($DEBUG=='debug')echo "RegEx Secondary Pattern Matched\n";
          }
          if (isset($matchUrl[2])) {
            if ($consoleMode) {
              if($DEBUG=='debug')echo "Found Match, Building Link\n";
            }

            // Build Favicon Link
            $favicon = rel2abs(trim($matchUrl[2]), 'http://'.$domain.'/');

            // FOR DEBUG ONLY
            if ($consoleMode) {
              if($DEBUG=='debug')echo "Match $favicon\n";
            } else {
              if($DEBUG=='debug')print('<b style="color:red;">Match</b> #'.@$favicon.'#<br>');
            }
          } else {
            if ($consoleMode) {
              if($DEBUG=='debug')echo "Failed To Find Match\n";
            }
          }
        } else {
          if ($consoleMode) {
            if($DEBUG=='debug')echo "RegEx Secondary Pattern Failed To Match\n";
          }
        }
      } else {
        if ($consoleMode) {
          if($DEBUG=='debug')echo "RegEx Initial Pattern Failed To Match\n";
        }
      }
    }

    // If there is no Match: Try if there is a Favicon in the Root of the Domain
    if (empty($favicon)) {
      $favicon = 'http://'.$domain.'/favicon.ico';
      if ($consoleMode) {
        if($DEBUG=='debug')echo "Attempting Direct Match\n";
      }

      // Try to Load Favicon
      # if ( !@getimagesize($favicon) ) {
      # https://www.php.net/manual/en/function.getimagesize.php
      # Do not use getimagesize() to check that a given file is a valid image.
      if ($consoleMode) {
        if($DEBUG=='debug')echo "$favicon\n";
      }
      $fileExtension = geticonextension($favicon,false);
      if (is_null($fileExtension)) {
        unset($favicon);
        if ($consoleMode) {
          if($DEBUG=='debug')echo "Failed Direct Match\n";
        }
      }
    }
  } // END If $trySelf == TRUE ONLY USE APIs

  // If nothink works: Get the Favicon from API
  if ((!isset($favicon)) || (empty($favicon))) {
    if ($consoleMode) {
      if($DEBUG=='debug')echo "Attempting API Match\n";
    }

    // Select API by Random
    $random = rand(1,3);

    // Faviconkit API
    if (($random == 1) || (empty($favicon))) {
      if ($consoleMode) {
        if($DEBUG=='debug')echo "API: Selected FavIconKit\n";
      }
      $favicon = 'https://api.faviconkit.com/'.$domain.'/16';
    }

    // Favicongrabber API
    if (($random == 2) || (empty($favicon))) {
      if ($consoleMode) {
        if($DEBUG=='debug')echo "API: Selected FavIconGrabber\n";
      }
      $echo = json_decode(load('http://favicongrabber.com/api/grab/'.$domain,FALSE),TRUE);

      // Get Favicon URL from Array out of json data (@ if something went wrong)
      $favicon = @$echo['icons']['0']['src'];
    }

    // Google API (check also md5() later)
    if ($random == 3) {
      if ($consoleMode) {
        if($DEBUG=='debug')echo "API: Selected Google\n";
      }
      $favicon = 'http://www.google.com/s2/favicons?domain='.$domain;
    }

    // FOR DEBUG ONLY
    if ($consoleMode) {
      if($DEBUG=='debug')echo "API ($random): Result: $favicon\n";
    } else {
      if($DEBUG=='debug')print('<b style="color:red;">'.$random.'. API</b> #'.@$favicon.'#<br>');
    }

  } // END If nothink works: Get the Favicon from API


  // If Favicon should be saved
  if ((isset($save)) && ($save == TRUE)) {
    unset($content);

    if ($consoleMode) {
      if($DEBUG=='debug')echo "Attempting to load favicon\n";
    }

    //  Load Favicon
    $content = load($favicon, $DEBUG, $consoleMode, $curlTimeout);

    if (empty($content)) {
      if ($consoleMode) {
        if($DEBUG=='debug')echo "Failed to load favicon\n";
      }
    } else {
      // If Google API don't know and deliver a default Favicon (World)
      if (isset($random) && $random == 3 && md5($content) == '3ca64f83fdcf25135d87e08af65e68c9') {
        $domain = 'default'; // so we don't save a default icon for every domain again

        // FOR DEBUG ONLY
        if ($consoleMode) {
          if($DEBUG=='debug')echo "Google: #use default icon#\n";
        } else {
          if($DEBUG=='debug')print('<b style="color:red;">Google</b> #use default icon#<br>');
        }
      }

      //  Get Type
      if (!empty($favicon)) {
        $fileExtension = geticonextension($favicon);
        if (is_null($fileExtension)) {
          if ($consoleMode) {
            if($DEBUG=='debug')echo "Invalid File Type for $favicon\n";
          } else {
            if($DEBUG=='debug')print('<b style="color:red;">Write-File</b> #INVALID_IMAGE#<br>');
          }
        } else {
          $filePath = preg_replace('#\/\/#', '/', $directory.'/'.$domain.'.'.$fileExtension);

          //  If overwrite, delete it
          if (file_exists($filePath)) { if ($overwrite) { unlink($filePath); } }

          //  If file exists, skip
          if (file_exists($filePath)) {
            // FOR DEBUG ONLY
            if ($consoleMode) {
              if($DEBUG=='debug')echo "Skipping File $filePath\n";
            } else {
              if($DEBUG=='debug')print('<b style="color:red;">Skip-File</b> #'.@$filePath.'#<br>');
            }
          } else {
            // Write
            $fh = @fopen($filePath, 'wb');
            fwrite($fh, $content);
            fclose($fh);
            // FOR DEBUG ONLY
            if ($consoleMode) {
              if($DEBUG=='debug')echo "Writing File $filePath\n";
            } else {
              if($DEBUG=='debug')print('<b style="color:red;">Write-File</b> #'.@$filePath.'#<br>');
            }
          }
        }
      }
    }
  } else {
    // Don't save Favicon local, only return Favicon URL
    $filePath = $favicon;
  }

    // FOR DEBUG ONLY
    if ($DEBUG=='debug') {
    // Load the Favicon from local file
    if (!empty($filePath)) {
      if (!function_exists('file_get_contents')) {
        $fh = @fopen($filePath, 'r');
        while (!feof($fh)) {
          $content .= fread($fh, 128); // Because filesize() will not work on URLS?
        }
        fclose($fh);
      } else {
        $content = file_get_contents($filePath);
      }
      if ($consoleMode) {
        echo geticonextension($filePath) . " format file loaded from $filePath\n";
      } else {
      print('<b style="color:red;">Image</b> <img style="width:32px;"
             src="data:image/png;base64,'.base64_encode($content).'"><hr size="1">');
      }
    }
  }


  if (!$consoleMode) {
    // reset script runtime timeout
    set_time_limit($max_execution_time); // set it back to the old value
  }

  // Return Favicon Url
  return $filePath;

} // END MAIN Function

/* HELPER load use curl or file_get_contents (both with user_agent) and fopen/fread as fallback */
function load($url, $DEBUG, $consoleMode = false, $timeOut = 60) {
  if (function_exists('curl_version')) {
    if (!isset($timeOut)) { $timeOut = 60; }
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_USERAGENT, getGlobal('curl_useragent'));
    curl_setopt($ch, CURLOPT_VERBOSE, getGlobal('curl_verbose'));
    curl_setopt($ch, CURLOPT_TIMEOUT, $timeOut);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    $content = curl_exec($ch);
    if ( $DEBUG=='debug' ) { // FOR DEBUG ONLY
      $http_code = curl_getinfo($ch);
      if ($consoleMode) {
        echo "cURL: '$url' ".$http_code['http_code']."\n";
      } else {
        print('<b style="color:red;">cURL</b> #'.$http_code['http_code'].'#<br>');
      }
    }
    curl_close($ch);
    unset($ch);
  } else {
    $context = array ( 'http' => array (
        'user_agent' => 'FaviconBot/1.0 (+http://'.$_SERVER['SERVER_NAME'].'/)'),
    );
    $context = stream_context_create($context);
      if (!function_exists('file_get_contents')) {
      $fh = fopen($url, 'r', FALSE, $context);
      $content = '';
      while (!feof($fh)) {
        $content .= fread($fh, 128); // Because filesize() will not work on URLS?
      }
      fclose($fh);
    } else {
      $content = file_get_contents($url, NULL, $context);
    }
  }
  return $content;
}

/* HELPER: Change URL from relative to absolute */
function rel2abs($rel, $base) {
    extract(parse_url($base));
    if (strpos( $rel,"//" ) === 0) return $scheme . ':' . $rel;
    if (parse_url( $rel, PHP_URL_SCHEME ) != '') return $rel;
    if ($rel[0] == '#' or $rel[0] == '?') return $base . $rel;
    $path = preg_replace( '#/[^/]*$#', '', $path);
    if ($rel[0] ==  '/') $path = '';
    $abs = $host . $path . "/" . $rel;
    $abs = preg_replace( "/(\/\.?\/)/", "/", $abs);
    $abs = preg_replace( "/\/(?!\.\.)[^\/]+\/\.\.\//", "/", $abs);
    return $scheme . '://' . $abs;
}

/* GET

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