Issue
I want to get, requested website’s favicon with PHP. I have been recommended using Google’s favicon service but it is not functional. I want to do something on my own but don’t know regex usage.
I found a class on Google that works on most cases but it has unacceptable error rate. You can have a look here: http://www.controlstyle.com/articles/programming/text/php-favicon/
Can somebody please help me about getting favicon using regex, please?
Solution
PHP Grab Favicon
This is a comfortable way with many parameter to get the favicon from a page URL.
How it Works
- Check if the favicon already exists local or no save is wished, if so return path & filename
- Else load URL and try to match the favicon location with regex
- If we have a match the favicon link will be made absolute
- If we have no favicon we try to get one in domain root
- If there is still no favicon we randomly try google, faviconkit & favicongrabber API
- If favicon should be saved try to load the favicon URL
- If wished save the Favicon for the next time and return the path & filename
So it combine both ways: Try to get the Favicon from the Page and if that don’t work use an "API" Service that give back the Favicon 😉
<?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' => $url, // URL of the Page we like to get the Favicon from
'SAVE'=> true, // Save Favicon copy local (true) or return only favicon url (false)
'DIR' => './', // Local Dir the copy of the Favicon should be saved
'TRY' => true, // Try to get the Favicon frome the page (true) or only use the APIs (false)
'DEV' => null, // Give all Debug-Messages ('debug') or only make the work (null)
);
echo '<img src="'.grap_favicon($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 Igor Gaffling
*/
$testURLs = array(
'http://aws.amazon.com',
'http://www.apple.com',
'http://www.dribbble.com',
'http://www.github.com',
'http://www.intercom.com',
'http://www.indiehackers.com',
'http://www.medium.com',
'http://www.mailchimp.com',
'http://www.netflix.com',
'http://www.producthunt.com',
'http://www.reddit.com',
'http://www.slack.com',
'http://www.soundcloud.com',
'http://www.stackoverflow.com',
'http://www.techcrunch.com',
'http://www.trello.com',
'http://www.vimeo.com',
'https://www.whatsapp.com/',
'https://www.gaffling.com/',
);
foreach ($testURLs as $url) {
$grap_favicon = array(
'URL' => $url, // URL of the Page we like to get the Favicon from
'SAVE'=> 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)
'DEV' => null, // Give all Debug-Messages ('debug') or only make the work (null)
);
$favicons[] = grap_favicon($grap_favicon);
}
foreach ($favicons as $favicon) {
echo '<img title="'.$favicon.'" style="width:32px;padding-right:32px;" src="'.$favicon.'">';
}
echo '<br><br><tt>Runtime: '.round((microtime(true)-$_SERVER["REQUEST_TIME_FLOAT"]),2).' Sec.';
function grap_favicon( $options=array() ) {
// 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;
// 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 = $url;
}
// FOR DEBUG ONLY
if($DEBUG=='debug')print('<b style="color:red;">Domain</b> #'.@$domain.'#<br>');
// Make Path & Filename
$filePath = preg_replace('#\/\/#', '/', $directory.'/'.$domain.'.png');
// If Favicon not already exists local
if ( !file_exists($filePath) or @filesize($filePath)==0 ) {
// If $trySelf == TRUE ONLY USE APIs
if ( isset($trySelf) and $trySelf == TRUE ) {
// Load Page
$html = load($url, $DEBUG);
// Find Favicon with RegEx
$regExPattern = '/((<link[^>]+rel=.(icon|shortcut icon|alternate icon)[^>]+>))/i';
if ( @preg_match($regExPattern, $html, $matchTag) ) {
$regExPattern = '/href=(\'|\")(.*?)\1/i';
if ( isset($matchTag[1]) and @preg_match($regExPattern, $matchTag[1], $matchUrl)) {
if ( isset($matchUrl[2]) ) {
// Build Favicon Link
$favicon = rel2abs(trim($matchUrl[2]), 'http://'.$domain.'/');
// FOR DEBUG ONLY
if($DEBUG=='debug')print('<b style="color:red;">Match</b> #'.@$favicon.'#<br>');
}
}
}
// If there is no Match: Try if there is a Favicon in the Root of the Domain
if ( empty($favicon) ) {
$favicon = 'http://'.$domain.'/favicon.ico';
// Try to Load Favicon
if ( [email protected]($favicon) ) {
unset($favicon);
}
}
} // END If $trySelf == TRUE ONLY USE APIs
// If nothink works: Get the Favicon from API
if ( !isset($favicon) or empty($favicon) ) {
// Select API by Random
$random = rand(1,3);
// Faviconkit API
if ($random == 1 or empty($favicon)) {
$favicon = 'https://api.faviconkit.com/'.$domain.'/16';
}
// Favicongrabber API
if ($random == 2 or empty($favicon)) {
$echo = json_decode(load('http://favicongrabber.com/api/grab/'.$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) {
$favicon = 'http://www.google.com/s2/favicons?domain='.$domain;
}
// FOR DEBUG ONLY
if($DEBUG=='debug')print('<b style="color:red;">'.$random.'. API</b> #'.@$favicon.'#<br>');
} // END If nothink works: Get the Favicon from API
// Write Favicon local
$filePath = preg_replace('#\/\/#', '/', $directory.'/'.$domain.'.png');
// If Favicon should be saved
if ( isset($save) and $save == TRUE ) {
// Load Favicon
$content = load($favicon, $DEBUG);
// If Google API don't know and deliver a default Favicon (World)
if ( isset($random) and $random == 3 and
md5($content) == '3ca64f83fdcf25135d87e08af65e68c9' ) {
$domain = 'default'; // so we don't save a default icon for every domain again
// FOR DEBUG ONLY
if($DEBUG=='debug')print('<b style="color:red;">Google</b> #use default icon#<br>');
}
// Write
$fh = @fopen($filePath, 'wb');
fwrite($fh, $content);
fclose($fh);
// FOR DEBUG ONLY
if($DEBUG=='debug')print('<b style="color:red;">Write-File</b> #'.@$filePath.'#<br>');
} else {
// Don't save Favicon local, only return Favicon URL
$filePath = $favicon;
}
} // END If Favicon not already exists local
// FOR DEBUG ONLY
if ($DEBUG=='debug') {
// Load the Favicon from local file
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);
}
print('<b style="color:red;">Image</b> <img style="width:32px;"
src="data:image/png;base64,'.base64_encode($content).'"><hr size="1">');
}
// 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) {
if ( function_exists('curl_version') ) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_USERAGENT, 'FaviconBot/1.0 (+http://'.$_SERVER['SERVER_NAME'].'/');
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);
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;
}
Source: https://github.com/gaffling/PHP-Grab-Favicon
Answered By – adilbo
This Answer collected from stackoverflow, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0