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<?php |
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/* |
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Plugin Name: Cachebuster |
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Description: Append a file's modification time to its URL and prevent stale caches. |
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Version: 1.2 |
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Author: Albert Peschar |
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Author URI: https://kiboit.com |
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License: GPLv2 or later |
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*/ |
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|
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function cabu_src($src, $handle) { |
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static $site_url; |
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|
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if(!isset($site_url)) |
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$site_url = cabu_normalize_url(get_site_url()); |
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|
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$file = cabu_normalize_url($src); |
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|
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if($site_url && strpos($file, $site_url) === 0) |
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$file = substr($file, strlen($site_url)); |
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elseif(strpos($file, '//') === 0) |
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return $src; |
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|
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if(($pos = strpos($file, '?')) !== false) |
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$file = substr($file, 0, $pos); |
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|
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$file = ltrim($file, '/'); |
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|
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if($file == '') |
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return $src; |
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|
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$path = ABSPATH . '/' . $file; |
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|
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$mtime = @filemtime($path); |
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|
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if(!$mtime) |
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return $src; |
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|
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$query = '?=' . $mtime; |
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|
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if(($pos = strpos($src, '?')) !== false) |
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$src = substr($src, 0, $pos); |
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|
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return $src . $query; |
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} |
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|
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function cabu_normalize_url($url) { |
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return preg_replace('|^https?://|i', '//', $url); |
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} |
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|
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add_filter('style_loader_src', 'cabu_src', 10, 2); |
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add_filter('script_loader_src', 'cabu_src', 10, 2); |
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|
