"], ['[', ']'], $string); } /** * @brief Use this on "body" or "content" input where angle chars shouldn't be removed, * and allow them to be safely displayed. * @param string $string * * @return string */ public static function escapeHtml($string) { return htmlspecialchars($string, ENT_COMPAT, 'UTF-8', false); } /** * @brief Generate a string that's random, but usually pronounceable. Used to generate initial passwords * * @param int $len length * * @return string */ public static function getRandomName($len) { if ($len <= 0) { return ''; } $vowels = ['a', 'a', 'ai', 'au', 'e', 'e', 'e', 'ee', 'ea', 'i', 'ie', 'o', 'ou', 'u']; if (mt_rand(0, 5) == 4) { $vowels[] = 'y'; } $cons = [ 'b', 'bl', 'br', 'c', 'ch', 'cl', 'cr', 'd', 'dr', 'f', 'fl', 'fr', 'g', 'gh', 'gl', 'gr', 'h', 'j', 'k', 'kh', 'kl', 'kr', 'l', 'm', 'n', 'p', 'ph', 'pl', 'pr', 'qu', 'r', 'rh', 's', 'sc', 'sh', 'sm', 'sp', 'st', 't', 'th', 'tr', 'v', 'w', 'wh', 'x', 'z', 'zh' ]; $midcons = [ 'ck', 'ct', 'gn', 'ld', 'lf', 'lm', 'lt', 'mb', 'mm', 'mn', 'mp', 'nd', 'ng', 'nk', 'nt', 'rn', 'rp', 'rt' ]; $noend = [ 'bl', 'br', 'cl', 'cr', 'dr', 'fl', 'fr', 'gl', 'gr', 'kh', 'kl', 'kr', 'mn', 'pl', 'pr', 'rh', 'tr', 'qu', 'wh', 'q' ]; $start = mt_rand(0, 2); if ($start == 0) { $table = $vowels; } else { $table = $cons; } $word = ''; for ($x = 0; $x < $len; $x++) { $r = mt_rand(0, count($table) - 1); $word .= $table[$r]; if ($table == $vowels) { $table = array_merge($cons, $midcons); } else { $table = $vowels; } } $word = substr($word, 0, $len); foreach ($noend as $noe) { $noelen = strlen($noe); if ((strlen($word) > $noelen) && (substr($word, -$noelen) == $noe)) { $word = self::getRandomName($len); break; } } return $word; } /** * Translate and format the network name of a contact * * @param string $network Network name of the contact (e.g. dfrn, rss and so on) * @param string $url The contact url * * @return string Formatted network name * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ public static function formatNetworkName($network, $url = '') { if ($network != '') { if ($url != '') { $network_name = '' . ContactSelector::networkToName($network, $url) . ''; } else { $network_name = ContactSelector::networkToName($network); } return $network_name; } } /** * @brief Remove indentation from a text * * @param string $text String to be transformed. * @param string $chr Optional. Indentation tag. Default tab (\t). * @param int $count Optional. Default null. * * @return string Transformed string. */ public static function deindent($text, $chr = "[\t ]", $count = NULL) { $lines = explode("\n", $text); if (is_null($count)) { $m = []; $k = 0; while ($k < count($lines) && strlen($lines[$k]) == 0) { $k++; } preg_match("|^" . $chr . "*|", $lines[$k], $m); $count = strlen($m[0]); } for ($k = 0; $k < count($lines); $k++) { $lines[$k] = preg_replace("|^" . $chr . "{" . $count . "}|", "", $lines[$k]); } return implode("\n", $lines); } /** * @brief Get byte size returned in a Data Measurement (KB, MB, GB) * * @param int $bytes The number of bytes to be measured * @param int $precision Optional. Default 2. * * @return string Size with measured units. */ public static function formatBytes($bytes, $precision = 2) { $units = ['B', 'KB', 'MB', 'GB', 'TB']; $bytes = max($bytes, 0); $pow = floor(($bytes ? log($bytes) : 0) / log(1024)); $pow = min($pow, count($units) - 1); $bytes /= pow(1024, $pow); return round($bytes, $precision) . ' ' . $units[$pow]; } /** * @brief Protect percent characters in sprintf calls * * @param string $s String to transform. * * @return string Transformed string. */ public static function protectSprintf($s) { return str_replace('%', '%%', $s); } /** * @brief Base64 Encode URL and translate +/ to -_ Optionally strip padding. * * @param string $s URL to encode * @param boolean $strip_padding Optional. Default false * * @return string Encoded URL */ public static function base64UrlEncode($s, $strip_padding = false) { $s = strtr(base64_encode($s), '+/', '-_'); if ($strip_padding) { $s = str_replace('=', '', $s); } return $s; } /** * @brief Decode Base64 Encoded URL and translate -_ to +/ * @param string $s URL to decode * * @return string Decoded URL * @throws \Exception */ public static function base64UrlDecode($s) { if (is_array($s)) { Logger::log('base64url_decode: illegal input: ' . print_r(debug_backtrace(), true)); return $s; } /* * // Placeholder for new rev of salmon which strips base64 padding. * // PHP base64_decode handles the un-padded input without requiring this step * // Uncomment if you find you need it. * * $l = strlen($s); * if (!strpos($s,'=')) { * $m = $l % 4; * if ($m == 2) * $s .= '=='; * if ($m == 3) * $s .= '='; * } * */ return base64_decode(strtr($s, '-_', '+/')); } /** * @brief Normalize url * * @param string $url URL to be normalized. * * @return string Normalized URL. */ public static function normaliseLink($url) { $ret = str_replace(['https:', '//www.'], ['http:', '//'], $url); return rtrim($ret, '/'); } /** * @brief Normalize OpenID identity * * @param string $s OpenID Identity * * @return string normalized OpenId Identity */ public static function normaliseOpenID($s) { return trim(str_replace(['http://', 'https://'], ['', ''], $s), '/'); } /** * @brief Compare two URLs to see if they are the same, but ignore * slight but hopefully insignificant differences such as if one * is https and the other isn't, or if one is www.something and * the other isn't - and also ignore case differences. * * @param string $a first url * @param string $b second url * @return boolean True if the URLs match, otherwise False * */ public static function compareLink($a, $b) { return (strcasecmp(self::normaliseLink($a), self::normaliseLink($b)) === 0); } /** * Ensures the provided URI has its query string punctuation in order. * * @param string $uri * @return string */ public static function ensureQueryParameter($uri) { if (strpos($uri, '?') === false && ($pos = strpos($uri, '&')) !== false) { $uri = substr($uri, 0, $pos) . '?' . substr($uri, $pos + 1); } return $uri; } /** * Check if the trimmed provided string is starting with one of the provided characters * * @param string $string * @param array $chars * @return bool */ public static function startsWith($string, array $chars) { $return = in_array(substr(trim($string), 0, 1), $chars); return $return; } /** * Returns the regular expression string to match URLs in a given text * * @return string * @see https://daringfireball.net/2010/07/improved_regex_for_matching_urls */ public static function autoLinkRegEx() { return '@ (??«»“”‘’.] # Domain can\'t start with a . [^/\s\xA0`!()\[\]{};:\'",<>?«»“”‘’]+ # Domain can\'t end with a . \. [^/\s\xA0`!()\[\]{};:\'".,<>?«»“”‘’]+/? # Followed by a slash ) (?: # One or more: [^\s\xA0()<>]+ # Run of non-space, non-()<> | # or \(([^\s\xA0()<>]+|(\([^\s()<>]+\)))*\) # balanced parens, up to 2 levels | # or [^\s\xA0`!()\[\]{};:\'".,<>?«»“”‘’] # not a space or one of these punct chars )* )@xiu'; } /** * Ensures a single path item doesn't contain any path-traversing characters * * @see https://stackoverflow.com/a/46097713 * @param string $pathItem * @return string */ public static function sanitizeFilePathItem($pathItem) { $pathItem = str_replace('/', '_', $pathItem); $pathItem = str_replace('\\', '_', $pathItem); $pathItem = str_replace(DIRECTORY_SEPARATOR, '_', $pathItem); // In case it does not equal the standard values return $pathItem; } }