39
validateurl
validate_url
SYNOPSIS
validate_url($url)
DESCRIPTION
CODE
- function validate_url($url) {
- return filter_var($url, FILTER_VALIDATE_URL);
- }
prefix_url
SYNOPSIS
prefix_url($url, $protocol='http')
DESCRIPTION
CODE
- function prefix_url($url, $protocol='http') {
- if (!@parse_url($url, PHP_URL_SCHEME)) {
- $url = $protocol . '://' . $url;
- }
- return $url;
- }
normalize_url
SYNOPSIS
normalize_url($url)
DESCRIPTION
CODE
- function normalize_url($url) {
- $purl = @parse_url($url);
- if (!$purl) {
- return false;
- }
- $scheme=$host=$port=$user=$pass=$path=$query=$fragment=false;
- extract($purl);
- if ($scheme) {
- $scheme = strtolower($scheme);
- }
- if ($host) {
- $host = strtolower($host);
- }
- if ($port and $port == getservbyname($scheme, 'tcp')) {
- $port = false;
- }
- foreach (array('user', 'pass', 'host', 'path') as $p) {
- if ($$p) {
- $$p = preg_replace_callback('/%[0-9a-f]{2}/i', function($m) { return strtoupper($m[0]); }, $$p);
- }
- }
- if ($path) {
- $path = _restore_allowed_chars(_remove_dot_segments($path));
- }
- if ($host && !$path) {
- $path = '/';
- }
- $newurl = $scheme . '://';
- if ($host) {
- if ($user) {
- $newurl .= $user;
- if ($pass) {
- $newurl .= ':' . $pass;
- }
- $newurl .= '@';
- }
- $newurl .= $host;
- if ($port) {
- $newurl .= ':' . $port;
- }
- }
- $newurl .= $path;
- if ($query) {
- $q = array();
- foreach (explode('&', $query) as $s) {
- if ($s and preg_match('/[^=]+=[^=]+/', $s)) {
- $q[] = $s;
- }
- }
- if ($q) {
- sort($q);
- $newurl .= '?' . implode('&', $q);
- }
- }
- if ($fragment) {
- $newurl .= '#' . $fragment;
- }
- return $newurl;
- }
- function _remove_dot_segments($path) {
- $newpath = '';
- $watchdog = 100;
- while ($path && $watchdog-- > 0) {
- if (substr($path, 0, 2) == './') {
- $path = substr($path, 2);
- }
- elseif (substr($path, 0, 3) == '../') {
- $path = substr($path, 3);
- }
- elseif (substr($path, 0, 3) == '/./' || $path == '/.') {
- $path = '/' . substr($path, 3);
- }
- elseif (substr($path, 0, 4) == '/../' || $path == '/..') {
- $path = '/' . substr($path, 4);
- $i = strrpos($newpath, '/');
- $newpath = $i === false ? '' : substr($newpath, 0, $i);
- }
- elseif ($path == '.' || $path == '..') {
- $path = '';
- }
- else {
- $i = strpos($path, '/');
- if ($i === 0) {
- $i = strpos($path, '/', 1);
- }
- if ($i === false) {
- $i = strlen($path);
- }
- $newpath .= substr($path, 0, $i);
- $path = substr($path, $i);
- }
- }
- return $newpath;
- }
- function _restore_allowed_chars($s) {
- $from = array(
- '%41', '%42', '%43', '%44', '%45', '%46', '%47', '%48', '%49', '%4A', '%4B', '%4C', '%4D', '%4E', '%4F', '%50', '%51', '%52', '%53', '%54', '%55', '%56', '%57', '%58', '%59', '%5A',
- '%61', '%62', '%63', '%64', '%65', '%66', '%67', '%68', '%69', '%6A', '%6B', '%6C', '%6D', '%6E', '%6F', '%70', '%71', '%72', '%73', '%74', '%75', '%76', '%77', '%78', '%79', '%7A',
- '%30', '%31', '%32', '%33', '%34', '%35', '%36', '%37', '%38', '%39',
- '%2D', '%2E', '%5F', '%7E'
- );
- $to = array(
- 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
- 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
- '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
- '-', '.', '_', '~'
- );
- return str_replace($from, $to, $s);
- }
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