731 lines
20 KiB
PHP
731 lines
20 KiB
PHP
<?php
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
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* Things which should be in the core API *
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\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/**
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* Remove an item from an array
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*/
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function array_remove(array $array, $to_remove): array
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{
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$array = array_unique($array);
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$a2 = [];
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foreach ($array as $existing) {
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if ($existing != $to_remove) {
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$a2[] = $existing;
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}
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}
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return $a2;
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}
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/**
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* Adds an item to an array.
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*
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* Also removes duplicate values from the array.
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*/
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function array_add(array $array, $element): array
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{
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// Could we just use array_push() ?
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// http://www.php.net/manual/en/function.array-push.php
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$array[] = $element;
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$array = array_unique($array);
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return $array;
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}
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/**
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* Return the unique elements of an array, case insensitively
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*/
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function array_iunique(array $array): array
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{
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$ok = [];
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foreach ($array as $element) {
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$found = false;
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foreach ($ok as $existing) {
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if (strtolower($element) == strtolower($existing)) {
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$found = true;
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break;
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}
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}
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if (!$found) {
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$ok[] = $element;
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}
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}
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return $ok;
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}
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/**
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* Figure out if an IP is in a specified range
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*
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* from http://uk.php.net/network
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*/
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function ip_in_range(string $IP, string $CIDR): bool
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{
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list($net, $mask) = explode("/", $CIDR);
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$ip_net = ip2long($net);
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$ip_mask = ~((1 << (32 - $mask)) - 1);
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$ip_ip = ip2long($IP);
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$ip_ip_net = $ip_ip & $ip_mask;
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return ($ip_ip_net == $ip_net);
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}
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/**
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* Delete an entire file heirachy
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*
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* from a patch by Christian Walde; only intended for use in the
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* "extension manager" extension, but it seems to fit better here
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*/
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function deltree(string $f): void
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{
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//Because Windows (I know, bad excuse)
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if (PHP_OS === 'WINNT') {
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$real = realpath($f);
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$path = realpath('./').'\\'.str_replace('/', '\\', $f);
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if ($path != $real) {
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rmdir($path);
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} else {
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foreach (glob($f.'/*') as $sf) {
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if (is_dir($sf) && !is_link($sf)) {
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deltree($sf);
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} else {
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unlink($sf);
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}
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}
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rmdir($f);
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}
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} else {
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if (is_link($f)) {
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unlink($f);
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} elseif (is_dir($f)) {
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foreach (glob($f.'/*') as $sf) {
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if (is_dir($sf) && !is_link($sf)) {
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deltree($sf);
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} else {
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unlink($sf);
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}
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}
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rmdir($f);
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}
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}
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}
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/**
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* Copy an entire file hierarchy
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*
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* from a comment on http://uk.php.net/copy
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*/
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function full_copy(string $source, string $target): void
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{
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if (is_dir($source)) {
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@mkdir($target);
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$d = dir($source);
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while (false !== ($entry = $d->read())) {
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if ($entry == '.' || $entry == '..') {
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continue;
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}
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$Entry = $source . '/' . $entry;
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if (is_dir($Entry)) {
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full_copy($Entry, $target . '/' . $entry);
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continue;
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}
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copy($Entry, $target . '/' . $entry);
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}
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$d->close();
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} else {
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copy($source, $target);
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}
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}
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/**
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* Return a list of all the regular files in a directory and subdirectories
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*/
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function list_files(string $base, string $_sub_dir=""): array
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{
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assert(is_dir($base));
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$file_list = [];
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$files = [];
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$dir = opendir("$base/$_sub_dir");
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while ($f = readdir($dir)) {
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$files[] = $f;
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}
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closedir($dir);
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sort($files);
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foreach ($files as $filename) {
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$full_path = "$base/$_sub_dir/$filename";
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if (is_link($full_path)) {
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// ignore
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} elseif (is_dir($full_path)) {
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if (!($filename == "." || $filename == "..")) {
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//subdirectory found
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$file_list = array_merge(
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$file_list,
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list_files($base, "$_sub_dir/$filename")
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);
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}
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} else {
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$full_path = str_replace("//", "/", $full_path);
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$file_list[] = $full_path;
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}
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}
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return $file_list;
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}
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if (!function_exists('http_parse_headers')) { #http://www.php.net/manual/en/function.http-parse-headers.php#112917
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/**
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* #return string[]
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*/
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function http_parse_headers(string $raw_headers): array
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{
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$headers = []; // $headers = [];
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foreach (explode("\n", $raw_headers) as $i => $h) {
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$h = explode(':', $h, 2);
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if (isset($h[1])) {
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if (!isset($headers[$h[0]])) {
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$headers[$h[0]] = trim($h[1]);
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} elseif (is_array($headers[$h[0]])) {
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$tmp = array_merge($headers[$h[0]], [trim($h[1])]);
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$headers[$h[0]] = $tmp;
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} else {
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$tmp = array_merge([$headers[$h[0]]], [trim($h[1])]);
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$headers[$h[0]] = $tmp;
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}
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}
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}
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return $headers;
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}
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}
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/**
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* HTTP Headers can sometimes be lowercase which will cause issues.
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* In cases like these, we need to make sure to check for them if the camelcase version does not exist.
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*/
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function findHeader(array $headers, string $name): ?string
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{
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if (!is_array($headers)) {
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return null;
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}
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$header = null;
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if (array_key_exists($name, $headers)) {
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$header = $headers[$name];
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} else {
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$headers = array_change_key_case($headers); // convert all to lower case.
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$lc_name = strtolower($name);
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if (array_key_exists($lc_name, $headers)) {
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$header = $headers[$lc_name];
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}
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}
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return $header;
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}
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if (!function_exists('mb_strlen')) {
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// TODO: we should warn the admin that they are missing multibyte support
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function mb_strlen($str, $encoding)
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{
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return strlen($str);
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}
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function mb_internal_encoding($encoding)
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{
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}
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function mb_strtolower($str)
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{
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return strtolower($str);
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}
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}
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const MIME_TYPE_MAP = [
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'jpg' => 'image/jpeg', 'gif' => 'image/gif', 'png' => 'image/png',
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'tif' => 'image/tiff', 'tiff' => 'image/tiff', 'ico' => 'image/x-icon',
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'swf' => 'application/x-shockwave-flash', 'video/x-flv' => 'flv',
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'svg' => 'image/svg+xml', 'pdf' => 'application/pdf',
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'zip' => 'application/zip', 'gz' => 'application/x-gzip',
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'tar' => 'application/x-tar', 'bz' => 'application/x-bzip',
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'bz2' => 'application/x-bzip2', 'txt' => 'text/plain',
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'asc' => 'text/plain', 'htm' => 'text/html', 'html' => 'text/html',
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'css' => 'text/css', 'js' => 'text/javascript',
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'xml' => 'text/xml', 'xsl' => 'application/xsl+xml',
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'ogg' => 'application/ogg', 'mp3' => 'audio/mpeg', 'wav' => 'audio/x-wav',
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'avi' => 'video/x-msvideo', 'mpg' => 'video/mpeg', 'mpeg' => 'video/mpeg',
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'mov' => 'video/quicktime', 'flv' => 'video/x-flv', 'php' => 'text/x-php',
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'mp4' => 'video/mp4', 'ogv' => 'video/ogg', 'webm' => 'video/webm',
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'webp' => 'image/webp'
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];
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/**
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* Get MIME type for file
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*
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* The contents of this function are taken from the __getMimeType() function
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* from the "Amazon S3 PHP class" which is Copyright (c) 2008, Donovan Schönknecht
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* and released under the 'Simplified BSD License'.
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*/
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function getMimeType(string $file, string $ext=""): string
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{
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// Static extension lookup
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$ext = strtolower($ext);
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if (array_key_exists($ext, MIME_TYPE_MAP)) {
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return MIME_TYPE_MAP[$ext];
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}
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$type = false;
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// Fileinfo documentation says fileinfo_open() will use the
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// MAGIC env var for the magic file
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if (extension_loaded('fileinfo') && isset($_ENV['MAGIC']) &&
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($finfo = finfo_open(FILEINFO_MIME, $_ENV['MAGIC'])) !== false) {
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if (($type = finfo_file($finfo, $file)) !== false) {
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// Remove the charset and grab the last content-type
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$type = explode(' ', str_replace('; charset=', ';charset=', $type));
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$type = array_pop($type);
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$type = explode(';', $type);
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$type = trim(array_shift($type));
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}
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finfo_close($finfo);
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// If anyone is still using mime_content_type()
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} elseif (function_exists('mime_content_type')) {
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$type = trim(mime_content_type($file));
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}
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if ($type !== false && strlen($type) > 0) {
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return $type;
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}
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return 'application/octet-stream';
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}
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function get_extension(?string $mime_type): ?string
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{
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if (empty($mime_type)) {
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return null;
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}
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$ext = array_search($mime_type, MIME_TYPE_MAP);
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return ($ext ? $ext : null);
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}
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/**
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* Like glob, with support for matching very long patterns with braces.
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*/
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function zglob(string $pattern): array
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{
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$results = [];
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if (preg_match('/(.*)\{(.*)\}(.*)/', $pattern, $matches)) {
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$braced = explode(",", $matches[2]);
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foreach ($braced as $b) {
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$sub_pattern = $matches[1].$b.$matches[3];
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$results = array_merge($results, zglob($sub_pattern));
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}
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return $results;
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} else {
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$r = glob($pattern);
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if ($r) {
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return $r;
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} else {
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return [];
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}
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}
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}
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/**
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* Figure out the path to the shimmie install directory.
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*
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* eg if shimmie is visible at http://foo.com/gallery, this
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* function should return /gallery
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*
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* PHP really, really sucks.
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*/
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function get_base_href(): string
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{
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if (defined("BASE_HREF")) {
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return BASE_HREF;
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}
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$possible_vars = ['SCRIPT_NAME', 'PHP_SELF', 'PATH_INFO', 'ORIG_PATH_INFO'];
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$ok_var = null;
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foreach ($possible_vars as $var) {
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if (isset($_SERVER[$var]) && substr($_SERVER[$var], -4) === '.php') {
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$ok_var = $_SERVER[$var];
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break;
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}
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}
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assert(!empty($ok_var));
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$dir = dirname($ok_var);
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$dir = str_replace("\\", "/", $dir);
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$dir = str_replace("//", "/", $dir);
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$dir = rtrim($dir, "/");
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return $dir;
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}
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function startsWith(string $haystack, string $needle): bool
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{
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$length = strlen($needle);
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return (substr($haystack, 0, $length) === $needle);
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}
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function endsWith(string $haystack, string $needle): bool
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{
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$length = strlen($needle);
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$start = $length * -1; //negative
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return (substr($haystack, $start) === $needle);
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}
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
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* Input / Output Sanitising *
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\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/**
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* Make some data safe for printing into HTML
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*/
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function html_escape(?string $input): string
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{
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if (is_null($input)) {
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return "";
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}
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return htmlentities($input, ENT_QUOTES, "UTF-8");
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}
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/**
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* Unescape data that was made safe for printing into HTML
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*/
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function html_unescape(string $input): string
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{
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return html_entity_decode($input, ENT_QUOTES, "UTF-8");
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}
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|
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/**
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* Make sure some data is safe to be used in integer context
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*/
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function int_escape(?string $input): int
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{
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/*
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Side note, Casting to an integer is FASTER than using intval.
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http://hakre.wordpress.com/2010/05/13/php-casting-vs-intval/
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*/
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if (is_null($input)) {
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return 0;
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}
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return (int)$input;
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}
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|
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/**
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* Make sure some data is safe to be used in URL context
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*/
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function url_escape(?string $input): string
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{
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/*
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Shish: I have a feeling that these three lines are important, possibly for searching for tags with slashes in them like fate/stay_night
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green-ponies: indeed~
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$input = str_replace('^', '^^', $input);
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$input = str_replace('/', '^s', $input);
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$input = str_replace('\\', '^b', $input);
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|
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/* The function idn_to_ascii is used to support Unicode domains / URLs as well.
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See here for more: http://php.net/manual/en/function.filter-var.php
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However, it is only supported by PHP version 5.3 and up
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|
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if (function_exists('idn_to_ascii')) {
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return filter_var(idn_to_ascii($input), FILTER_SANITIZE_URL);
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} else {
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return filter_var($input, FILTER_SANITIZE_URL);
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}
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*/
|
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if (is_null($input)) {
|
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return "";
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}
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$input = str_replace('^', '^^', $input);
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$input = str_replace('/', '^s', $input);
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$input = str_replace('\\', '^b', $input);
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$input = rawurlencode($input);
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return $input;
|
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}
|
|
|
|
/**
|
|
* Make sure some data is safe to be used in SQL context
|
|
*/
|
|
function sql_escape(string $input): string
|
|
{
|
|
global $database;
|
|
return $database->escape($input);
|
|
}
|
|
|
|
|
|
/**
|
|
* Turn all manner of HTML / INI / JS / DB booleans into a PHP one
|
|
*/
|
|
function bool_escape($input): bool
|
|
{
|
|
/*
|
|
Sometimes, I don't like PHP -- this, is one of those times...
|
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"a boolean FALSE is not considered a valid boolean value by this function."
|
|
Yay for Got'chas!
|
|
http://php.net/manual/en/filter.filters.validate.php
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|
*/
|
|
if (is_bool($input)) {
|
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return $input;
|
|
} elseif (is_numeric($input)) {
|
|
return ($input === 1);
|
|
} else {
|
|
$value = filter_var($input, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
|
|
if (!is_null($value)) {
|
|
return $value;
|
|
} else {
|
|
$input = strtolower(trim($input));
|
|
return (
|
|
$input === "y" ||
|
|
$input === "yes" ||
|
|
$input === "t" ||
|
|
$input === "true" ||
|
|
$input === "on" ||
|
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$input === "1"
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Some functions require a callback function for escaping,
|
|
* but we might not want to alter the data
|
|
*/
|
|
function no_escape(string $input): string
|
|
{
|
|
return $input;
|
|
}
|
|
|
|
function clamp(?int $val, ?int $min=null, ?int $max=null): int
|
|
{
|
|
if (!is_numeric($val) || (!is_null($min) && $val < $min)) {
|
|
$val = $min;
|
|
}
|
|
if (!is_null($max) && $val > $max) {
|
|
$val = $max;
|
|
}
|
|
if (!is_null($min) && !is_null($max)) {
|
|
assert($val >= $min && $val <= $max, "$min <= $val <= $max");
|
|
}
|
|
return $val;
|
|
}
|
|
|
|
function xml_tag(string $name, array $attrs=[], array $children=[]): string
|
|
{
|
|
$xml = "<$name ";
|
|
foreach ($attrs as $k => $v) {
|
|
$xv = str_replace(''', ''', htmlspecialchars($v, ENT_QUOTES));
|
|
$xml .= "$k=\"$xv\" ";
|
|
}
|
|
if (count($children) > 0) {
|
|
$xml .= ">\n";
|
|
foreach ($children as $child) {
|
|
$xml .= xml_tag($child);
|
|
}
|
|
$xml .= "</$name>\n";
|
|
} else {
|
|
$xml .= "/>\n";
|
|
}
|
|
return $xml;
|
|
}
|
|
|
|
/**
|
|
* Original PHP code by Chirp Internet: www.chirp.com.au
|
|
* Please acknowledge use of this code by including this header.
|
|
*/
|
|
function truncate(string $string, int $limit, string $break=" ", string $pad="..."): string
|
|
{
|
|
// return with no change if string is shorter than $limit
|
|
if (strlen($string) <= $limit) {
|
|
return $string;
|
|
}
|
|
|
|
// is $break present between $limit and the end of the string?
|
|
if (false !== ($breakpoint = strpos($string, $break, $limit))) {
|
|
if ($breakpoint < strlen($string) - 1) {
|
|
$string = substr($string, 0, $breakpoint) . $pad;
|
|
}
|
|
}
|
|
|
|
return $string;
|
|
}
|
|
|
|
/**
|
|
* Turn a human readable filesize into an integer, eg 1KB -> 1024
|
|
*/
|
|
function parse_shorthand_int(string $limit): int
|
|
{
|
|
if (preg_match('/^([\d\.]+)([gmk])?b?$/i', (string)$limit, $m)) {
|
|
$value = $m[1];
|
|
if (isset($m[2])) {
|
|
switch (strtolower($m[2])) {
|
|
/** @noinspection PhpMissingBreakStatementInspection */
|
|
case 'g': $value *= 1024; // fall through
|
|
/** @noinspection PhpMissingBreakStatementInspection */
|
|
// no break
|
|
case 'm': $value *= 1024; // fall through
|
|
/** @noinspection PhpMissingBreakStatementInspection */
|
|
// no break
|
|
case 'k': $value *= 1024; break;
|
|
default: $value = -1;
|
|
}
|
|
}
|
|
return (int)$value;
|
|
} else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Turn an integer into a human readable filesize, eg 1024 -> 1KB
|
|
*/
|
|
function to_shorthand_int(int $int): string
|
|
{
|
|
assert($int >= 0);
|
|
|
|
if ($int >= pow(1024, 3)) {
|
|
return sprintf("%.1fGB", $int / pow(1024, 3));
|
|
} elseif ($int >= pow(1024, 2)) {
|
|
return sprintf("%.1fMB", $int / pow(1024, 2));
|
|
} elseif ($int >= 1024) {
|
|
return sprintf("%.1fKB", $int / 1024);
|
|
} else {
|
|
return (string)$int;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Turn a date into a time, a date, an "X minutes ago...", etc
|
|
*/
|
|
function autodate(string $date, bool $html=true): string
|
|
{
|
|
$cpu = date('c', strtotime($date));
|
|
$hum = date('F j, Y; H:i', strtotime($date));
|
|
return ($html ? "<time datetime='$cpu'>$hum</time>" : $hum);
|
|
}
|
|
|
|
/**
|
|
* Check if a given string is a valid date-time. ( Format: yyyy-mm-dd hh:mm:ss )
|
|
*/
|
|
function isValidDateTime(string $dateTime): bool
|
|
{
|
|
if (preg_match("/^(\d{4})-(\d{2})-(\d{2}) ([01][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])$/", $dateTime, $matches)) {
|
|
if (checkdate($matches[2], $matches[3], $matches[1])) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check if a given string is a valid date. ( Format: yyyy-mm-dd )
|
|
*/
|
|
function isValidDate(string $date): bool
|
|
{
|
|
if (preg_match("/^(\d{4})-(\d{2})-(\d{2})$/", $date, $matches)) {
|
|
// checkdate wants (month, day, year)
|
|
if (checkdate($matches[2], $matches[3], $matches[1])) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
function validate_input(array $inputs): array
|
|
{
|
|
$outputs = [];
|
|
|
|
foreach ($inputs as $key => $validations) {
|
|
$flags = explode(',', $validations);
|
|
|
|
if (in_array('bool', $flags) && !isset($_POST[$key])) {
|
|
$_POST[$key] = 'off';
|
|
}
|
|
|
|
if (in_array('optional', $flags)) {
|
|
if (!isset($_POST[$key]) || trim($_POST[$key]) == "") {
|
|
$outputs[$key] = null;
|
|
continue;
|
|
}
|
|
}
|
|
if (!isset($_POST[$key]) || trim($_POST[$key]) == "") {
|
|
throw new InvalidInput("Input '$key' not set");
|
|
}
|
|
|
|
$value = trim($_POST[$key]);
|
|
|
|
if (in_array('user_id', $flags)) {
|
|
$id = int_escape($value);
|
|
if (in_array('exists', $flags)) {
|
|
if (is_null(User::by_id($id))) {
|
|
throw new InvalidInput("User #$id does not exist");
|
|
}
|
|
}
|
|
$outputs[$key] = $id;
|
|
} elseif (in_array('user_name', $flags)) {
|
|
if (strlen($value) < 1) {
|
|
throw new InvalidInput("Username must be at least 1 character");
|
|
} elseif (!preg_match('/^[a-zA-Z0-9-_]+$/', $value)) {
|
|
throw new InvalidInput(
|
|
"Username contains invalid characters. Allowed characters are ".
|
|
"letters, numbers, dash, and underscore"
|
|
);
|
|
}
|
|
$outputs[$key] = $value;
|
|
} elseif (in_array('user_class', $flags)) {
|
|
global $_shm_user_classes;
|
|
if (!array_key_exists($value, $_shm_user_classes)) {
|
|
throw new InvalidInput("Invalid user class: ".html_escape($value));
|
|
}
|
|
$outputs[$key] = $value;
|
|
} elseif (in_array('email', $flags)) {
|
|
$outputs[$key] = trim($value);
|
|
} elseif (in_array('password', $flags)) {
|
|
$outputs[$key] = $value;
|
|
} elseif (in_array('int', $flags)) {
|
|
$value = trim($value);
|
|
if (empty($value) || !is_numeric($value)) {
|
|
throw new InvalidInput("Invalid int: ".html_escape($value));
|
|
}
|
|
$outputs[$key] = (int)$value;
|
|
} elseif (in_array('bool', $flags)) {
|
|
$outputs[$key] = bool_escape($value);
|
|
} elseif (in_array('string', $flags)) {
|
|
if (in_array('trim', $flags)) {
|
|
$value = trim($value);
|
|
}
|
|
if (in_array('lower', $flags)) {
|
|
$value = strtolower($value);
|
|
}
|
|
if (in_array('not-empty', $flags)) {
|
|
throw new InvalidInput("$key must not be blank");
|
|
}
|
|
if (in_array('nullify', $flags)) {
|
|
if (empty($value)) {
|
|
$value = null;
|
|
}
|
|
}
|
|
$outputs[$key] = $value;
|
|
} else {
|
|
throw new InvalidInput("Unknown validation '$validations'");
|
|
}
|
|
}
|
|
|
|
return $outputs;
|
|
}
|