mirror of
https://github.com/moodle/moodle.git
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117 lines
3.8 KiB
PHP
117 lines
3.8 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Minimalistic library, usable even when no other moodle libs are loaded.
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*
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* The only library that gets loaded if you define ABORT_AFTER_CONFIG
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* before including main config.php. You can resume normal script operation
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* if you define ABORT_AFTER_CONFIG_CANCEL and require the setup.php
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*
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* @package moodlecore
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* @copyright 2009 petr Skoda (skodak)
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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/**
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* Minimalistic parameter validation function.
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* Can not use optional param because moodlelib.php is not loaded yet
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* @param string $name
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* @param mixed $default
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* @param string $type
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* @return mixed
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*/
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function min_optional_param($name, $default, $type) {
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$value = $default;
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if (isset($_GET[$name])) {
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$value = $_GET[$name];
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} else if (isset($_GET['amp;'.$name])) {
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// very, very, very ugly hack, unfortunately $OUTPUT->pix_url() is not used properly in javascript code :-(
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$value = $_GET['amp;'.$name];
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}
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return min_clean_param($value, $type);
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}
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/**
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* Minimalistic parameter cleaning function.
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* Can not use optional param because moodlelib.php is not loaded yet
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* @param string $name
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* @param mixed $default
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* @param string $type
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* @return mixed
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*/
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function min_clean_param($value, $type) {
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switch($type) {
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case 'RAW': break;
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case 'INT': $value = (int)$value;
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break;
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case 'SAFEDIR': $value = preg_replace('/[^a-zA-Z0-9_-]/', '', $value);
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break;
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case 'SAFEPATH': $value = preg_replace('/[^a-zA-Z0-9\/\._-]/', '', $value);
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$value = preg_replace('/\.+/', '.', $value);
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$value = preg_replace('#/+#', '/', $value);
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break;
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default: die("Coding error: incorrect parameter type specified ($type).");
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}
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return $value;
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}
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/**
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* This method tries to enable output compression if possible.
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* This function must be called before any output or headers.
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*
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* (IE6 is not supported at all.)
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*
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* @return boolean, true if compression enabled
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*/
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function min_enable_zlib_compression() {
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if (headers_sent()) {
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return false;
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}
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// zlib.output_compression is preferred over ob_gzhandler()
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if (!empty($_SERVER['HTTP_USER_AGENT'])) {
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$agent = $_SERVER['HTTP_USER_AGENT'];
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// try to detect IE6 and prevent gzip because it is extremely buggy browser
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$parts = explode(';', $agent);
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if (isset($parts[1])) {
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$parts = explode(' ', trim($parts[1]));
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if (count($parts) > 1) {
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if ($parts[0] === 'MSIE' and (float)$parts[1] < 7) {
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@ini_set('zlib.output_compression', '0');
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return false;
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}
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}
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}
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}
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@ini_set('output_handler', '');
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/*
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* docs clearly say 'on' means enable and number means size of buffer,
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* but unfortunately some PHP version break when we set 'on' here.
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* 1 probably sets chunk size to 4096. our CSS and JS scripts are much bigger,
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* so let's try some bigger sizes.
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*/
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@ini_set('zlib.output_compression', 65536);
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return true;
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} |