512 lines
14 KiB
PHP
512 lines
14 KiB
PHP
<?php
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/**
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* strings.php
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*
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* Copyright (c) 1999-2002 The SquirrelMail Project Team
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* Licensed under the GNU GPL. For full terms see the file COPYING.
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*
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* This code provides various string manipulation functions that are
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* used by the rest of the Squirrelmail code.
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*
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* $Id$
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*/
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/**
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* SquirrelMail version number -- DO NOT CHANGE
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*/
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global $version;
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$version = '1.3.3 [CVS-DEVEL]';
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/**
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* Wraps text at $wrap characters
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*
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* Has a problem with special HTML characters, so call this before
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* you do character translation.
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*
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* Specifically, ' comes up as 5 characters instead of 1.
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* This should not add newlines to the end of lines.
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*/
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function sqWordWrap(&$line, $wrap) {
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ereg("^([\t >]*)([^\t >].*)?$", $line, $regs);
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$beginning_spaces = $regs[1];
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if (isset($regs[2])) {
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$words = explode(' ', $regs[2]);
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} else {
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$words = '';
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}
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$i = 0;
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$line = $beginning_spaces;
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while ($i < count($words)) {
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/* Force one word to be on a line (minimum) */
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$line .= $words[$i];
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$line_len = strlen($beginning_spaces) + strlen($words[$i]) + 2;
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if (isset($words[$i + 1]))
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$line_len += strlen($words[$i + 1]);
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$i ++;
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/* Add more words (as long as they fit) */
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while ($line_len < $wrap && $i < count($words)) {
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$line .= ' ' . $words[$i];
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$i++;
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if (isset($words[$i]))
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$line_len += strlen($words[$i]) + 1;
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else
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$line_len += 1;
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}
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/* Skip spaces if they are the first thing on a continued line */
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while (!isset($words[$i]) && $i < count($words)) {
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$i ++;
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}
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/* Go to the next line if we have more to process */
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if ($i < count($words)) {
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$line .= "\n";
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}
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}
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}
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/**
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* Does the opposite of sqWordWrap()
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*/
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function sqUnWordWrap(&$body) {
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$lines = explode("\n", $body);
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$body = '';
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$PreviousSpaces = '';
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$cnt = count($lines);
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for ($i = 0; $i < $cnt; $i ++) {
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preg_match("/^([\t >]*)([^\t >].*)?$/", $lines[$i], $regs);
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$CurrentSpaces = $regs[1];
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if (isset($regs[2])) {
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$CurrentRest = $regs[2];
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} else {
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$CurrentRest = '';
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}
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if ($i == 0) {
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$PreviousSpaces = $CurrentSpaces;
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$body = $lines[$i];
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} else if (($PreviousSpaces == $CurrentSpaces) /* Do the beginnings match */
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&& (strlen($lines[$i - 1]) > 65) /* Over 65 characters long */
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&& strlen($CurrentRest)) { /* and there's a line to continue with */
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$body .= ' ' . $CurrentRest;
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} else {
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$body .= "\n" . $lines[$i];
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$PreviousSpaces = $CurrentSpaces;
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}
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}
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$body .= "\n";
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}
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/**
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* If $haystack is a full mailbox name and $needle is the mailbox
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* separator character, returns the last part of the mailbox name.
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*/
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function readShortMailboxName($haystack, $needle) {
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if ($needle == '') {
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$elem = $haystack;
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} else {
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$parts = explode($needle, $haystack);
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$elem = array_pop($parts);
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while ($elem == '' && count($parts)) {
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$elem = array_pop($parts);
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}
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}
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return( $elem );
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}
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/**
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* Returns an array of email addresses.
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* Be cautious of "user@host.com"
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*/
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function parseAddrs($text) {
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if (trim($text) == '')
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return array();
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$text = str_replace(' ', '', $text);
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$text = ereg_replace('"[^"]*"', '', $text);
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$text = ereg_replace('\\([^\\)]*\\)', '', $text);
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$text = str_replace(',', ';', $text);
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$array = explode(';', $text);
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for ($i = 0; $i < count ($array); $i++) {
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$array[$i] = eregi_replace ('^.*[<]', '', $array[$i]);
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$array[$i] = eregi_replace ('[>].*$', '', $array[$i]);
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}
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return $array;
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}
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/**
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* Returns a line of comma separated email addresses from an array.
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*/
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function getLineOfAddrs($array) {
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if (is_array($array)) {
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$to_line = implode(', ', $array);
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$to_line = ereg_replace(', (, )+', ', ', $to_line);
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$to_line = trim(ereg_replace('^, ', '', $to_line));
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if( substr( $to_line, -1 ) == ',' )
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$to_line = substr( $to_line, 0, -1 );
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} else {
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$to_line = '';
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}
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return( $to_line );
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}
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function php_self () {
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global $PHP_SELF, $_SERVER;
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if (isset($_SERVER['REQUEST_URI']) && !empty($_SERVER['REQUEST_URI']) ) {
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return $_SERVER['REQUEST_URI'];
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}
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if (isset($PHP_SELF) && !empty($PHP_SELF)) {
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return $PHP_SELF;
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} else if (isset($_SERVER['PHP_SELF']) &&
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!empty($_SERVER['PHP_SELF'])) {
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return $_SERVER['PHP_SELF'];
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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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* This determines the location to forward to relative to your server.
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* If this doesnt work correctly for you (although it should), you can
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* remove all this code except the last two lines, and change the header()
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* function to look something like this, customized to the location of
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* SquirrelMail on your server:
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*
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* http://www.myhost.com/squirrelmail/src/login.php
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*/
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function get_location () {
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global $_SERVER, $imap_server_type;
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/* Get the path, handle virtual directories */
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$path = substr(php_self(), 0, strrpos(php_self(), '/'));
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/* Check if this is a HTTPS or regular HTTP request. */
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$proto = 'http://';
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/*
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* If you have 'SSLOptions +StdEnvVars' in your apache config
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* OR if you have HTTPS in your HTTP_SERVER_VARS
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* OR if you are on port 443
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*/
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$getEnvVar = getenv('HTTPS');
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if ((isset($getEnvVar) && !strcasecmp($getEnvVar, 'on')) ||
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(isset($_SERVER['HTTPS'])) ||
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(isset($_SERVER['SERVER_PORT']) &&
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$_SERVER['SERVER_PORT'] == 443)) {
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$proto = 'https://';
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}
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/* Get the hostname from the Host header or server config. */
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$host = '';
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if (isset($_SERVER['HTTP_HOST']) && !empty($_SERVER['HTTP_HOST'])) {
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$host = $_SERVER['HTTP_HOST'];
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} else if (isset($_SERVER['SERVER_NAME']) &&
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!empty($_SERVER['SERVER_NAME'])) {
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}
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$port = '';
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if (! strstr($host, ':')) {
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if (isset($_SERVER['SERVER_PORT'])) {
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if (($_SERVER['SERVER_PORT'] != 80 && $proto == 'http://')
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|| ($_SERVER['SERVER_PORT'] != 443 && $proto == 'https://')) {
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$port = sprintf(':%d', $_SERVER['SERVER_PORT']);
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}
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}
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}
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/* this is a workaround for the weird macosx caching that
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causes Apache to return 16080 as the port number, which causes
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SM to bail */
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if ($imap_server_type == 'macosx' && $port == ':16080') {
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$port = '';
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}
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/* Fallback is to omit the server name and use a relative */
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/* URI, although this is not RFC 2616 compliant. */
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return ($host ? $proto . $host . $port . $path : $path);
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}
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/**
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* These functions are used to encrypt the passowrd before it is
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* stored in a cookie.
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*/
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function OneTimePadEncrypt ($string, $epad) {
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$pad = base64_decode($epad);
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$encrypted = '';
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for ($i = 0; $i < strlen ($string); $i++) {
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$encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
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}
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return base64_encode($encrypted);
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}
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function OneTimePadDecrypt ($string, $epad) {
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$pad = base64_decode($epad);
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$encrypted = base64_decode ($string);
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$decrypted = '';
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for ($i = 0; $i < strlen ($encrypted); $i++) {
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$decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
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}
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return $decrypted;
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}
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/**
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* Randomize the mt_rand() function. Toss this in strings or integers
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* and it will seed the generator appropriately. With strings, it is
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* better to get them long. Use md5() to lengthen smaller strings.
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*/
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function sq_mt_seed($Val) {
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/* if mt_getrandmax() does not return a 2^n - 1 number,
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this might not work well. This uses $Max as a bitmask. */
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$Max = mt_getrandmax();
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if (! is_int($Val)) {
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if (function_exists('crc32')) {
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$Val = crc32($Val);
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} else {
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$Str = $Val;
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$Pos = 0;
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$Val = 0;
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$Mask = $Max / 2;
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$HighBit = $Max ^ $Mask;
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while ($Pos < strlen($Str)) {
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if ($Val & $HighBit) {
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$Val = (($Val & $Mask) << 1) + 1;
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} else {
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$Val = ($Val & $Mask) << 1;
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}
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$Val ^= $Str[$Pos];
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$Pos ++;
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}
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}
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}
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if ($Val < 0) {
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$Val *= -1;
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}
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if ($Val = 0) {
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return;
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}
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mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
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}
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/**
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* This function initializes the random number generator fairly well.
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* It also only initializes it once, so you don't accidentally get
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* the same 'random' numbers twice in one session.
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*/
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function sq_mt_randomize() {
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global $_SERVER;
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static $randomized;
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if ($randomized) {
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return;
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}
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/* Global. */
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sq_mt_seed((int)((double) microtime() * 1000000));
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sq_mt_seed(md5($_SERVER['REMOTE_PORT'] . $_SERVER['REMOTE_ADDR'] . getmypid()));
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/* getrusage */
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if (function_exists('getrusage')) {
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/* Avoid warnings with Win32 */
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$dat = @getrusage();
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if (isset($dat) && is_array($dat)) {
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$Str = '';
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foreach ($dat as $k => $v)
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{
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$Str .= $k . $v;
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}
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sq_mt_seed(md5($Str));
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}
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}
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if(isset($_SERVER['UNIQUE_ID'])) {
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sq_mt_seed(md5($_SERVER['UNIQUE_ID']));
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}
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$randomized = 1;
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}
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function OneTimePadCreate ($length=100) {
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sq_mt_randomize();
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$pad = '';
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for ($i = 0; $i < $length; $i++) {
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$pad .= chr(mt_rand(0,255));
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}
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return base64_encode($pad);
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}
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/**
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* Check if we have a required PHP-version. Return TRUE if we do,
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* or FALSE if we don't.
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*
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* To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
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* To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
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*
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* Does not handle betas like 4.0.1b1 or development versions
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*/
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function sqCheckPHPVersion($major, $minor, $release) {
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$ver = phpversion();
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eregi('^([0-9]+)\\.([0-9]+)(.*)', $ver, $regs);
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/* Parse the version string. */
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$vmajor = strval($regs[1]);
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$vminor = strval($regs[2]);
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$vrel = $regs[3];
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if($vrel[0] == '.') {
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$vrel = strval(substr($vrel, 1));
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}
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if($vrel[0] == 'b' || $vrel[0] == 'B') {
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$vrel = - strval(substr($vrel, 1));
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}
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if($vrel[0] == 'r' || $vrel[0] == 'R') {
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$vrel = - strval(substr($vrel, 2))/10;
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}
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/* Compare major version. */
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if ($vmajor < $major) { return false; }
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if ($vmajor > $major) { return true; }
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/* Major is the same. Compare minor. */
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if ($vminor < $minor) { return false; }
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if ($vminor > $minor) { return true; }
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/* Major and minor is the same as the required one. Compare release */
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if ($vrel >= 0 && $release >= 0) { /* Neither are beta */
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if($vrel < $release) return false;
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} else if($vrel >= 0 && $release < 0) { /* This is not beta, required is beta */
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return true;
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} else if($vrel < 0 && $release >= 0){ /* This is beta, require not beta */
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return false;
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} else { /* Both are beta */
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if($vrel > $release) return false;
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}
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return true;
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}
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/**
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* Returns a string showing the size of the message/attachment.
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*/
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function show_readable_size($bytes) {
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$bytes /= 1024;
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$type = 'k';
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if ($bytes / 1024 > 1) {
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$bytes /= 1024;
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$type = 'm';
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}
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if ($bytes < 10) {
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$bytes *= 10;
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settype($bytes, 'integer');
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$bytes /= 10;
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} else {
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settype($bytes, 'integer');
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}
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return $bytes . '<small> ' . $type . '</small>';
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}
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/**
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* Generates a random string from the caracter set you pass in
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*
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* Flags:
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* 1 = add lowercase a-z to $chars
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* 2 = add uppercase A-Z to $chars
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* 4 = add numbers 0-9 to $chars
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*/
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function GenerateRandomString($size, $chars, $flags = 0) {
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if ($flags & 0x1) {
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$chars .= 'abcdefghijklmnopqrstuvwxyz';
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}
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if ($flags & 0x2) {
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$chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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}
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if ($flags & 0x4) {
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$chars .= '0123456789';
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}
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if (($size < 1) || (strlen($chars) < 1)) {
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return '';
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}
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sq_mt_randomize(); /* Initialize the random number generator */
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$String = '';
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$j = strlen( $chars ) - 1;
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while (strlen($String) < $size) {
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$String .= $chars{mt_rand(0, $j)};
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}
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return $String;
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}
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function quoteIMAP($str) {
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return ereg_replace('(["\\])', '\\\\1', $str);
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}
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/**
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* Trims every element in the array
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*/
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function TrimArray(&$array) {
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foreach ($array as $k => $v) {
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global $$k;
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if (is_array($$k)) {
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foreach ($$k as $k2 => $v2) {
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$$k[$k2] = substr($v2, 1);
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}
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} else {
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$$k = substr($v, 1);
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}
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/* Re-assign back to array. */
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$array[$k] = $$k;
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}
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}
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/**
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* Removes slashes from every element in the array
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*/
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function RemoveSlashes(&$array) {
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foreach ($array as $k => $v) {
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global $$k;
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if (is_array($$k)) {
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foreach ($$k as $k2 => $v2) {
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$newArray[stripslashes($k2)] = stripslashes($v2);
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}
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$$k = $newArray;
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} else {
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$$k = stripslashes($v);
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}
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/* Re-assign back to the array. */
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$array[$k] = $$k;
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}
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}
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$PHP_SELF = php_self();
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?>
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