functions/strings.php

   1 <?php
   2
   3    /* $Id$ */
   4
   5    $strings_php = true;
   6    $fix_form_endlines = false;
   7
   8    // Remove all slashes for form values
   9    if (get_magic_quotes_gpc())
  10    {
  11        global $REQUEST_METHOD;
  12        if ($REQUEST_METHOD == "POST")
  13        {
  14            global $HTTP_POST_VARS;
  15             RemoveSlashes($HTTP_POST_VARS);
  16        }
  17        elseif ($REQUEST_METHOD == "GET")
  18        {
  19            global $HTTP_GET_VARS;
  20             RemoveSlashes($HTTP_GET_VARS);
  21        }
  22    }
  23
  24    // Auto-detection
  25    //
  26    // if $send (the form button's name) contains "\n" as the first char
  27    // and the script is compose.php, then trim everything.  Otherwise,
  28    // we don't have to worry.
  29    global $send, $PHP_SELF;
  30    if (isset($send) && substr($send, 0, 1) == "\n" &&
  31        substr($PHP_SELF, -12) == "/compose.php")
  32    {
  33       if ($REQUEST_METHOD == "POST") {
  34          TrimArray($HTTP_POST_VARS);
  35       } else {
  36          TrimArray($HTTP_GET_VARS);
  37       }
  38    }
  39
  40    //**************************************************************************
  41    // Trims every element in the array
  42    //**************************************************************************
  43    function TrimArray(&$array) {
  44       foreach ($array as $k => $v) {
  45          global $$k;
  46          if (is_array($$k)) {
  47             foreach ($$k as $k2 => $v2) {
  48                $$k[$k2] = substr($v2, 1);
  49             }
  50          } else {
  51             $$k = substr($v, 1);
  52          }
  53       }
  54    }
  55
  56
  57    //**************************************************************************
  58    // Removes slashes from every element in the array
  59    //**************************************************************************
  60    function RemoveSlashes($array)
  61    {
  62        foreach ($array as $k => $v)
  63        {
  64            global $$k;
  65             if (is_array($$k))
  66             {
  67                 foreach ($$k as $k2 => $v2)
  68                 {
  69                     $newArray[stripslashes($k2)] = stripslashes($v2);
  70                 }
  71                 $$k = $newArray;
  72             }
  73             else
  74             {
  75                 $$k = stripslashes($v);
  76             }
  77        }
  78    }
  79
  80
  81    //*************************************************************************
  82    // Count the number of occurances of $needle are in $haystack.
  83    // $needle can be a character or string, and need not occur in $haystack
  84    //*************************************************************************
  85    function countCharInString($haystack, $needle) {
  86       if ($needle == '') return 0;
  87       return count(explode($needle, $haystack));
  88    }
  89
  90    //*************************************************************************
  91    // Read from the back of $haystack until $needle is found, or the begining
  92    //    of the $haystack is reached.  $needle is a single character
  93    //*************************************************************************
  94    function readShortMailboxName($haystack, $needle) {
  95       if ($needle == '') return $haystack;
  96       $parts = explode($needle, $haystack);
  97       $elem = array_pop($parts);
  98       while ($elem == '' && count($parts))
  99       {
 100           $elem = array_pop($parts);
 101       }
 102       return $elem;
 103    }
 104
 105    //*************************************************************************
 106    // Read from the back of $haystack until $needle is found, or the begining
 107    //    of the $haystack is reached.  $needle is a single character
 108    //*************************************************************************
 109    function readMailboxParent($haystack, $needle) {
 110       if ($needle == '') return '';
 111       $parts = explode($needle, $haystack);
 112       $elem = array_pop($parts);
 113       while ($elem == '' && count($parts))
 114       {
 115           $elem = array_pop($parts);
 116       }
 117       return join($needle, $parts);
 118    }
 119
 120    // Searches for the next position in a string minus white space
 121    function next_pos_minus_white ($haystack, $pos) {
 122       while (substr($haystack, $pos, 1) == ' ' ||
 123              substr($haystack, $pos, 1) == "\t" ||
 124              substr($haystack, $pos, 1) == "\n" ||
 125              substr($haystack, $pos, 1) == "\r") {
 126          if ($pos >= strlen($haystack))
 127             return -1;
 128          $pos++;
 129       }
 130       return $pos;
 131    }
 132
 133    // Wraps text at $wrap characters
 134    // Has a problem with special HTML characters, so call this before
 135    // you do character translation.
 136    // Specifically, &#039 comes up as 5 characters instead of 1.
 137    // This should not add newlines to the end of lines.
 138    function sqWordWrap(&$line, $wrap) {
 139       ereg("^([\t >]*)([^\t >].*)?$", $line, $regs);
 140       $beginning_spaces = $regs[1];
 141            if (isset($regs[2])) {
 142          $words = explode(' ', $regs[2]);
 143       } else {
 144          $words = "";
 145            }
 146
 147       $i = 0;
 148       $line = $beginning_spaces;
 149
 150       while ($i < count($words)) {
 151          // Force one word to be on a line (minimum)
 152          $line .= $words[$i];
 153          $line_len = strlen($beginning_spaces) + strlen($words[$i]) + 2;
 154           if (isset($words[$i + 1]))
 155               $line_len += strlen($words[$i + 1]);
 156          $i ++;
 157
 158          // Add more words (as long as they fit)
 159          while ($line_len < $wrap && $i < count($words)) {
 160             $line .= ' ' . $words[$i];
 161             $i++;
 162              if (isset($words[$i]))
 163                 $line_len += strlen($words[$i]) + 1;
 164              else
 165                  $line_len += 1;
 166          }
 167
 168          // Skip spaces if they are the first thing on a continued line
 169          while (!isset($words[$i]) && $i < count($words)) {
 170             $i ++;
 171          }
 172
 173          // Go to the next line if we have more to process
 174          if ($i < count($words)) {
 175             $line .= "\n" . $beginning_spaces;
 176          }
 177       }
 178    }
 179
 180
 181    // Does the opposite of sqWordWrap()
 182    function sqUnWordWrap(&$body)
 183    {
 184        $lines = explode("\n", $body);
 185        $body = "";
 186        $PreviousSpaces = "";
 187        for ($i = 0; $i < count($lines); $i ++)
 188        {
 189            ereg("^([\t >]*)([^\t >].*)?$", $lines[$i], $regs);
 190            $CurrentSpaces = $regs[1];
 191             if (isset($regs[2]))
 192                $CurrentRest = $regs[2];
 193            if ($i == 0)
 194            {
 195                $PreviousSpaces = $CurrentSpaces;
 196                $body = $lines[$i];
 197            }
 198            else if ($PreviousSpaces == $CurrentSpaces &&  // Do the beginnings match
 199                strlen($lines[$i - 1]) > 65 &&             // Over 65 characters long
 200                strlen($CurrentRest))                      // and there's a line to continue with
 201            {
 202                $body .= ' ' . $CurrentRest;
 203            }
 204            else
 205            {
 206                $body .= "\n" . $lines[$i];
 207                $PreviousSpaces = $CurrentSpaces;
 208            }
 209        }
 210        $body .= "\n";
 211    }
 212
 213
 214    /** Returns an array of email addresses **/
 215    /* Be cautious of "user@host.com" */
 216    function parseAddrs($text) {
 217       if (trim($text) == "")
 218          return array();
 219       $text = str_replace(' ', '', $text);
 220       $text = ereg_replace('"[^"]*"', '', $text);
 221       $text = ereg_replace('\\([^\\)]*\\)', '', $text);
 222       $text = str_replace(',', ';', $text);
 223       $array = explode(';', $text);
 224       for ($i = 0; $i < count ($array); $i++) {
 225                                $array[$i] = eregi_replace ("^.*[<]", '', $array[$i]);
 226                                $array[$i] = eregi_replace ("[>].*$", '', $array[$i]);
 227                     }
 228       return $array;
 229    }
 230
 231    /** Returns a line of comma separated email addresses from an array **/
 232    function getLineOfAddrs($array) {
 233       if (is_array($array)) {
 234         $to_line = implode(', ', $array);
 235         $to_line = trim(ereg_replace(', (, )+', ', ', $to_line));
 236       } else {
 237         $to_line = '';
 238       }
 239       return $to_line;
 240    }
 241
 242    function translateText(&$body, $wrap_at, $charset) {
 243       global $where, $what; // from searching
 244                   global $url_parser_php;
 245
 246       if (!isset($url_parser_php)) {
 247          include '../functions/url_parser.php';
 248       }
 249
 250       $body_ary = explode("\n", $body);
 251       $PriorQuotes = 0;
 252       for ($i=0; $i < count($body_ary); $i++) {
 253          $line = $body_ary[$i];
 254          if (strlen($line) - 2 >= $wrap_at) {
 255             sqWordWrap($line, $wrap_at);
 256          }
 257          $line = charset_decode($charset, $line);
 258          $line = str_replace("\t", '        ', $line);
 259
 260          parseUrl ($line);
 261
 262          $Quotes = 0;
 263          $pos = 0;
 264          while (1)
 265          {
 266              if ($line[$pos] == ' ')
 267              {
 268                 $pos ++;
 269              }
 270              else if (strpos($line, '&gt;', $pos) === $pos)
 271              {
 272                 $pos += 4;
 273                 $Quotes ++;
 274              }
 275              else
 276              {
 277                  break;
 278              }
 279          }
 280
 281          if ($Quotes > 1)
 282             $line = '<FONT COLOR="FF0000">'.$line.'</FONT>';
 283          elseif ($Quotes)
 284             $line = '<FONT COLOR="800000">'.$line.'</FONT>';
 285
 286          $body_ary[$i] = $line;
 287       }
 288       $body = '<pre>' . implode("\n", $body_ary) . '</pre>';
 289    }
 290
 291    /* SquirrelMail version number -- DO NOT CHANGE */
 292    $version = '1.0.3 [cvs]';
 293
 294
 295    function find_mailbox_name ($mailbox) {
 296       if (ereg(" *\"([^\r\n\"]*)\"[ \r\n]*$", $mailbox, $regs))
 297           return $regs[1];
 298       ereg(" *([^ \r\n\"]*)[ \r\n]*$",$mailbox,$regs);
 299       return $regs[1];
 300
 301    }
 302
 303    // Depreciated.  :-)  I always wanted to say that.
 304    function replace_spaces ($string) {
 305       return str_replace(' ', '&nbsp;', $string);
 306    }
 307
 308    function get_location () {
 309       # This determines the location to forward to relative
 310       # to your server.  If this doesnt work correctly for
 311       # you (although it should), you can remove all this
 312       # code except the last two lines, and change the header()
 313       # function to look something like this, customized to
 314       # the location of SquirrelMail on your server:
 315       #
 316       #   http://www.myhost.com/squirrelmail/src/login.php
 317
 318       global $PHP_SELF, $SERVER_NAME, $HTTPS, $HTTP_HOST, $SERVER_PORT;
 319
 320       // Get the path
 321       $path = substr($PHP_SELF, 0, strrpos($PHP_SELF, '/'));
 322
 323       // Check if this is a HTTPS or regular HTTP request
 324       $proto = 'http://';
 325       if(isset($HTTPS) && !strcasecmp($HTTPS, 'on') ) {
 326         $proto = 'https://';
 327       }
 328
 329       // Get the hostname from the Host header or server config.
 330       $host = '';
 331       if (isset($HTTP_HOST) && !empty($HTTP_HOST))
 332       {
 333           $host = $HTTP_HOST;
 334       }
 335       else if (isset($SERVER_NAME) && !empty($SERVER_NAME))
 336       {
 337           $host = $SERVER_NAME;
 338       }
 339
 340       $port = '';
 341       if (! strstr($host, ':'))
 342       {
 343           if (isset($SERVER_PORT)) {
 344               if (($SERVER_PORT != 80 && $proto == 'http://')
 345                       || ($SERVER_PORT != 443 && $proto == 'https://')) {
 346                   $port = sprintf(':%d', $SERVER_PORT);
 347               }
 348           }
 349       }
 350
 351       if ($host)
 352           return $proto . $host . $port . $path;
 353
 354       // Fallback is to omit the server name and use a relative URI,
 355       // although this is not RFC 2616 compliant.
 356       return $path;
 357    }
 358
 359
 360    // These functions are used to encrypt the passowrd before it is
 361    // stored in a cookie.
 362    function OneTimePadEncrypt ($string, $epad) {
 363       $pad = base64_decode($epad);
 364       $encrypted = '';
 365       for ($i = 0; $i < strlen ($string); $i++) {
 366           $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 367       }
 368
 369       return base64_encode($encrypted);
 370    }
 371
 372    function OneTimePadDecrypt ($string, $epad) {
 373       $pad = base64_decode($epad);
 374       $encrypted = base64_decode ($string);
 375       $decrypted = '';
 376       for ($i = 0; $i < strlen ($encrypted); $i++) {
 377           $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 378       }
 379
 380       return $decrypted;
 381    }
 382
 383
 384    // Randomize the mt_rand() function.  Toss this in strings or
 385    // integers and it will seed the generator appropriately.
 386    // With strings, it is better to get them long. Use md5() to
 387    // lengthen smaller strings.
 388    function sq_mt_seed($Val)
 389    {
 390        // if mt_getrandmax() does not return a 2^n - 1 number,
 391        // this might not work well.  This uses $Max as a bitmask.
 392        $Max = mt_getrandmax();
 393
 394        if (! is_int($Val))
 395        {
 396            if (function_exists('crc32'))
 397            {
 398                $Val = crc32($Val);
 399            }
 400            else
 401            {
 402                $Str = $Val;
 403                $Pos = 0;
 404                $Val = 0;
 405                $Mask = $Max / 2;
 406                $HighBit = $Max ^ $Mask;
 407                while ($Pos < strlen($Str))
 408                {
 409                    if ($Val & $HighBit)
 410                    {
 411                        $Val = (($Val & $Mask) << 1) + 1;
 412                    }
 413                    else
 414                    {
 415                        $Val = ($Val & $Mask) << 1;
 416                    }
 417                    $Val ^= $Str[$Pos];
 418                    $Pos ++;
 419                }
 420            }
 421        }
 422
 423        if ($Val < 0)
 424          $Val *= -1;
 425        if ($Val = 0)
 426          return;
 427
 428        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 429    }
 430
 431
 432    // This function initializes the random number generator fairly well.
 433    // It also only initializes it once, so you don't accidentally get
 434    // the same 'random' numbers twice in one session.
 435    function sq_mt_randomize()
 436    {
 437       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 438       static $randomized;
 439
 440       if ($randomized)
 441          return;
 442
 443       // Global
 444       sq_mt_seed((int)((double) microtime() * 1000000));
 445       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 446
 447       // getrusage
 448       if (function_exists('getrusage')) {
 449          $dat = getrusage();
 450           $Str = '';
 451           foreach ($dat as $k => $v)
 452           {
 453               $Str .= $k . $v;
 454           }
 455           sq_mt_seed(md5($Str));
 456       }
 457
 458       // Apache-specific
 459       sq_mt_seed(md5($UNIQUE_ID));
 460
 461       $randomized = 1;
 462    }
 463
 464    function OneTimePadCreate ($length=100) {
 465       sq_mt_randomize();
 466
 467       $pad = '';
 468       for ($i = 0; $i < $length; $i++) {
 469           $pad .= chr(mt_rand(0,255));
 470       }
 471
 472       return base64_encode($pad);
 473    }
 474
 475    // Check if we have a required PHP-version. Return TRUE if we do,
 476    // or FALSE if we don't.
 477    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 478    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 479    // Does not handle betas like 4.0.1b1 or development versions
 480    function sqCheckPHPVersion($major, $minor, $release) {
 481
 482       $ver = phpversion();
 483       eregi('^([0-9]+)\\.([0-9]+)(.*)', $ver, $regs);
 484
 485       // Parse the version string
 486       $vmajor  = strval($regs[1]);
 487       $vminor  = strval($regs[2]);
 488       $vrel    = $regs[3];
 489       if($vrel[0] == ".")
 490           $vrel = strval(substr($vrel, 1));
 491       if($vrel[0] == 'b' || $vrel[0] == 'B')
 492           $vrel = - strval(substr($vrel, 1));
 493       if($vrel[0] == 'r' || $vrel[0] == 'R')
 494           $vrel = - strval(substr($vrel, 2))/10;
 495
 496       // Compare major version
 497       if($vmajor < $major) return false;
 498       if($vmajor > $major) return true;
 499
 500       // Major is the same. Compare minor
 501       if($vminor < $minor) return false;
 502       if($vminor > $minor) return true;
 503
 504       // Major and minor is the same as the required one.
 505       // Compare release
 506       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 507           if($vrel < $release) return false;
 508       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 509           return true;
 510       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 511           return false;
 512       } else {                                // Both are beta
 513           if($vrel > $release) return false;
 514       }
 515
 516       return true;
 517    }
 518
 519    /* Returns a string showing the size of the message/attachment */
 520    function show_readable_size($bytes)
 521    {
 522        $bytes /= 1024;
 523        $type = 'k';
 524
 525        if ($bytes / 1024 > 1)
 526        {
 527            $bytes /= 1024;
 528            $type = 'm';
 529        }
 530
 531        if ($bytes < 10)
 532        {
 533            $bytes *= 10;
 534            settype($bytes, 'integer');
 535            $bytes /= 10;
 536        }
 537        else
 538            settype($bytes, 'integer');
 539
 540        return $bytes . '<small>&nbsp;' . $type . '</small>';
 541    }
 542
 543    /* Generates a random string from the caracter set you pass in
 544     *
 545     * Flags:
 546     *   1 = add lowercase a-z to $chars
 547     *   2 = add uppercase A-Z to $chars
 548     *   4 = add numbers 0-9 to $chars
 549     */
 550
 551    function GenerateRandomString($size, $chars, $flags = 0)
 552    {
 553       if ($flags & 0x1)
 554           $chars .= 'abcdefghijklmnopqrstuvwxyz';
 555       if ($flags & 0x2)
 556           $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
 557       if ($flags & 0x4)
 558           $chars .= '0123456789';
 559
 560       if ($size < 1 || strlen($chars) < 1)
 561           return '';
 562
 563       sq_mt_randomize(); // Initialize the random number generator
 564
 565       $String = "";
 566       while (strlen($String) < $size) {
 567          $String .= $chars[mt_rand(0, strlen($chars))];
 568       }
 569
 570       return $String;
 571    }
 572
 573 ?>