functions/strings.php

   1 <?php
   2
   3    /* $Id$ */
   4
   5    $strings_php = true;
   6
   7    //*************************************************************************
   8    // Count the number of occurances of $needle are in $haystack.
   9    // $needle can be a character or string, and need not occur in $haystack
  10    //*************************************************************************
  11    function countCharInString($haystack, $needle) {
  12       if ($needle == '') return 0;
  13       return count(explode($needle, $haystack));
  14    }
  15
  16    //*************************************************************************
  17    // Read from the back of $haystack until $needle is found, or the begining
  18    //    of the $haystack is reached.  $needle is a single character
  19    //*************************************************************************
  20    function readShortMailboxName($haystack, $needle) {
  21       if ($needle == '') return $haystack;
  22       $parts = explode($needle, $haystack);
  23       $elem = array_pop($parts);
  24       while ($elem == '' && count($parts))
  25       {
  26           $elem = array_pop($parts);
  27       }
  28       return $elem;
  29    }
  30
  31    //*************************************************************************
  32    // Read from the back of $haystack until $needle is found, or the begining
  33    //    of the $haystack is reached.  $needle is a single character
  34    //*************************************************************************
  35    function readMailboxParent($haystack, $needle) {
  36       if ($needle == '') return '';
  37       $parts = explode($needle, $haystack);
  38       $elem = array_pop($parts);
  39       while ($elem == '' && count($parts))
  40       {
  41           $elem = array_pop($parts);
  42       }
  43       return join($needle, $parts);
  44    }
  45
  46    // Searches for the next position in a string minus white space
  47    function next_pos_minus_white ($haystack, $pos) {
  48       while (substr($haystack, $pos, 1) == ' ' ||
  49              substr($haystack, $pos, 1) == "\t" ||
  50              substr($haystack, $pos, 1) == "\n" ||
  51              substr($haystack, $pos, 1) == "\r") {
  52          if ($pos >= strlen($haystack))
  53             return -1;
  54          $pos++;
  55       }
  56       return $pos;
  57    }
  58
  59    // Wraps text at $wrap characters
  60    // Has a problem with special HTML characters, so call this before
  61    // you do character translation.
  62    // Specifically, &#039 comes up as 5 characters instead of 1.
  63    // This should not add newlines to the end of lines.
  64    function sqWordWrap(&$line, $wrap) {
  65       preg_match('/^([\\s>]*)([^\\s>].*)?$/', $line, $regs);
  66       $beginning_spaces = $regs[1];
  67           if (isset($regs[2])) {
  68          $words = explode(' ', $regs[2]);
  69       } else {
  70          $words = "";
  71           }
  72
  73       $i = 0;
  74       $line = $beginning_spaces;
  75
  76       while ($i < count($words)) {
  77          // Force one word to be on a line (minimum)
  78          $line .= $words[$i];
  79          $line_len = strlen($beginning_spaces) + strlen($words[$i]) + 2;
  80          if (isset($words[$i + 1]))
  81              $line_len += strlen($words[$i + 1]);
  82          $i ++;
  83
  84          // Add more words (as long as they fit)
  85          while ($line_len < $wrap && $i < count($words)) {
  86             $line .= ' ' . $words[$i];
  87             $i++;
  88             if (isset($words[$i]))
  89                 $line_len += strlen($words[$i]) + 1;
  90             else
  91                 $line_len += 1;
  92          }
  93
  94          // Skip spaces if they are the first thing on a continued line
  95          while (!isset($words[$i]) && $i < count($words)) {
  96             $i ++;
  97          }
  98
  99          // Go to the next line if we have more to process
 100          if ($i < count($words)) {
 101             $line .= "\n" . $beginning_spaces;
 102          }
 103       }
 104    }
 105
 106
 107    // Does the opposite of sqWordWrap()
 108    function sqUnWordWrap(&$body)
 109    {
 110        $lines = explode("\n", $body);
 111        $body = "";
 112        $PreviousSpaces = "";
 113        for ($i = 0; $i < count($lines); $i ++)
 114        {
 115            preg_match('/^([\\s>]*)([^\\s>].*)?$/', $lines[$i], $regs);
 116            $CurrentSpaces = $regs[1];
 117            if (isset($regs[2]))
 118                $CurrentRest = $regs[2];
 119            if ($i == 0)
 120            {
 121                $PreviousSpaces = $CurrentSpaces;
 122                $body = $lines[$i];
 123            }
 124            else if ($PreviousSpaces == $CurrentSpaces &&  // Do the beginnings match
 125                strlen($lines[$i - 1]) > 65 &&             // Over 65 characters long
 126                strlen($CurrentRest))                      // and there's a line to continue with
 127            {
 128                $body .= ' ' . $CurrentRest;
 129            }
 130            else
 131            {
 132                $body .= "\n" . $lines[$i];
 133                $PreviousSpaces = $CurrentSpaces;
 134            }
 135        }
 136        $body .= "\n";
 137    }
 138
 139
 140    /** Returns an array of email addresses **/
 141    /* Be cautious of "user@host.com" */
 142    function parseAddrs($text) {
 143       if (trim($text) == "")
 144          return array();
 145       $text = str_replace(' ', '', $text);
 146       $text = ereg_replace('"[^"]*"', '', $text);
 147       $text = ereg_replace('\\([^\\)]*\\)', '', $text);
 148       $text = str_replace(',', ';', $text);
 149       $array = explode(';', $text);
 150       for ($i = 0; $i < count ($array); $i++) {
 151                             $array[$i] = eregi_replace ("^.*[<]", '', $array[$i]);
 152                             $array[$i] = eregi_replace ("[>].*$", '', $array[$i]);
 153                   }
 154       return $array;
 155    }
 156
 157    /** Returns a line of comma separated email addresses from an array **/
 158    function getLineOfAddrs($array) {
 159       if (is_array($array)) {
 160         $to_line = implode(', ', $array);
 161         $to_line = trim(ereg_replace(',,+', ',', $to_line));
 162       } else {
 163         $to_line = '';
 164       }
 165       return $to_line;
 166    }
 167
 168    function translateText(&$body, $wrap_at, $charset) {
 169       global $where, $what; // from searching
 170                 global $url_parser_php;
 171
 172       if (!isset($url_parser_php)) {
 173          include '../functions/url_parser.php';
 174       }
 175
 176       $body_ary = explode("\n", $body);
 177       $PriorQuotes = 0;
 178       for ($i=0; $i < count($body_ary); $i++) {
 179          $line = $body_ary[$i];
 180          if (strlen($line) - 2 >= $wrap_at) {
 181             sqWordWrap($line, $wrap_at);
 182          }
 183          $line = charset_decode($charset, $line);
 184          $line = str_replace("\t", '        ', $line);
 185
 186          parseUrl ($line);
 187
 188          $Quotes = 0;
 189          $pos = 0;
 190          while (1)
 191          {
 192              if ($line[$pos] == ' ')
 193              {
 194                 $pos ++;
 195              }
 196              else if (strpos($line, '&gt;', $pos) === $pos)
 197              {
 198                 $pos += 4;
 199                 $Quotes ++;
 200              }
 201              else
 202              {
 203                  break;
 204              }
 205          }
 206
 207          if ($Quotes > 1)
 208             $line = '<FONT COLOR="FF0000">'.$line.'</FONT>';
 209          elseif ($Quotes)
 210             $line = '<FONT COLOR="800000">'.$line.'</FONT>';
 211
 212          $body_ary[$i] = $line;
 213       }
 214       $body = '<pre>' . implode("\n", $body_ary) . '</pre>';
 215    }
 216
 217    /* SquirrelMail version number -- DO NOT CHANGE */
 218    $version = '1.0.1 [cvs]';
 219
 220
 221    function find_mailbox_name ($mailbox) {
 222       if (ereg(" *\"([^\r\n\"]*)\"[ \r\n]*$", $mailbox, $regs))
 223           return $regs[1];
 224       ereg(" *([^ \r\n\"]*)[ \r\n]*$",$mailbox,$regs);
 225       return $regs[1];
 226
 227    }
 228
 229    function replace_spaces ($string) {
 230       return str_replace(' ', '&nbsp;', $string);
 231    }
 232
 233    function replace_escaped_spaces ($string) {
 234       return str_replace('&nbsp;', ' ', $string);
 235    }
 236
 237    function get_location () {
 238       # This determines the location to forward to relative
 239       # to your server.  If this doesnt work correctly for
 240       # you (although it should), you can remove all this
 241       # code except the last two lines, and change the header()
 242       # function to look something like this, customized to
 243       # the location of SquirrelMail on your server:
 244       #
 245       #   http://www.myhost.com/squirrelmail/src/login.php
 246
 247       global $PHP_SELF, $SERVER_NAME, $HTTPS, $HTTP_HOST, $SERVER_PORT;
 248
 249       // Get the path
 250       $path = substr($PHP_SELF, 0, strrpos($PHP_SELF, '/'));
 251
 252       // Check if this is a HTTPS or regular HTTP request
 253       $proto = 'http://';
 254       if(isset($HTTPS) && !strcasecmp($HTTPS, 'on') ) {
 255         $proto = 'https://';
 256       }
 257
 258       // Get the hostname from the Host header or server config.
 259       $host = '';
 260       if (isset($HTTP_HOST) && !empty($HTTP_HOST))
 261       {
 262           $host = $HTTP_HOST;
 263       }
 264       else if (isset($SERVER_NAME) && !empty($SERVER_NAME))
 265       {
 266           $host = $SERVER_NAME;
 267       }
 268
 269       $port = '';
 270       if (! strstr($host, ':'))
 271       {
 272           if (isset($SERVER_PORT)) {
 273               if (($SERVER_PORT != 80 && $proto == 'http://')
 274                       || ($SERVER_PORT != 443 && $proto == 'https://')) {
 275                   $port = sprintf(':%d', $SERVER_PORT);
 276               }
 277           }
 278       }
 279
 280       if ($host)
 281           return $proto . $host . $port . $path;
 282
 283       // Fallback is to omit the server name and use a relative URI,
 284       // although this is not RFC 2616 compliant.
 285       return $path;
 286    }
 287
 288    function sqStripSlashes($string) {
 289       if (get_magic_quotes_gpc()) {
 290          $string = stripslashes($string);
 291       }
 292       return $string;
 293    }
 294
 295
 296    // These functions are used to encrypt the passowrd before it is
 297    // stored in a cookie.
 298    function OneTimePadEncrypt ($string, $epad) {
 299       $pad = base64_decode($epad);
 300       $encrypted = '';
 301       for ($i = 0; $i < strlen ($string); $i++) {
 302          $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 303       }
 304
 305       return base64_encode($encrypted);
 306    }
 307
 308    function OneTimePadDecrypt ($string, $epad) {
 309       $pad = base64_decode($epad);
 310       $encrypted = base64_decode ($string);
 311       $decrypted = '';
 312       for ($i = 0; $i < strlen ($encrypted); $i++) {
 313          $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 314       }
 315
 316       return $decrypted;
 317    }
 318
 319
 320    // Randomize the mt_rand() function.  Toss this in strings or
 321    // integers and it will seed the generator appropriately.
 322    // With strings, it is better to get them long. Use md5() to
 323    // lengthen smaller strings.
 324    function sq_mt_seed($Val)
 325    {
 326        // if mt_getrandmax() does not return a 2^n - 1 number,
 327        // this might not work well.  This uses $Max as a bitmask.
 328        $Max = mt_getrandmax();
 329
 330        if (! is_int($Val))
 331        {
 332            if (function_exists('crc32'))
 333            {
 334                $Val = crc32($Val);
 335            }
 336            else
 337            {
 338                $Str = $Val;
 339                $Pos = 0;
 340                $Val = 0;
 341                $Mask = $Max / 2;
 342                $HighBit = $Max ^ $Mask;
 343                while ($Pos < strlen($Str))
 344                {
 345                    if ($Val & $HighBit)
 346                    {
 347                        $Val = (($Val & $Mask) << 1) + 1;
 348                    }
 349                    else
 350                    {
 351                        $Val = ($Val & $Mask) << 1;
 352                    }
 353                    $Val ^= $Str[$Pos];
 354                    $Pos ++;
 355                }
 356            }
 357        }
 358
 359        if ($Val < 0)
 360          $Val *= -1;
 361        if ($Val = 0)
 362          return;
 363
 364        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 365    }
 366
 367
 368    // This function initializes the random number generator fairly well.
 369    // It also only initializes it once, so you don't accidentally get
 370    // the same 'random' numbers twice in one session.
 371    function sq_mt_randomize()
 372    {
 373       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 374       static $randomized;
 375
 376       if ($randomized)
 377          return;
 378
 379       // Global
 380       sq_mt_seed((int)((double) microtime() * 1000000));
 381       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 382
 383       // getrusage
 384       if (function_exists('getrusage')) {
 385          $dat = getrusage();
 386          $Str = '';
 387          foreach ($dat as $k => $v)
 388          {
 389              $Str .= $k . $v;
 390          }
 391          sq_mt_seed(md5($Str));
 392       }
 393
 394       // Apache-specific
 395       sq_mt_seed(md5($UNIQUE_ID));
 396
 397       $randomized = 1;
 398    }
 399
 400    function OneTimePadCreate ($length=100) {
 401       sq_mt_randomize();
 402
 403       $pad = '';
 404       for ($i = 0; $i < $length; $i++) {
 405          $pad .= chr(mt_rand(0,255));
 406       }
 407
 408       return base64_encode($pad);
 409    }
 410
 411    // Check if we have a required PHP-version. Return TRUE if we do,
 412    // or FALSE if we don't.
 413    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 414    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 415    // Does not handle betas like 4.0.1b1 or development versions
 416    function sqCheckPHPVersion($major, $minor, $release) {
 417
 418       $ver = phpversion();
 419       eregi('^([0-9]+)\\.([0-9]+)(.*)', $ver, $regs);
 420
 421       // Parse the version string
 422       $vmajor  = strval($regs[1]);
 423       $vminor  = strval($regs[2]);
 424       $vrel    = $regs[3];
 425       if($vrel[0] == ".")
 426          $vrel = strval(substr($vrel, 1));
 427       if($vrel[0] == 'b' || $vrel[0] == 'B')
 428          $vrel = - strval(substr($vrel, 1));
 429       if($vrel[0] == 'r' || $vrel[0] == 'R')
 430          $vrel = - strval(substr($vrel, 2))/10;
 431
 432       // Compare major version
 433       if($vmajor < $major) return false;
 434       if($vmajor > $major) return true;
 435
 436       // Major is the same. Compare minor
 437       if($vminor < $minor) return false;
 438       if($vminor > $minor) return true;
 439
 440       // Major and minor is the same as the required one.
 441       // Compare release
 442       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 443          if($vrel < $release) return false;
 444       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 445          return true;
 446       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 447          return false;
 448       } else {                                // Both are beta
 449          if($vrel > $release) return false;
 450       }
 451
 452       return true;
 453    }
 454
 455    /* Returns a string showing the size of the message/attachment */
 456    function show_readable_size($bytes)
 457    {
 458        $bytes /= 1024;
 459        $type = 'k';
 460
 461        if ($bytes / 1024 > 1)
 462        {
 463            $bytes /= 1024;
 464            $type = 'm';
 465        }
 466
 467        if ($bytes < 10)
 468        {
 469            $bytes *= 10;
 470            settype($bytes, 'integer');
 471            $bytes /= 10;
 472        }
 473        else
 474            settype($bytes, 'integer');
 475
 476        return $bytes . '<small>&nbsp;' . $type . '</small>';
 477    }
 478
 479    /* Generates a random string from the caracter set you pass in
 480     *
 481     * Flags:
 482     *   1 = add lowercase a-z to $chars
 483     *   2 = add uppercase A-Z to $chars
 484     *   4 = add numbers 0-9 to $chars
 485     */
 486
 487    function GenerateRandomString($size, $chars, $flags = 0)
 488    {
 489       if ($flags & 0x1)
 490           $chars .= 'abcdefghijklmnopqrstuvwxyz';
 491       if ($flags & 0x2)
 492           $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
 493       if ($flags & 0x4)
 494           $chars .= '0123456789';
 495
 496       if ($size < 1 || strlen($chars) < 1)
 497           return '';
 498
 499       sq_mt_randomize(); // Initialize the random number generator
 500
 501           $String = "";
 502       while (strlen($String) < $size) {
 503          $String .= $chars[mt_rand(0, strlen($chars))];
 504       }
 505
 506       return $String;
 507    }
 508
 509 ?>