functions/strings.php

   1 <?php
   2
   3    $strings_php = true;
   4
   5    //*************************************************************************
   6    // Count the number of occurances of $needle are in $haystack.
   7    //*************************************************************************
   8    function countCharInString($haystack, $needle) {
   9       $haystack = ereg_replace("[^$needle]","",$haystack);
  10       return strlen($haystack);
  11    }
  12
  13    //*************************************************************************
  14    // Read from the back of $haystack until $needle is found, or the begining
  15    //    of the $haystack is reached.  $needle is a single character
  16    //*************************************************************************
  17    function readShortMailboxName($haystack, $needle) {
  18       if ($needle == ".") $needle = "\.";
  19       ereg("([^$needle]+)$needle?$", $haystack, $regs);
  20       return $regs[1];
  21    }
  22
  23    // Searches for the next position in a string minus white space
  24    function next_pos_minus_white ($haystack, $pos) {
  25       while (substr($haystack, $pos, 1) == " " ||
  26              substr($haystack, $pos, 1) == "\t" ||
  27              substr($haystack, $pos, 1) == "\n" ||
  28              substr($haystack, $pos, 1) == "\r") {
  29          if ($pos >= strlen($haystack))
  30             return -1;
  31          $pos++;
  32       }
  33       return $pos;
  34    }
  35
  36    // Wraps text at $wrap characters
  37    // Has a problem with special HTML characters, so call this before
  38    // you do character translation.
  39    // Specifically, &#039 comes up as 5 characters instead of 1.
  40    // This should not add newlines to the end of lines.
  41    function sqWordWrap(&$line, $wrap) {
  42       preg_match("/^([\s>]*)([^\s>].*)?$/", $line, $regs);
  43       $beginning_spaces = $regs[1];
  44       $words = explode(" ", $regs[2]);
  45
  46       $i = 0;
  47       $line = $beginning_spaces;
  48
  49       while ($i < count($words)) {
  50          // Force one word to be on a line (minimum)
  51          $line .= $words[$i];
  52          $line_len = strlen($beginning_spaces) + strlen($words[$i]) +
  53              strlen($words[$i + 1]) + 2;
  54          $i ++;
  55
  56          // Add more words (as long as they fit)
  57          while ($line_len < $wrap && $i < count($words)) {
  58             $line .= ' ' . $words[$i];
  59             $i++;
  60             $line_len += strlen($words[$i]) + 1;
  61          }
  62
  63          // Skip spaces if they are the first thing on a continued line
  64          while (!$words[$i] && $i < count($words)) {
  65             $i ++;
  66          }
  67
  68          // Go to the next line if we have more to process
  69          if ($i < count($words)) {
  70             $line .= "\n$beginning_spaces";
  71          }
  72       }
  73    }
  74
  75
  76    // Does the opposite of sqWordWrap()
  77    function sqUnWordWrap(&$body)
  78    {
  79        $lines = explode("\n", $body);
  80        $body = "";
  81        $PreviousSpaces = "";
  82        for ($i = 0; $i < count($lines); $i ++)
  83        {
  84            preg_match("/^([\s>]*)([^\s>].*)?$/", $lines[$i], $regs);
  85            $CurrentSpaces = $regs[1];
  86            $CurrentRest = $regs[2];
  87            if ($i == 0)
  88            {
  89                $PreviousSpaces = $CurrentSpaces;
  90                $body = $lines[$i];
  91            }
  92            else if ($PreviousSpaces == $CurrentSpaces &&  // Do the beginnings match
  93                strlen($lines[$i - 1]) > 65 &&             // Over 65 characters long
  94                strlen($CurrentRest))                      // and there's a line to continue with
  95            {
  96                $body .= ' ' . $CurrentRest;
  97            }
  98            else
  99            {
 100                $body .= "\n" . $lines[$i];
 101                $PreviousSpaces = $CurrentSpaces;
 102            }
 103        }
 104        $body .= "\n";
 105    }
 106
 107
 108    /** Returns an array of email addresses **/
 109    /* Be cautious of "user@host.com" */
 110    function parseAddrs($text) {
 111       if (trim($text) == "")
 112          return;
 113       $text = str_replace(" ", "", $text);
 114       $text = ereg_replace('"[^"]*"', "", $text);
 115       $text = ereg_replace("\([^\)]*\)", "", $text);
 116       $text = str_replace(",", ";", $text);
 117       $array = explode(";", $text);
 118       for ($i = 0; $i < count ($array); $i++) {
 119                             $array[$i] = eregi_replace ("^.*[<]", "", $array[$i]);
 120                             $array[$i] = eregi_replace ("[>].*$", "", $array[$i]);
 121                   }
 122       return $array;
 123    }
 124
 125    /** Returns a line of comma separated email addresses from an array **/
 126    function getLineOfAddrs($array) {
 127       if (is_array($array)) {
 128         $to_line = implode(", ", $array);
 129         $to_line = trim(ereg_replace(",,+", ",", $to_line));
 130       } else {
 131         $to_line = "";
 132       }
 133       return $to_line;
 134    }
 135
 136    function translateText(&$body, $wrap_at, $charset) {
 137       global $where, $what; // from searching
 138
 139       if (!isset($url_parser_php)) {
 140          include "../functions/url_parser.php";
 141       }
 142
 143       $body_ary = explode("\n", $body);
 144       $PriorQuotes = 0;
 145       for ($i=0; $i < count($body_ary); $i++) {
 146          $line = $body_ary[$i];
 147          if (strlen($line) - 2 >= $wrap_at) {
 148             sqWordWrap($line, $wrap_at);
 149          }
 150          $line = charset_decode($charset, $line);
 151          $line = str_replace("\t", '        ', $line);
 152
 153          parseUrl ($line);
 154
 155          $Quotes = 0;
 156          $pos = 0;
 157          while (1)
 158          {
 159              if ($line[$pos] == ' ')
 160              {
 161                 $pos ++;
 162              }
 163              else if (strpos($line, '&gt;', $pos) === $pos)
 164              {
 165                 $pos += 4;
 166                 $Quotes ++;
 167              }
 168              else
 169              {
 170                  break;
 171              }
 172          }
 173
 174          if ($Quotes > 1)
 175             $line = "<FONT COLOR=FF0000>$line</FONT>";
 176          elseif ($Quotes)
 177             $line = "<FONT COLOR=800000>$line</FONT>";
 178
 179          $body_ary[$i] = $line;
 180       }
 181       $body = "<pre>" . implode("\n", $body_ary) . "</pre>";
 182    }
 183
 184    /* SquirrelMail version number -- DO NOT CHANGE */
 185    $version = "1.0pre1 (cvs)";
 186
 187
 188    function find_mailbox_name ($mailbox) {
 189 /*
 190       $mailbox = trim($mailbox);
 191       if (substr($mailbox, strlen($mailbox)-1, strlen($mailbox)) == "\"") {
 192          $mailbox = substr($mailbox, 0, strlen($mailbox) - 1);
 193          $pos = strrpos ($mailbox, "\"")+1;
 194          $box = substr($mailbox, $pos);
 195       } else {
 196          $box = substr($mailbox, strrpos($mailbox, " ")+1, strlen($mailbox));
 197       }
 198       return $box;
 199 */
 200
 201       if (ereg(" *\"([^\r\n\"]*)\"[ \r\n]*$", $mailbox, $regs))
 202           return $regs[1];
 203       ereg(" *([^ \r\n\"]*)[ \r\n]*$",$mailbox,$regs);
 204       return $regs[1];
 205
 206    }
 207
 208    function replace_spaces ($string) {
 209       return str_replace(" ", "&nbsp;", $string);
 210    }
 211
 212    function replace_escaped_spaces ($string) {
 213       return str_replace("&nbsp;", " ", $string);
 214    }
 215
 216    function get_location () {
 217       # This determines the location to forward to relative
 218       # to your server.  If this doesnt work correctly for
 219       # you (although it should), you can remove all this
 220       # code except the last two lines, and change the header()
 221       # function to look something like this, customized to
 222       # the location of SquirrelMail on your server:
 223       #
 224       #   http://www.myhost.com/squirrelmail/src/login.php
 225
 226       global $PHP_SELF, $SERVER_NAME, $HTTPS, $HTTP_HOST, $SERVER_PORT;
 227
 228       // Get the path
 229       $path = substr($PHP_SELF, 0, strrpos($PHP_SELF, '/'));
 230
 231       // Check if this is a HTTPS or regular HTTP request
 232       $proto = "http://";
 233       if(isset($HTTPS) && $HTTPS == 'on' ) {
 234         $proto = "https://";
 235       }
 236
 237       // Get the hostname from the Host header or server config.
 238       $host = "";
 239       if (isset($HTTP_HOST) && !empty($HTTP_HOST))
 240       {
 241           $host = $HTTP_HOST;
 242       }
 243       else if (isset($SERVER_NAME) && !empty($SERVER_NAME))
 244       {
 245           $host = $SERVER_NAME;
 246       }
 247
 248       $port = '';
 249       if (! strstr($host, ':'))
 250       {
 251           if (isset($SERVER_PORT)) {
 252               if (($SERVER_PORT != 80 && $proto == "http://")
 253                       || ($SERVER_PORT != 443 && $proto == "https://")) {
 254                   $port = sprintf(':%d', $SERVER_PORT);
 255               }
 256           }
 257       }
 258
 259       if ($host)
 260           return $proto . $host . $port . $path;
 261
 262       // Fallback is to omit the server name and use a relative URI,
 263       // although this is not RFC 2616 compliant.
 264       return $path;
 265    }
 266
 267    function sqStripSlashes($string) {
 268       if (get_magic_quotes_gpc()) {
 269          $string = stripslashes($string);
 270       }
 271       return $string;
 272    }
 273
 274
 275    // These functions are used to encrypt the passowrd before it is
 276    // stored in a cookie.
 277    function OneTimePadEncrypt ($string, $pad) {
 278       for ($i = 0; $i < strlen ($string); $i++) {
 279          $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 280       }
 281
 282       return base64_encode($encrypted);
 283    }
 284
 285    function OneTimePadDecrypt ($string, $pad) {
 286       $encrypted = base64_decode ($string);
 287
 288       for ($i = 0; $i < strlen ($encrypted); $i++) {
 289          $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 290       }
 291
 292       return $decrypted;
 293    }
 294
 295
 296    // Randomize the mt_rand() function.  Toss this in strings or
 297    // integers and it will seed the generator appropriately.
 298    // With strings, it is better to get them long. Use md5() to
 299    // lengthen smaller strings.
 300    function sq_mt_seed($Val)
 301    {
 302        // if mt_getrandmax() does not return a 2^n - 1 number,
 303        // this might not work well.  This uses $Max as a bitmask.
 304        $Max = mt_getrandmax();
 305
 306        if (! is_int($Val))
 307        {
 308            if (function_exists("crc32"))
 309            {
 310                $Val = crc32($Val);
 311            }
 312            else
 313            {
 314                $Str = $Val;
 315                $Pos = 0;
 316                $Val = 0;
 317                $Mask = $Max / 2;
 318                $HighBit = $Max ^ $Mask;
 319                while ($Pos < strlen($Str))
 320                {
 321                    if ($Val & $HighBit)
 322                    {
 323                        $Val = (($Val & $Mask) << 1) + 1;
 324                    }
 325                    else
 326                    {
 327                        $Val = ($Val & $Mask) << 1;
 328                    }
 329                    $Val ^= $Str[$Pos];
 330                    $Pos ++;
 331                }
 332            }
 333        }
 334
 335        if ($Val < 0)
 336          $Val *= -1;
 337        if ($Val = 0)
 338          return;
 339
 340        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 341    }
 342
 343
 344    // This function initializes the random number generator fairly well.
 345    // It also only initializes it once, so you don't accidentally get
 346    // the same 'random' numbers twice in one session.
 347    function sq_mt_randomize()
 348    {
 349       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 350       static $randomized;
 351
 352       if ($randomized)
 353          return;
 354
 355       // Global
 356       sq_mt_seed((int)((double) microtime() * 1000000));
 357       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 358
 359       // getrusage
 360       if (function_exists("getrusage")) {
 361          $dat = getrusage();
 362          sq_mt_seed(md5($dat["ru_nswap"] . $dat["ru_majflt"] .
 363             $dat["ru_utime.tv_sec"] . $dat["ru_utime.tv_usec"]));
 364       }
 365
 366       // Apache-specific
 367       sq_mt_seed(md5($UNIQUE_ID));
 368
 369       $randomized = 1;
 370    }
 371
 372    function OneTimePadCreate ($length=100) {
 373       sq_mt_randomize();
 374
 375       for ($i = 0; $i < $length; $i++) {
 376          $pad .= chr(mt_rand(0,255));
 377       }
 378
 379       return $pad;
 380    }
 381
 382    // Check if we have a required PHP-version. Return TRUE if we do,
 383    // or FALSE if we don't.
 384    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 385    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 386    // Does not handle betas like 4.0.1b1 or development versions
 387    function sqCheckPHPVersion($major, $minor, $release) {
 388
 389       $ver = phpversion();
 390       eregi("^([0-9]+)\.([0-9]+)(.*)", $ver, $regs);
 391
 392       // Parse the version string
 393       $vmajor  = strval($regs[1]);
 394       $vminor  = strval($regs[2]);
 395       $vrel    = $regs[3];
 396       if($vrel[0] == ".")
 397          $vrel = strval(substr($vrel, 1));
 398       if($vrel[0] == "b" || $vrel[0] == "B")
 399          $vrel = - strval(substr($vrel, 1));
 400       if($vrel[0] == "r" || $vrel[0] == "R")
 401          $vrel = - strval(substr($vrel, 2))/10;
 402
 403       // Compare major version
 404       if($vmajor < $major) return false;
 405       if($vmajor > $major) return true;
 406
 407       // Major is the same. Compare minor
 408       if($vminor < $minor) return false;
 409       if($vminor > $minor) return true;
 410
 411       // Major and minor is the same as the required one.
 412       // Compare release
 413       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 414          if($vrel < $release) return false;
 415       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 416          return true;
 417       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 418          return false;
 419       } else {                                // Both are beta
 420          if($vrel > $release) return false;
 421       }
 422
 423       return true;
 424    }
 425
 426    /* Returns a string showing the size of the message/attachment */
 427    function show_readable_size($bytes)
 428    {
 429        $bytes /= 1024;
 430        $type = 'k';
 431
 432        if ($bytes / 1024 > 1)
 433        {
 434            $bytes /= 1024;
 435            $type = 'm';
 436        }
 437
 438        if ($bytes < 10)
 439        {
 440            $bytes *= 10;
 441            settype($bytes, "integer");
 442            $bytes /= 10;
 443        }
 444        else
 445            settype($bytes, "integer");
 446
 447        return $bytes . '<small>&nbsp;' . $type . '</small>';
 448    }
 449
 450    /* Generates a random string from the caracter set you pass in
 451     *
 452     * Flags:
 453     *   1 = add lowercase a-z to $chars
 454     *   2 = add uppercase A-Z to $chars
 455     *   4 = add numbers 0-9 to $chars
 456     */
 457
 458    function GenerateRandomString($size, $chars, $flags = 0)
 459    {
 460       if ($flags & 0x1)
 461           $chars .= 'abcdefghijklmnopqrstuvwxyz';
 462       if ($flags & 0x2)
 463           $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
 464       if ($flags & 0x4)
 465           $chars .= '0123456789';
 466
 467       if ($size < 1 || strlen($chars) < 1)
 468           return "";
 469
 470       sq_mt_randomize(); // Initialize the random number generator
 471
 472       while (strlen($String) < $size) {
 473          $String .= $chars[mt_rand(0, strlen($chars))];
 474       }
 475
 476       return $String;
 477    }
 478
 479 ?>