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