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 == "") return $haystack;
  19       if ($needle == ".") $needle = "\.";
  20       ereg("([^$needle]+)$needle?$", $haystack, $regs);
  21       return $regs[1];
  22    }
  23
  24    //*************************************************************************
  25    // Read from the back of $haystack until $needle is found, or the begining
  26    //    of the $haystack is reached.  $needle is a single character
  27    //*************************************************************************
  28    function readMailboxParent($haystack, $needle) {
  29       if ($needle == ".") $needle = "\.";
  30       ereg("^(.+)$needle([^$needle]+)$needle?$", $haystack, $regs);
  31       return $regs[1];
  32    }
  33
  34    // Searches for the next position in a string minus white space
  35    function next_pos_minus_white ($haystack, $pos) {
  36       while (substr($haystack, $pos, 1) == " " ||
  37              substr($haystack, $pos, 1) == "\t" ||
  38              substr($haystack, $pos, 1) == "\n" ||
  39              substr($haystack, $pos, 1) == "\r") {
  40          if ($pos >= strlen($haystack))
  41             return -1;
  42          $pos++;
  43       }
  44       return $pos;
  45    }
  46
  47    // Wraps text at $wrap characters
  48    // Has a problem with special HTML characters, so call this before
  49    // you do character translation.
  50    // Specifically, &#039 comes up as 5 characters instead of 1.
  51    // This should not add newlines to the end of lines.
  52    function sqWordWrap(&$line, $wrap) {
  53       preg_match("/^([\s>]*)([^\s>].*)?$/", $line, $regs);
  54       $beginning_spaces = $regs[1];
  55       $words = explode(" ", $regs[2]);
  56
  57       $i = 0;
  58       $line = $beginning_spaces;
  59
  60       while ($i < count($words)) {
  61          // Force one word to be on a line (minimum)
  62          $line .= $words[$i];
  63          $line_len = strlen($beginning_spaces) + strlen($words[$i]) +
  64              strlen($words[$i + 1]) + 2;
  65          $i ++;
  66
  67          // Add more words (as long as they fit)
  68          while ($line_len < $wrap && $i < count($words)) {
  69             $line .= ' ' . $words[$i];
  70             $i++;
  71             $line_len += strlen($words[$i]) + 1;
  72          }
  73
  74          // Skip spaces if they are the first thing on a continued line
  75          while (!$words[$i] && $i < count($words)) {
  76             $i ++;
  77          }
  78
  79          // Go to the next line if we have more to process
  80          if ($i < count($words)) {
  81             $line .= "\n$beginning_spaces";
  82          }
  83       }
  84    }
  85
  86
  87    // Does the opposite of sqWordWrap()
  88    function sqUnWordWrap(&$body)
  89    {
  90        $lines = explode("\n", $body);
  91        $body = "";
  92        $PreviousSpaces = "";
  93        for ($i = 0; $i < count($lines); $i ++)
  94        {
  95            preg_match("/^([\s>]*)([^\s>].*)?$/", $lines[$i], $regs);
  96            $CurrentSpaces = $regs[1];
  97            $CurrentRest = $regs[2];
  98            if ($i == 0)
  99            {
 100                $PreviousSpaces = $CurrentSpaces;
 101                $body = $lines[$i];
 102            }
 103            else if ($PreviousSpaces == $CurrentSpaces &&  // Do the beginnings match
 104                strlen($lines[$i - 1]) > 65 &&             // Over 65 characters long
 105                strlen($CurrentRest))                      // and there's a line to continue with
 106            {
 107                $body .= ' ' . $CurrentRest;
 108            }
 109            else
 110            {
 111                $body .= "\n" . $lines[$i];
 112                $PreviousSpaces = $CurrentSpaces;
 113            }
 114        }
 115        $body .= "\n";
 116    }
 117
 118
 119    /** Returns an array of email addresses **/
 120    /* Be cautious of "user@host.com" */
 121    function parseAddrs($text) {
 122       if (trim($text) == "")
 123          return;
 124       $text = str_replace(" ", "", $text);
 125       $text = ereg_replace('"[^"]*"', "", $text);
 126       $text = ereg_replace("\([^\)]*\)", "", $text);
 127       $text = str_replace(",", ";", $text);
 128       $array = explode(";", $text);
 129       for ($i = 0; $i < count ($array); $i++) {
 130                             $array[$i] = eregi_replace ("^.*[<]", "", $array[$i]);
 131                             $array[$i] = eregi_replace ("[>].*$", "", $array[$i]);
 132                   }
 133       return $array;
 134    }
 135
 136    /** Returns a line of comma separated email addresses from an array **/
 137    function getLineOfAddrs($array) {
 138       if (is_array($array)) {
 139         $to_line = implode(", ", $array);
 140         $to_line = trim(ereg_replace(",,+", ",", $to_line));
 141       } else {
 142         $to_line = "";
 143       }
 144       return $to_line;
 145    }
 146
 147    function translateText(&$body, $wrap_at, $charset) {
 148       global $where, $what; // from searching
 149                 global $url_parser_php;
 150
 151       if (!isset($url_parser_php)) {
 152          include "../functions/url_parser.php";
 153       }
 154
 155       $body_ary = explode("\n", $body);
 156       $PriorQuotes = 0;
 157       for ($i=0; $i < count($body_ary); $i++) {
 158          $line = $body_ary[$i];
 159          if (strlen($line) - 2 >= $wrap_at) {
 160             sqWordWrap($line, $wrap_at);
 161          }
 162          $line = charset_decode($charset, $line);
 163          $line = str_replace("\t", '        ', $line);
 164
 165          parseUrl ($line);
 166
 167          $Quotes = 0;
 168          $pos = 0;
 169          while (1)
 170          {
 171              if ($line[$pos] == ' ')
 172              {
 173                 $pos ++;
 174              }
 175              else if (strpos($line, '&gt;', $pos) === $pos)
 176              {
 177                 $pos += 4;
 178                 $Quotes ++;
 179              }
 180              else
 181              {
 182                  break;
 183              }
 184          }
 185
 186          if ($Quotes > 1)
 187             $line = "<FONT COLOR=FF0000>$line</FONT>";
 188          elseif ($Quotes)
 189             $line = "<FONT COLOR=800000>$line</FONT>";
 190
 191          $body_ary[$i] = $line;
 192       }
 193       $body = "<pre>" . implode("\n", $body_ary) . "</pre>";
 194    }
 195
 196    /* SquirrelMail version number -- DO NOT CHANGE */
 197    $version = "1.0pre2 (cvs)";
 198
 199
 200    function find_mailbox_name ($mailbox) {
 201 /*
 202       $mailbox = trim($mailbox);
 203       if (substr($mailbox, strlen($mailbox)-1, strlen($mailbox)) == "\"") {
 204          $mailbox = substr($mailbox, 0, strlen($mailbox) - 1);
 205          $pos = strrpos ($mailbox, "\"")+1;
 206          $box = substr($mailbox, $pos);
 207       } else {
 208          $box = substr($mailbox, strrpos($mailbox, " ")+1, strlen($mailbox));
 209       }
 210       return $box;
 211 */
 212
 213       if (ereg(" *\"([^\r\n\"]*)\"[ \r\n]*$", $mailbox, $regs))
 214           return $regs[1];
 215       ereg(" *([^ \r\n\"]*)[ \r\n]*$",$mailbox,$regs);
 216       return $regs[1];
 217
 218    }
 219
 220    function replace_spaces ($string) {
 221       return str_replace(" ", "&nbsp;", $string);
 222    }
 223
 224    function replace_escaped_spaces ($string) {
 225       return str_replace("&nbsp;", " ", $string);
 226    }
 227
 228    function get_location () {
 229       # This determines the location to forward to relative
 230       # to your server.  If this doesnt work correctly for
 231       # you (although it should), you can remove all this
 232       # code except the last two lines, and change the header()
 233       # function to look something like this, customized to
 234       # the location of SquirrelMail on your server:
 235       #
 236       #   http://www.myhost.com/squirrelmail/src/login.php
 237
 238       global $PHP_SELF, $SERVER_NAME, $HTTPS, $HTTP_HOST, $SERVER_PORT;
 239
 240       // Get the path
 241       $path = substr($PHP_SELF, 0, strrpos($PHP_SELF, '/'));
 242
 243       // Check if this is a HTTPS or regular HTTP request
 244       $proto = "http://";
 245       if(isset($HTTPS) && $HTTPS == 'on' ) {
 246         $proto = "https://";
 247       }
 248
 249       // Get the hostname from the Host header or server config.
 250       $host = "";
 251       if (isset($HTTP_HOST) && !empty($HTTP_HOST))
 252       {
 253           $host = $HTTP_HOST;
 254       }
 255       else if (isset($SERVER_NAME) && !empty($SERVER_NAME))
 256       {
 257           $host = $SERVER_NAME;
 258       }
 259
 260       $port = '';
 261       if (! strstr($host, ':'))
 262       {
 263           if (isset($SERVER_PORT)) {
 264               if (($SERVER_PORT != 80 && $proto == "http://")
 265                       || ($SERVER_PORT != 443 && $proto == "https://")) {
 266                   $port = sprintf(':%d', $SERVER_PORT);
 267               }
 268           }
 269       }
 270
 271       if ($host)
 272           return $proto . $host . $port . $path;
 273
 274       // Fallback is to omit the server name and use a relative URI,
 275       // although this is not RFC 2616 compliant.
 276       return $path;
 277    }
 278
 279    function sqStripSlashes($string) {
 280       if (get_magic_quotes_gpc()) {
 281          $string = stripslashes($string);
 282       }
 283       return $string;
 284    }
 285
 286
 287    // These functions are used to encrypt the passowrd before it is
 288    // stored in a cookie.
 289    function OneTimePadEncrypt ($string, $pad) {
 290       for ($i = 0; $i < strlen ($string); $i++) {
 291          $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 292       }
 293
 294       return base64_encode($encrypted);
 295    }
 296
 297    function OneTimePadDecrypt ($string, $pad) {
 298       $encrypted = base64_decode ($string);
 299
 300       for ($i = 0; $i < strlen ($encrypted); $i++) {
 301          $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 302       }
 303
 304       return $decrypted;
 305    }
 306
 307
 308    // Randomize the mt_rand() function.  Toss this in strings or
 309    // integers and it will seed the generator appropriately.
 310    // With strings, it is better to get them long. Use md5() to
 311    // lengthen smaller strings.
 312    function sq_mt_seed($Val)
 313    {
 314        // if mt_getrandmax() does not return a 2^n - 1 number,
 315        // this might not work well.  This uses $Max as a bitmask.
 316        $Max = mt_getrandmax();
 317
 318        if (! is_int($Val))
 319        {
 320            if (function_exists("crc32"))
 321            {
 322                $Val = crc32($Val);
 323            }
 324            else
 325            {
 326                $Str = $Val;
 327                $Pos = 0;
 328                $Val = 0;
 329                $Mask = $Max / 2;
 330                $HighBit = $Max ^ $Mask;
 331                while ($Pos < strlen($Str))
 332                {
 333                    if ($Val & $HighBit)
 334                    {
 335                        $Val = (($Val & $Mask) << 1) + 1;
 336                    }
 337                    else
 338                    {
 339                        $Val = ($Val & $Mask) << 1;
 340                    }
 341                    $Val ^= $Str[$Pos];
 342                    $Pos ++;
 343                }
 344            }
 345        }
 346
 347        if ($Val < 0)
 348          $Val *= -1;
 349        if ($Val = 0)
 350          return;
 351
 352        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 353    }
 354
 355
 356    // This function initializes the random number generator fairly well.
 357    // It also only initializes it once, so you don't accidentally get
 358    // the same 'random' numbers twice in one session.
 359    function sq_mt_randomize()
 360    {
 361       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 362       static $randomized;
 363
 364       if ($randomized)
 365          return;
 366
 367       // Global
 368       sq_mt_seed((int)((double) microtime() * 1000000));
 369       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 370
 371       // getrusage
 372       if (function_exists("getrusage")) {
 373          $dat = getrusage();
 374          sq_mt_seed(md5($dat["ru_nswap"] . $dat["ru_majflt"] .
 375             $dat["ru_utime.tv_sec"] . $dat["ru_utime.tv_usec"]));
 376       }
 377
 378       // Apache-specific
 379       sq_mt_seed(md5($UNIQUE_ID));
 380
 381       $randomized = 1;
 382    }
 383
 384    function OneTimePadCreate ($length=100) {
 385       sq_mt_randomize();
 386
 387       for ($i = 0; $i < $length; $i++) {
 388          $pad .= chr(mt_rand(0,255));
 389       }
 390
 391       return $pad;
 392    }
 393
 394    // Check if we have a required PHP-version. Return TRUE if we do,
 395    // or FALSE if we don't.
 396    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 397    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 398    // Does not handle betas like 4.0.1b1 or development versions
 399    function sqCheckPHPVersion($major, $minor, $release) {
 400
 401       $ver = phpversion();
 402       eregi("^([0-9]+)\.([0-9]+)(.*)", $ver, $regs);
 403
 404       // Parse the version string
 405       $vmajor  = strval($regs[1]);
 406       $vminor  = strval($regs[2]);
 407       $vrel    = $regs[3];
 408       if($vrel[0] == ".")
 409          $vrel = strval(substr($vrel, 1));
 410       if($vrel[0] == "b" || $vrel[0] == "B")
 411          $vrel = - strval(substr($vrel, 1));
 412       if($vrel[0] == "r" || $vrel[0] == "R")
 413          $vrel = - strval(substr($vrel, 2))/10;
 414
 415       // Compare major version
 416       if($vmajor < $major) return false;
 417       if($vmajor > $major) return true;
 418
 419       // Major is the same. Compare minor
 420       if($vminor < $minor) return false;
 421       if($vminor > $minor) return true;
 422
 423       // Major and minor is the same as the required one.
 424       // Compare release
 425       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 426          if($vrel < $release) return false;
 427       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 428          return true;
 429       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 430          return false;
 431       } else {                                // Both are beta
 432          if($vrel > $release) return false;
 433       }
 434
 435       return true;
 436    }
 437
 438    /* Returns a string showing the size of the message/attachment */
 439    function show_readable_size($bytes)
 440    {
 441        $bytes /= 1024;
 442        $type = 'k';
 443
 444        if ($bytes / 1024 > 1)
 445        {
 446            $bytes /= 1024;
 447            $type = 'm';
 448        }
 449
 450        if ($bytes < 10)
 451        {
 452            $bytes *= 10;
 453            settype($bytes, "integer");
 454            $bytes /= 10;
 455        }
 456        else
 457            settype($bytes, "integer");
 458
 459        return $bytes . '<small>&nbsp;' . $type . '</small>';
 460    }
 461
 462    /* Generates a random string from the caracter set you pass in
 463     *
 464     * Flags:
 465     *   1 = add lowercase a-z to $chars
 466     *   2 = add uppercase A-Z to $chars
 467     *   4 = add numbers 0-9 to $chars
 468     */
 469
 470    function GenerateRandomString($size, $chars, $flags = 0)
 471    {
 472       if ($flags & 0x1)
 473           $chars .= 'abcdefghijklmnopqrstuvwxyz';
 474       if ($flags & 0x2)
 475           $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
 476       if ($flags & 0x4)
 477           $chars .= '0123456789';
 478
 479       if ($size < 1 || strlen($chars) < 1)
 480           return "";
 481
 482       sq_mt_randomize(); // Initialize the random number generator
 483
 484       while (strlen($String) < $size) {
 485          $String .= $chars[mt_rand(0, strlen($chars))];
 486       }
 487
 488       return $String;
 489    }
 490
 491 ?>