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       $len = strlen($haystack);
  10       for ($i = 0; $i < $len; $i++) {
  11          if ($haystack[$i] == $needle)
  12             $count++;
  13       }
  14       return $count;
  15    }
  16
  17    //*************************************************************************
  18    // Read from the back of $haystack until $needle is found, or the begining
  19    //    of the $haystack is reached.
  20    //*************************************************************************
  21    function readShortMailboxName($haystack, $needle) {
  22       if (substr($haystack, -1) == $needle)
  23          $haystack = substr($haystack, 0, strlen($haystack) - 1);
  24
  25       if (strrpos($haystack, $needle)) {
  26          $pos = strrpos($haystack, $needle) + 1;
  27          $data = substr($haystack, $pos, strlen($haystack));
  28       } else {
  29          $data = $haystack;
  30       }
  31       return $data;
  32    }
  33
  34    // Searches for the next position in a string minus white space
  35    function next_pos_minus_white ($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             $i ++;
  77          }
  78
  79          if ($i < count($words)) {
  80             $line .= "\n$beginning_spaces";
  81          }
  82       }
  83    }
  84
  85
  86    // Does the opposite of sqWordWrap()
  87    function sqUnWordWrap(&$body)
  88    {
  89        $lines = explode("\n", $body);
  90        $body = "";
  91        $PreviousSpaces = "";
  92        for ($i = 0; $i < count($lines); $i ++)
  93        {
  94            preg_match("/^([\s>]*)([^\s>].*)?$/", $lines[$i], $regs);
  95            $CurrentSpaces = $regs[1];
  96            $CurrentRest = $regs[2];
  97            if ($i == 0)
  98            {
  99                $PreviousSpaces = $CurrentSpaces;
 100                $body = $lines[$i];
 101            }
 102            else if ($PreviousSpaces == $CurrentSpaces &&  // Do the beginnings match
 103                strlen($lines[$i - 1]) > 65 &&             // Over 65 characters long
 104                strlen($CurrentRest))                      // and there's a line to continue with
 105            {
 106                $body .= ' ' . $CurrentRest;
 107            }
 108            else
 109            {
 110                $body .= "\n" . $lines[$i];
 111                $PreviousSpaces = $CurrentSpaces;
 112            }
 113        }
 114        $body .= "\n";
 115    }
 116
 117
 118    /** Returns an array of email addresses **/
 119    function parseAddrs($text) {
 120       if (trim($text) == "") {
 121          return;
 122       }
 123       $text = str_replace(" ", "", $text);
 124       $text = ereg_replace( '"[^"]*"', "", $text);
 125       $text = str_replace(",", ";", $text);
 126       $array = explode(";", $text);
 127       for ($i = 0; $i < count ($array); $i++) {
 128                             $array[$i] = eregi_replace ("^.*[<]", "", $array[$i]);
 129                             $array[$i] = eregi_replace ("[>].*$", "", $array[$i]);
 130                   }
 131       return $array;
 132    }
 133
 134    /** Returns a line of comma separated email addresses from an array **/
 135    function getLineOfAddrs($array) {
 136       if (is_array($array)) {
 137         $to_line = implode(", ", $array);
 138         $to_line = trim(ereg_replace(",,+", ",", $to_line));
 139       } else {
 140         $to_line = "";
 141       }
 142       return $to_line;
 143    }
 144
 145    function translateText(&$body, $wrap_at, $charset) {
 146       global $where, $what; // from searching
 147
 148       if (!isset($url_parser_php)) {
 149          include "../functions/url_parser.php";
 150       }
 151
 152       $body_ary = explode("\n", $body);
 153       for ($i=0; $i < count($body_ary); $i++) {
 154          $line = $body_ary[$i];
 155          if (strlen($line) - 2 >= $wrap_at) {
 156             sqWordWrap($line, $wrap_at);
 157          }
 158          $line = charset_decode($charset, $line);
 159          $line = str_replace("\t", '        ', $line);
 160
 161          $line = str_replace(' ', '&nbsp;', $line);
 162          $line = nl2br($line);
 163
 164          parseUrl ($line);
 165
 166          $Quotes = 0;
 167          $pos = 0;
 168          while (1)
 169          {
 170              if (strpos($line, '&nbsp;', $pos) === $pos)
 171              {
 172                 $pos += 6;
 173              }
 174              else if (strpos($line, '&gt;', $pos) === $pos)
 175              {
 176                 $pos += 4;
 177                 $Quotes ++;
 178              }
 179              else
 180              {
 181                  break;
 182              }
 183          }
 184
 185          if ($Quotes > 1) {
 186             $line = "<FONT COLOR=FF0000>$line</FONT>\n";
 187          } else if ($Quotes) {
 188             $line = "<FONT COLOR=800000>$line</FONT>\n";
 189          }
 190
 191          if ($line)
 192          {
 193              $line = '<tt>' . $line . '</tt>';
 194          }
 195
 196          $body_ary[$i] = $line . '<br>';
 197       }
 198       $body = implode("\n", $body_ary);
 199    }
 200
 201    /* SquirrelMail version number -- DO NOT CHANGE */
 202    $version = "0.6pre1 (cvs)";
 203
 204
 205    function find_mailbox_name ($mailbox) {
 206       $mailbox = trim($mailbox);
 207       if (substr($mailbox, strlen($mailbox)-1, strlen($mailbox)) == "\"") {
 208          $mailbox = substr($mailbox, 0, strlen($mailbox) - 1);
 209          $pos = strrpos ($mailbox, "\"")+1;
 210          $box = substr($mailbox, $pos);
 211       } else {
 212          $box = substr($mailbox, strrpos($mailbox, " ")+1, strlen($mailbox));
 213       }
 214       return $box;
 215    }
 216
 217    function replace_spaces ($string) {
 218       return str_replace(" ", "&nbsp;", $string);
 219    }
 220
 221    function replace_escaped_spaces ($string) {
 222       return str_replace("&nbsp;", " ", $string);
 223    }
 224
 225    function get_location () {
 226       # This determines the location to forward to relative
 227       # to your server.  If this doesnt work correctly for
 228       # you (although it should), you can remove all this
 229       # code except the last two lines, and change the header()
 230       # function to look something like this, customized to
 231       # the location of SquirrelMail on your server:
 232       #
 233       #   http://www.myhost.com/squirrelmail/src/login.php
 234
 235       global $PHP_SELF, $SERVER_NAME, $HTTPS, $HTTP_HOST, $SERVER_PORT;
 236
 237       // Get the path
 238       $path = substr($PHP_SELF, 0, strrpos($PHP_SELF, '/'));
 239
 240       // Check if this is a HTTPS or regular HTTP request
 241       $proto = "http://";
 242       if(isset($HTTPS) && $HTTPS == 'on' ) {
 243         $proto = "https://";
 244       }
 245
 246       $port = "";
 247       if (isset($SERVER_PORT)) {
 248         if ($SERVER_PORT != 80) {
 249             $port = sprintf(':%d', $SERVER_PORT);
 250         }
 251       }
 252
 253       // Get the hostname from the Host header or server config.
 254       // Fallback is to omit the server name and use a relative URI,
 255       // although this is not RFC 2616 compliant.
 256       if(isset($HTTP_HOST) && !empty($HTTP_HOST)) {
 257         $location = $proto . $HTTP_HOST . $port . $path;
 258       } else if(isset($SERVER_NAME) && !empty($SERVER_NAME)) {
 259         $location = $proto . $SERVER_NAME . $port . $path;
 260       } else {
 261         $location = $path;
 262       }
 263       return $location;
 264    }
 265
 266    function sqStripSlashes($string) {
 267       if (get_magic_quotes_gpc()) {
 268          $string = stripslashes($string);
 269       }
 270       return $string;
 271    }
 272
 273
 274    // These functions are used to encrypt the passowrd before it is
 275    // stored in a cookie.
 276    function OneTimePadEncrypt ($string, $pad) {
 277       for ($i = 0; $i < strlen ($string); $i++) {
 278          $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 279       }
 280
 281       return base64_encode($encrypted);
 282    }
 283
 284    function OneTimePadDecrypt ($string, $pad) {
 285       $encrypted = base64_decode ($string);
 286
 287       for ($i = 0; $i < strlen ($encrypted); $i++) {
 288          $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 289       }
 290
 291       return $decrypted;
 292    }
 293
 294
 295    // Randomize the mt_rand() function.  Toss this in strings or
 296    // integers and it will seed the generator appropriately.
 297    // With strings, it is better to get them long. Use md5() to
 298    // lengthen smaller strings.
 299    function sq_mt_seed($Val)
 300    {
 301        // if mt_getrandmax() does not return a 2^n - 1 number,
 302        // this might not work well.  This uses $Max as a bitmask.
 303        $Max = mt_getrandmax();
 304
 305        if (! is_int($Val))
 306        {
 307            if (function_exists("crc32"))
 308            {
 309                $Val = crc32($Val);
 310            }
 311            else
 312            {
 313                $Str = $Val;
 314                $Pos = 0;
 315                $Val = 0;
 316                $Mask = $Max / 2;
 317                $HighBit = $Max ^ $Mask;
 318                while ($Pos < strlen($Str))
 319                {
 320                    if ($Val & $HighBit)
 321                    {
 322                        $Val = (($Val & $Mask) << 1) + 1;
 323                    }
 324                    else
 325                    {
 326                        $Val = ($Val & $Mask) << 1;
 327                    }
 328                    $Val ^= $Str[$Pos];
 329                    $Pos ++;
 330                }
 331            }
 332        }
 333
 334        if ($Val < 0)
 335          $Val *= -1;
 336        if ($Val = 0)
 337          return;
 338
 339        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 340    }
 341
 342
 343    // This function initializes the random number generator fairly well.
 344    // It also only initializes it once, so you don't accidentally get
 345    // the same 'random' numbers twice in one session.
 346    function sq_mt_randomize()
 347    {
 348       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 349       static $randomized;
 350
 351       if ($randomized)
 352          return;
 353
 354       // Global
 355       sq_mt_seed((int)((double) microtime() * 1000000));
 356       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 357
 358       // getrusage
 359       if (function_exists("getrusage")) {
 360          $dat = getrusage();
 361          sq_mt_seed(md5($dat["ru_nswap"] . $dat["ru_majflt"] .
 362             $dat["ru_utime.tv_sec"] . $dat["ru_utime.tv_usec"]));
 363       }
 364
 365       // Apache-specific
 366       sq_mt_seed(md5($UNIQUE_ID));
 367
 368       $randomized = 1;
 369    }
 370
 371    function OneTimePadCreate ($length=100) {
 372       sq_mt_randomize();
 373
 374       for ($i = 0; $i < $length; $i++) {
 375          $pad .= chr(mt_rand(0,255));
 376       }
 377
 378       return $pad;
 379    }
 380
 381    // Check if we have a required PHP-version. Return TRUE if we do,
 382    // or FALSE if we don't.
 383    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 384    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 385    // Does not handle betas like 4.0.1b1 or development versions
 386    function sqCheckPHPVersion($major, $minor, $release) {
 387
 388       $ver = phpversion();
 389       eregi("^([0-9]+)\.([0-9]+)(.*)", $ver, $regs);
 390
 391       // Parse the version string
 392       $vmajor  = strval($regs[1]);
 393       $vminor  = strval($regs[2]);
 394       $vrel    = $regs[3];
 395       if($vrel[0] == ".")
 396          $vrel = strval(substr($vrel, 1));
 397       if($vrel[0] == "b" || $vrel[0] == "B")
 398          $vrel = - strval(substr($vrel, 1));
 399       if($vrel[0] == "r" || $vrel[0] == "R")
 400          $vrel = - strval(substr($vrel, 2))/10;
 401
 402       // Compare major version
 403       if($vmajor < $major) return false;
 404       if($vmajor > $major) return true;
 405
 406       // Major is the same. Compare minor
 407       if($vminor < $minor) return false;
 408       if($vminor > $minor) return true;
 409
 410       // Major and minor is the same as the required one.
 411       // Compare release
 412       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 413          if($vrel < $release) return false;
 414       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 415          return true;
 416       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 417          return false;
 418       } else {                                // Both are beta
 419          if($vrel > $release) return false;
 420       }
 421
 422       return true;
 423    }
 424
 425    /* Returns a string showing the size of the message/attachment */
 426    function show_readable_size($bytes)
 427    {
 428        $bytes /= 1024;
 429        $type = 'k';
 430
 431        if ($bytes / 1024 > 1)
 432        {
 433            $bytes /= 1024;
 434            $type = 'm';
 435        }
 436
 437        if ($bytes < 10)
 438        {
 439            $bytes *= 10;
 440            settype($bytes, "integer");
 441            $bytes /= 10;
 442        }
 443        else
 444            settype($bytes, "integer");
 445
 446        return $bytes . '<small>&nbsp;' . $type . '</small>';
 447    }
 448
 449    /* Generates a random string from the caracter set you pass in
 450     *
 451     * Flags:
 452     *   1 = add lowercase a-z to $chars
 453     *   2 = add uppercase A-Z to $chars
 454     *   4 = add numbers 0-9 to $chars
 455     */
 456
 457    function GenerateRandomString($size, $chars, $flags = 0)
 458    {
 459       if ($flags & 0x1)
 460           $chars .= 'abcdefghijklmnopqrstuvwxyz';
 461       if ($flags & 0x2)
 462           $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
 463       if ($flags & 0x4)
 464           $chars .= '0123456789';
 465
 466       if ($size < 1 || strlen($chars) < 1)
 467           return "";
 468
 469       sq_mt_randomize(); // Initialize the random number generator
 470
 471       while (strlen($String) < $size) {
 472          $String .= $chars[mt_rand(0, strlen($chars))];
 473       }
 474
 475       return $String;
 476    }
 477
 478 ?>