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 $haystack.
   9    //*************************************************************************
  10    function countCharInString($haystack, $needle) {
  11       $haystack = ereg_replace("[^$needle]",'',$haystack);
  12       return strlen($haystack);
  13    }
  14
  15    //*************************************************************************
  16    // Read from the back of $haystack until $needle is found, or the begining
  17    //    of the $haystack is reached.  $needle is a single character
  18    //*************************************************************************
  19    function readShortMailboxName($haystack, $needle) {
  20       if ($needle == '') return $haystack;
  21       if ($needle == '.') $needle = '\.';
  22       ereg("([^$needle]+)$needle?$", $haystack, $regs);
  23       return $regs[1];
  24    }
  25
  26    //*************************************************************************
  27    // Read from the back of $haystack until $needle is found, or the begining
  28    //    of the $haystack is reached.  $needle is a single character
  29    //*************************************************************************
  30    function readMailboxParent($haystack, $needle) {
  31       if ($needle == '.') $needle = '\.';
  32       ereg("^(.+)$needle([^$needle]+)$needle?$", $haystack, $regs);
  33       return $regs[1];
  34    }
  35
  36    // Searches for the next position in a string minus white space
  37    function next_pos_minus_white ($haystack, $pos) {
  38       while (substr($haystack, $pos, 1) == ' ' ||
  39              substr($haystack, $pos, 1) == "\t" ||
  40              substr($haystack, $pos, 1) == "\n" ||
  41              substr($haystack, $pos, 1) == "\r") {
  42          if ($pos >= strlen($haystack))
  43             return -1;
  44          $pos++;
  45       }
  46       return $pos;
  47    }
  48
  49    // Wraps text at $wrap characters
  50    // Has a problem with special HTML characters, so call this before
  51    // you do character translation.
  52    // Specifically, &#039 comes up as 5 characters instead of 1.
  53    // This should not add newlines to the end of lines.
  54    function sqWordWrap(&$line, $wrap) {
  55       preg_match("/^([\s>]*)([^\s>].*)?$/", $line, $regs);
  56       $beginning_spaces = $regs[1];
  57           if (isset($regs[2])) {
  58          $words = explode(' ', $regs[2]);
  59       } else {
  60          $words = "";
  61           }
  62
  63       $i = 0;
  64       $line = $beginning_spaces;
  65
  66       while ($i < count($words)) {
  67          // Force one word to be on a line (minimum)
  68          $line .= $words[$i];
  69          $line_len = strlen($beginning_spaces) + strlen($words[$i]) + 2;
  70          if (isset($words[$i + 1]))
  71              $line_len += strlen($words[$i + 1]);
  72          $i ++;
  73
  74          // Add more words (as long as they fit)
  75          while ($line_len < $wrap && $i < count($words)) {
  76             $line .= ' ' . $words[$i];
  77             $i++;
  78             if (isset($words[$i]))
  79                 $line_len += strlen($words[$i]) + 1;
  80             else
  81                 $line_len += 1;
  82          }
  83
  84          // Skip spaces if they are the first thing on a continued line
  85          while (!isset($words[$i]) && $i < count($words)) {
  86             $i ++;
  87          }
  88
  89          // Go to the next line if we have more to process
  90          if ($i < count($words)) {
  91             $line .= "\n$beginning_spaces";
  92          }
  93       }
  94    }
  95
  96
  97    // Does the opposite of sqWordWrap()
  98    function sqUnWordWrap(&$body)
  99    {
 100        $lines = explode("\n", $body);
 101        $body = "";
 102        $PreviousSpaces = "";
 103        for ($i = 0; $i < count($lines); $i ++)
 104        {
 105            preg_match("/^([\s>]*)([^\s>].*)?$/", $lines[$i], $regs);
 106            $CurrentSpaces = $regs[1];
 107            if (isset($regs[2]))
 108                $CurrentRest = $regs[2];
 109            if ($i == 0)
 110            {
 111                $PreviousSpaces = $CurrentSpaces;
 112                $body = $lines[$i];
 113            }
 114            else if ($PreviousSpaces == $CurrentSpaces &&  // Do the beginnings match
 115                strlen($lines[$i - 1]) > 65 &&             // Over 65 characters long
 116                strlen($CurrentRest))                      // and there's a line to continue with
 117            {
 118                $body .= ' ' . $CurrentRest;
 119            }
 120            else
 121            {
 122                $body .= "\n" . $lines[$i];
 123                $PreviousSpaces = $CurrentSpaces;
 124            }
 125        }
 126        $body .= "\n";
 127    }
 128
 129
 130    /** Returns an array of email addresses **/
 131    /* Be cautious of "user@host.com" */
 132    function parseAddrs($text) {
 133       if (trim($text) == "")
 134          return array();
 135       $text = str_replace(' ', '', $text);
 136       $text = ereg_replace('"[^"]*"', '', $text);
 137       $text = ereg_replace("\([^\)]*\)", '', $text);
 138       $text = str_replace(',', ';', $text);
 139       $array = explode(';', $text);
 140       for ($i = 0; $i < count ($array); $i++) {
 141                             $array[$i] = eregi_replace ("^.*[<]", '', $array[$i]);
 142                             $array[$i] = eregi_replace ("[>].*$", '', $array[$i]);
 143                   }
 144       return $array;
 145    }
 146
 147    /** Returns a line of comma separated email addresses from an array **/
 148    function getLineOfAddrs($array) {
 149       if (is_array($array)) {
 150         $to_line = implode(', ', $array);
 151         $to_line = trim(ereg_replace(',,+', ',', $to_line));
 152       } else {
 153         $to_line = '';
 154       }
 155       return $to_line;
 156    }
 157
 158    function translateText(&$body, $wrap_at, $charset) {
 159       global $where, $what; // from searching
 160                 global $url_parser_php;
 161
 162       if (!isset($url_parser_php)) {
 163          include '../functions/url_parser.php';
 164       }
 165
 166       $body_ary = explode("\n", $body);
 167       $PriorQuotes = 0;
 168       for ($i=0; $i < count($body_ary); $i++) {
 169          $line = $body_ary[$i];
 170          if (strlen($line) - 2 >= $wrap_at) {
 171             sqWordWrap($line, $wrap_at);
 172          }
 173          $line = charset_decode($charset, $line);
 174          $line = str_replace("\t", '        ', $line);
 175
 176          parseUrl ($line);
 177
 178          $Quotes = 0;
 179          $pos = 0;
 180          while (1)
 181          {
 182              if ($line[$pos] == ' ')
 183              {
 184                 $pos ++;
 185              }
 186              else if (strpos($line, '&gt;', $pos) === $pos)
 187              {
 188                 $pos += 4;
 189                 $Quotes ++;
 190              }
 191              else
 192              {
 193                  break;
 194              }
 195          }
 196
 197          if ($Quotes > 1)
 198             $line = '<FONT COLOR="FF0000">'.$line.'</FONT>';
 199          elseif ($Quotes)
 200             $line = '<FONT COLOR="800000">'.$line.'</FONT>';
 201
 202          $body_ary[$i] = $line;
 203       }
 204       $body = '<pre>' . implode("\n", $body_ary) . '</pre>';
 205    }
 206
 207    /* SquirrelMail version number -- DO NOT CHANGE */
 208    $version = '1.0.1 [cvs]';
 209
 210
 211    function find_mailbox_name ($mailbox) {
 212 /*
 213       $mailbox = trim($mailbox);
 214       if (substr($mailbox, strlen($mailbox)-1, strlen($mailbox)) == '"') {
 215          $mailbox = substr($mailbox, 0, strlen($mailbox) - 1);
 216          $pos = strrpos ($mailbox, '"')+1;
 217          $box = substr($mailbox, $pos);
 218       } else {
 219          $box = substr($mailbox, strrpos($mailbox, ' ')+1, strlen($mailbox));
 220       }
 221       return $box;
 222 */
 223
 224       if (ereg(" *\"([^\r\n\"]*)\"[ \r\n]*$", $mailbox, $regs))
 225           return $regs[1];
 226       ereg(" *([^ \r\n\"]*)[ \r\n]*$",$mailbox,$regs);
 227       return $regs[1];
 228
 229    }
 230
 231    function replace_spaces ($string) {
 232       return str_replace(' ', '&nbsp;', $string);
 233    }
 234
 235    function replace_escaped_spaces ($string) {
 236       return str_replace('&nbsp;', ' ', $string);
 237    }
 238
 239    function get_location () {
 240       # This determines the location to forward to relative
 241       # to your server.  If this doesnt work correctly for
 242       # you (although it should), you can remove all this
 243       # code except the last two lines, and change the header()
 244       # function to look something like this, customized to
 245       # the location of SquirrelMail on your server:
 246       #
 247       #   http://www.myhost.com/squirrelmail/src/login.php
 248
 249       global $PHP_SELF, $SERVER_NAME, $HTTPS, $HTTP_HOST, $SERVER_PORT;
 250
 251       // Get the path
 252       $path = substr($PHP_SELF, 0, strrpos($PHP_SELF, '/'));
 253
 254       // Check if this is a HTTPS or regular HTTP request
 255       $proto = 'http://';
 256       if(isset($HTTPS) && !strcasecmp($HTTPS, 'on') ) {
 257         $proto = 'https://';
 258       }
 259
 260       // Get the hostname from the Host header or server config.
 261       $host = '';
 262       if (isset($HTTP_HOST) && !empty($HTTP_HOST))
 263       {
 264           $host = $HTTP_HOST;
 265       }
 266       else if (isset($SERVER_NAME) && !empty($SERVER_NAME))
 267       {
 268           $host = $SERVER_NAME;
 269       }
 270
 271       $port = '';
 272       if (! strstr($host, ':'))
 273       {
 274           if (isset($SERVER_PORT)) {
 275               if (($SERVER_PORT != 80 && $proto == 'http://')
 276                       || ($SERVER_PORT != 443 && $proto == 'https://')) {
 277                   $port = sprintf(':%d', $SERVER_PORT);
 278               }
 279           }
 280       }
 281
 282       if ($host)
 283           return $proto . $host . $port . $path;
 284
 285       // Fallback is to omit the server name and use a relative URI,
 286       // although this is not RFC 2616 compliant.
 287       return $path;
 288    }
 289
 290    function sqStripSlashes($string) {
 291       if (get_magic_quotes_gpc()) {
 292          $string = stripslashes($string);
 293       }
 294       return $string;
 295    }
 296
 297
 298    // These functions are used to encrypt the passowrd before it is
 299    // stored in a cookie.
 300    function OneTimePadEncrypt ($string, $epad) {
 301       $pad = base64_decode($epad);
 302       $encrypted = '';
 303       for ($i = 0; $i < strlen ($string); $i++) {
 304          $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 305       }
 306
 307       return base64_encode($encrypted);
 308    }
 309
 310    function OneTimePadDecrypt ($string, $epad) {
 311       $pad = base64_decode($epad);
 312       $encrypted = base64_decode ($string);
 313       $decrypted = '';
 314       for ($i = 0; $i < strlen ($encrypted); $i++) {
 315          $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 316       }
 317
 318       return $decrypted;
 319    }
 320
 321
 322    // Randomize the mt_rand() function.  Toss this in strings or
 323    // integers and it will seed the generator appropriately.
 324    // With strings, it is better to get them long. Use md5() to
 325    // lengthen smaller strings.
 326    function sq_mt_seed($Val)
 327    {
 328        // if mt_getrandmax() does not return a 2^n - 1 number,
 329        // this might not work well.  This uses $Max as a bitmask.
 330        $Max = mt_getrandmax();
 331
 332        if (! is_int($Val))
 333        {
 334            if (function_exists('crc32'))
 335            {
 336                $Val = crc32($Val);
 337            }
 338            else
 339            {
 340                $Str = $Val;
 341                $Pos = 0;
 342                $Val = 0;
 343                $Mask = $Max / 2;
 344                $HighBit = $Max ^ $Mask;
 345                while ($Pos < strlen($Str))
 346                {
 347                    if ($Val & $HighBit)
 348                    {
 349                        $Val = (($Val & $Mask) << 1) + 1;
 350                    }
 351                    else
 352                    {
 353                        $Val = ($Val & $Mask) << 1;
 354                    }
 355                    $Val ^= $Str[$Pos];
 356                    $Pos ++;
 357                }
 358            }
 359        }
 360
 361        if ($Val < 0)
 362          $Val *= -1;
 363        if ($Val = 0)
 364          return;
 365
 366        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 367    }
 368
 369
 370    // This function initializes the random number generator fairly well.
 371    // It also only initializes it once, so you don't accidentally get
 372    // the same 'random' numbers twice in one session.
 373    function sq_mt_randomize()
 374    {
 375       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 376       static $randomized;
 377
 378       if ($randomized)
 379          return;
 380
 381       // Global
 382       sq_mt_seed((int)((double) microtime() * 1000000));
 383       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 384
 385       // getrusage
 386       if (function_exists('getrusage')) {
 387          $dat = getrusage();
 388          $Str = '';
 389          foreach ($dat as $k => $v)
 390          {
 391              $Str .= "$k = $v\n";
 392          }
 393          sq_mt_seed(md5($Str));
 394       }
 395
 396       // Apache-specific
 397       sq_mt_seed(md5($UNIQUE_ID));
 398
 399       $randomized = 1;
 400    }
 401
 402    function OneTimePadCreate ($length=100) {
 403       sq_mt_randomize();
 404
 405       $pad = '';
 406       for ($i = 0; $i < $length; $i++) {
 407          $pad .= chr(mt_rand(0,255));
 408       }
 409
 410       return base64_encode($pad);
 411    }
 412
 413    // Check if we have a required PHP-version. Return TRUE if we do,
 414    // or FALSE if we don't.
 415    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 416    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 417    // Does not handle betas like 4.0.1b1 or development versions
 418    function sqCheckPHPVersion($major, $minor, $release) {
 419
 420       $ver = phpversion();
 421       eregi("^([0-9]+)\.([0-9]+)(.*)", $ver, $regs);
 422
 423       // Parse the version string
 424       $vmajor  = strval($regs[1]);
 425       $vminor  = strval($regs[2]);
 426       $vrel    = $regs[3];
 427       if($vrel[0] == ".")
 428          $vrel = strval(substr($vrel, 1));
 429       if($vrel[0] == 'b' || $vrel[0] == 'B')
 430          $vrel = - strval(substr($vrel, 1));
 431       if($vrel[0] == 'r' || $vrel[0] == 'R')
 432          $vrel = - strval(substr($vrel, 2))/10;
 433
 434       // Compare major version
 435       if($vmajor < $major) return false;
 436       if($vmajor > $major) return true;
 437
 438       // Major is the same. Compare minor
 439       if($vminor < $minor) return false;
 440       if($vminor > $minor) return true;
 441
 442       // Major and minor is the same as the required one.
 443       // Compare release
 444       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 445          if($vrel < $release) return false;
 446       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 447          return true;
 448       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 449          return false;
 450       } else {                                // Both are beta
 451          if($vrel > $release) return false;
 452       }
 453
 454       return true;
 455    }
 456
 457    /* Returns a string showing the size of the message/attachment */
 458    function show_readable_size($bytes)
 459    {
 460        $bytes /= 1024;
 461        $type = 'k';
 462
 463        if ($bytes / 1024 > 1)
 464        {
 465            $bytes /= 1024;
 466            $type = 'm';
 467        }
 468
 469        if ($bytes < 10)
 470        {
 471            $bytes *= 10;
 472            settype($bytes, 'integer');
 473            $bytes /= 10;
 474        }
 475        else
 476            settype($bytes, 'integer');
 477
 478        return $bytes . '<small>&nbsp;' . $type . '</small>';
 479    }
 480
 481    /* Generates a random string from the caracter set you pass in
 482     *
 483     * Flags:
 484     *   1 = add lowercase a-z to $chars
 485     *   2 = add uppercase A-Z to $chars
 486     *   4 = add numbers 0-9 to $chars
 487     */
 488
 489    function GenerateRandomString($size, $chars, $flags = 0)
 490    {
 491       if ($flags & 0x1)
 492           $chars .= 'abcdefghijklmnopqrstuvwxyz';
 493       if ($flags & 0x2)
 494           $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
 495       if ($flags & 0x4)
 496           $chars .= '0123456789';
 497
 498       if ($size < 1 || strlen($chars) < 1)
 499           return '';
 500
 501       sq_mt_randomize(); // Initialize the random number generator
 502
 503           $String = "";
 504       while (strlen($String) < $size) {
 505          $String .= $chars[mt_rand(0, strlen($chars))];
 506       }
 507
 508       return $String;
 509    }
 510
 511 ?>