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 $wrap characters
  48    // Has a problem with special HTML characters, so call this before
  49    // you do character translation.
  50    // Specifically, &#039 comes up as 5 characters instead of 1.
  51    function sqWordWrap(&$line, $wrap) {
  52       preg_match("/^([\s>]*)([^\s>].*)?$/", $line, $regs);
  53       $beginning_spaces = $regs[1];
  54       $regs[2] .= "\n";
  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    /** Returns an array of email addresses **/
  86    function parseAddrs($text) {
  87       if (trim($text) == "") {
  88          return;
  89       }
  90       $text = str_replace(" ", "", $text);
  91       $text = ereg_replace( '"[^"]*"', "", $text);
  92       $text = str_replace(",", ";", $text);
  93       $array = explode(";", $text);
  94       for ($i = 0; $i < count ($array); $i++) {
  95                             $array[$i] = eregi_replace ("^.*[<]", "", $array[$i]);
  96                             $array[$i] = eregi_replace ("[>].*$", "", $array[$i]);
  97                   }
  98       return $array;
  99    }
 100
 101    /** Returns a line of comma separated email addresses from an array **/
 102    function getLineOfAddrs($array) {
 103       if (is_array($array)) {
 104         $to_line = implode(", ", $array);
 105         $to_line = trim(ereg_replace(",,+", ",", $to_line));
 106       } else {
 107         $to_line = "";
 108       }
 109       return $to_line;
 110    }
 111
 112    function translateText(&$body, $wrap_at, $charset) {
 113       global $where, $what; // from searching
 114
 115       if (!isset($url_parser_php)) {
 116          include "../functions/url_parser.php";
 117       }
 118
 119       $body_ary = explode("\n", $body);
 120       for ($i=0; $i < count($body_ary); $i++) {
 121          $line = $body_ary[$i];
 122          if (strlen($line) - 2 >= $wrap_at) {
 123             sqWordWrap($line, $wrap_at);
 124          }
 125          $line = charset_decode($charset, $line);
 126          $line = str_replace("\t", '        ', $line);
 127
 128          $line = str_replace(' ', '&nbsp;', $line);
 129          $line = nl2br($line);
 130
 131          parseUrl ($line);
 132
 133          $Quotes = 0;
 134          $pos = 0;
 135          while (1)
 136          {
 137              if (strpos($line, '&nbsp;', $pos) === $pos)
 138              {
 139                 $pos += 6;
 140              }
 141              else if (strpos($line, '&gt;', $pos) === $pos)
 142              {
 143                 $pos += 4;
 144                 $Quotes ++;
 145              }
 146              else
 147              {
 148                  break;
 149              }
 150          }
 151
 152          if ($Quotes > 1) {
 153             $line = "<FONT COLOR=FF0000>$line</FONT>\n";
 154          } else if ($Quotes) {
 155             $line = "<FONT COLOR=800000>$line</FONT>\n";
 156          }
 157
 158          if ($line)
 159          {
 160              $line = '<tt>' . $line . '</tt>';
 161          }
 162
 163          $body_ary[$i] = $line . '<br>';
 164       }
 165       $body = implode("\n", $body_ary);
 166    }
 167
 168    /* SquirrelMail version number -- DO NOT CHANGE */
 169    $version = "0.6pre1 (cvs)";
 170
 171
 172    function find_mailbox_name ($mailbox) {
 173       $mailbox = trim($mailbox);
 174       if (substr($mailbox, strlen($mailbox)-1, strlen($mailbox)) == "\"") {
 175          $mailbox = substr($mailbox, 0, strlen($mailbox) - 1);
 176          $pos = strrpos ($mailbox, "\"")+1;
 177          $box = substr($mailbox, $pos);
 178       } else {
 179          $box = substr($mailbox, strrpos($mailbox, " ")+1, strlen($mailbox));
 180       }
 181       return $box;
 182    }
 183
 184    function replace_spaces ($string) {
 185       return str_replace(" ", "&nbsp;", $string);
 186    }
 187
 188    function replace_escaped_spaces ($string) {
 189       return str_replace("&nbsp;", " ", $string);
 190    }
 191
 192    function get_location () {
 193       # This determines the location to forward to relative
 194       # to your server.  If this doesnt work correctly for
 195       # you (although it should), you can remove all this
 196       # code except the last two lines, and change the header()
 197       # function to look something like this, customized to
 198       # the location of SquirrelMail on your server:
 199       #
 200       #   http://www.myhost.com/squirrelmail/src/login.php
 201
 202       global $PHP_SELF, $SERVER_NAME, $HTTPS, $HTTP_HOST, $SERVER_PORT;
 203
 204       // Get the path
 205       $path = substr($PHP_SELF, 0, strrpos($PHP_SELF, '/'));
 206
 207       // Check if this is a HTTPS or regular HTTP request
 208       $proto = "http://";
 209       if(isset($HTTPS) && $HTTPS == 'on' ) {
 210         $proto = "https://";
 211       }
 212
 213       $port = "";
 214       if (isset($SERVER_PORT)) {
 215         if ($SERVER_PORT != 80) {
 216             $port = sprintf(':%d', $SERVER_PORT);
 217         }
 218       }
 219
 220       // Get the hostname from the Host header or server config.
 221       // Fallback is to omit the server name and use a relative URI,
 222       // although this is not RFC 2616 compliant.
 223       if(isset($HTTP_HOST) && !empty($HTTP_HOST)) {
 224         $location = $proto . $HTTP_HOST . $port . $path;
 225       } else if(isset($SERVER_NAME) && !empty($SERVER_NAME)) {
 226         $location = $proto . $SERVER_NAME . $port . $path;
 227       } else {
 228         $location = $path;
 229       }
 230       return $location;
 231    }
 232
 233    function sqStripSlashes($string) {
 234       if (get_magic_quotes_gpc()) {
 235          $string = stripslashes($string);
 236       }
 237       return $string;
 238    }
 239
 240
 241    // These functions are used to encrypt the passowrd before it is
 242    // stored in a cookie.
 243    function OneTimePadEncrypt ($string, $pad) {
 244       for ($i = 0; $i < strlen ($string); $i++) {
 245          $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 246       }
 247
 248       return base64_encode($encrypted);
 249    }
 250
 251    function OneTimePadDecrypt ($string, $pad) {
 252       $encrypted = base64_decode ($string);
 253
 254       for ($i = 0; $i < strlen ($encrypted); $i++) {
 255          $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 256       }
 257
 258       return $decrypted;
 259    }
 260
 261
 262    // Randomize the mt_rand() function.  Toss this in strings or
 263    // integers and it will seed the generator appropriately.
 264    // With strings, it is better to get them long. Use md5() to
 265    // lengthen smaller strings.
 266    function sq_mt_seed($Val)
 267    {
 268        // if mt_getrandmax() does not return a 2^n - 1 number,
 269        // this might not work well.  This uses $Max as a bitmask.
 270        $Max = mt_getrandmax();
 271
 272        if (! is_int($Val))
 273        {
 274            if (function_exists("crc32"))
 275            {
 276                $Val = crc32($Val);
 277            }
 278            else
 279            {
 280                $Str = $Val;
 281                $Pos = 0;
 282                $Val = 0;
 283                $Mask = $Max / 2;
 284                $HighBit = $Max ^ $Mask;
 285                while ($Pos < strlen($Str))
 286                {
 287                    if ($Val & $HighBit)
 288                    {
 289                        $Val = (($Val & $Mask) << 1) + 1;
 290                    }
 291                    else
 292                    {
 293                        $Val = ($Val & $Mask) << 1;
 294                    }
 295                    $Val ^= $Str[$Pos];
 296                    $Pos ++;
 297                }
 298            }
 299        }
 300
 301        if ($Val < 0)
 302          $Val *= -1;
 303        if ($Val = 0)
 304          return;
 305
 306        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 307    }
 308
 309
 310    // This function initializes the random number generator fairly well.
 311    // It also only initializes it once, so you don't accidentally get
 312    // the same 'random' numbers twice in one session.
 313    function sq_mt_randomize()
 314    {
 315       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 316       static $randomized;
 317
 318       if ($randomized)
 319          return;
 320
 321       // Global
 322       sq_mt_seed((int)((double) microtime() * 1000000));
 323       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 324
 325       // getrusage
 326       if (function_exists("getrusage")) {
 327          $dat = getrusage();
 328          sq_mt_seed(md5($dat["ru_nswap"] . $dat["ru_majflt"] .
 329             $dat["ru_utime.tv_sec"] . $dat["ru_utime.tv_usec"]));
 330       }
 331
 332       // Apache-specific
 333       sq_mt_seed(md5($UNIQUE_ID));
 334
 335       $randomized = 1;
 336    }
 337
 338    function OneTimePadCreate ($length=100) {
 339       sq_mt_randomize();
 340
 341       for ($i = 0; $i < $length; $i++) {
 342          $pad .= chr(mt_rand(0,255));
 343       }
 344
 345       return $pad;
 346    }
 347
 348    // Check if we have a required PHP-version. Return TRUE if we do,
 349    // or FALSE if we don't.
 350    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 351    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 352    // Does not handle betas like 4.0.1b1 or development versions
 353    function sqCheckPHPVersion($major, $minor, $release) {
 354
 355       $ver = phpversion();
 356       eregi("^([0-9]+)\.([0-9]+)(.*)", $ver, $regs);
 357
 358       // Parse the version string
 359       $vmajor  = strval($regs[1]);
 360       $vminor  = strval($regs[2]);
 361       $vrel    = $regs[3];
 362       if($vrel[0] == ".")
 363          $vrel = strval(substr($vrel, 1));
 364       if($vrel[0] == "b" || $vrel[0] == "B")
 365          $vrel = - strval(substr($vrel, 1));
 366       if($vrel[0] == "r" || $vrel[0] == "R")
 367          $vrel = - strval(substr($vrel, 2))/10;
 368
 369       // Compare major version
 370       if($vmajor < $major) return false;
 371       if($vmajor > $major) return true;
 372
 373       // Major is the same. Compare minor
 374       if($vminor < $minor) return false;
 375       if($vminor > $minor) return true;
 376
 377       // Major and minor is the same as the required one.
 378       // Compare release
 379       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 380          if($vrel < $release) return false;
 381       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 382          return true;
 383       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 384          return false;
 385       } else {                                // Both are beta
 386          if($vrel > $release) return false;
 387       }
 388
 389       return true;
 390    }
 391
 392    /* Returns a string showing the size of the message/attachment */
 393    function show_readable_size($bytes)
 394    {
 395        $bytes /= 1024;
 396        $type = 'k';
 397
 398        if ($bytes / 1024 > 1)
 399        {
 400            $bytes /= 1024;
 401            $type = 'm';
 402        }
 403
 404        if ($bytes < 10)
 405        {
 406            $bytes *= 10;
 407            settype($bytes, "integer");
 408            $bytes /= 10;
 409        }
 410        else
 411            settype($bytes, "integer");
 412
 413        return $bytes . '<small>&nbsp;' . $type . '</small>';
 414    }
 415
 416    /* Generates a random string from the caracter set you pass in
 417     *
 418     * Flags:
 419     *   1 = add lowercase a-z to $chars
 420     *   2 = add uppercase A-Z to $chars
 421     *   4 = add numbers 0-9 to $chars
 422     */
 423
 424    function GenerateRandomString($size, $chars, $flags = 0)
 425    {
 426       if ($flags & 0x1)
 427           $chars .= 'abcdefghijklmnopqrstuvwxyz';
 428       if ($flags & 0x2)
 429           $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
 430       if ($flags & 0x4)
 431           $chars .= '0123456789';
 432
 433       if ($size < 1 || strlen($chars) < 1)
 434           return "";
 435
 436       sq_mt_randomize(); // Initialize the random number generator
 437
 438       while (strlen($String) < $size) {
 439          $String .= $chars[mt_rand(0, strlen($chars))];
 440       }
 441
 442       return $String;
 443    }
 444
 445 ?>