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 $wrap characters
  48    function sqWordWrap($passed, $wrap) {
  49       $passed = str_replace("&lt;", "<", $passed);
  50       $passed = str_replace("&gt;", ">", $passed);
  51
  52       preg_match("/^(\s|>)+/", $passed, $regs);
  53       $beginning_spaces = $regs[0];
  54
  55       $words = explode(" ", $passed);
  56       $i = -1;
  57       $line_len = strlen($words[0])+1;
  58       $line = "";
  59       if (count($words) > 1) {
  60          while ($i++ < count($words)) {
  61             while ($line_len < $wrap) {
  62                $line = "$line$words[$i] ";
  63                $i++;
  64                $line_len = $line_len + strlen($words[$i]) + 1;
  65             }
  66             $line_len = strlen($words[$i])+1;
  67             if ($line_len <= $wrap) {
  68                if (strlen($beginning_spaces) +2 >= $wrap)
  69                   $beginning_spaces = "";
  70                if ($i < count($words)) { // don't <BR> the last line
  71                   $line = "$line\n$beginning_spaces";
  72                }
  73                $line = "$line$words[$i] ";
  74                $line_len = strlen($beginning_spaces) + strlen($words[$i]) + 1;
  75             } else {
  76                /*
  77                $endline = $words[$i];
  78                while ($line_len >= $wrap) {
  79                   $bigline = substr($endline, 0, $wrap);
  80                   $endline = substr($endline, $wrap, strlen($endline));
  81                   $line_len = strlen($endline);
  82                   $line = "$line$bigline<BR>";
  83                }
  84                */
  85                if (strlen($line) > $wrap)
  86                   $line = "$line\n$words[$i]";
  87                else
  88                   $line = "$line$words[$i]";
  89                $line_len = strlen($words[$i]);
  90             }
  91          }
  92       } else {
  93          $line = $words[0];
  94       }
  95
  96       $line = str_replace(">", "&gt;", $line);
  97       $line = str_replace("<", "&lt;", $line);
  98       return $line;
  99    }
 100
 101    /** Returns an array of email addresses **/
 102    function parseAddrs($text) {
 103       if (trim($text) == "") {
 104          return;
 105       }
 106       $text = str_replace(" ", "", $text);
 107       $text = ereg_replace( '"[^"]*"', "", $text);
 108       $text = str_replace(",", ";", $text);
 109       $array = explode(";", $text);
 110       for ($i = 0; $i < count ($array); $i++) {
 111                             $array[$i] = eregi_replace ("^.*[<]", "", $array[$i]);
 112                             $array[$i] = eregi_replace ("[>].*$", "", $array[$i]);
 113                   }
 114       return $array;
 115    }
 116
 117    /** Returns a line of comma separated email addresses from an array **/
 118    function getLineOfAddrs($array) {
 119       if (is_array($array)) {
 120         $to_line = implode(", ", $array);
 121         $to_line = trim(ereg_replace(",,+", ",", $to_line));
 122       } else {
 123         $to_line = "";
 124       }
 125       return $to_line;
 126    }
 127
 128    function translateText($body, $wrap_at, $charset) {
 129       global $where, $what; // from searching
 130
 131       if (!isset($url_parser_php)) {
 132          include "../functions/url_parser.php";
 133       }
 134
 135       $body_ary = explode("\n", $body);
 136       for ($i=0; $i < count($body_ary); $i++) {
 137          $line = $body_ary[$i];
 138          $line = charset_decode($charset, $line);
 139          $line = str_replace("\t", '        ', $line);
 140
 141          if (strlen($line) - 2 >= $wrap_at) {
 142             $line = sqWordWrap($line, $wrap_at);
 143          }
 144
 145          $line = str_replace(' ', '&nbsp;', $line);
 146          $line = nl2br($line);
 147
 148          // Removed parseEmail and integrated it into parseUrl
 149          // This line is no longer needed.
 150          // $line = parseEmail ($line);
 151          $line = parseUrl ($line);
 152
 153          $test_line = str_replace('&nbsp;', '', $line);
 154          if (strpos($test_line, '&gt;&gt;') === 0) {
 155             $line = "<FONT COLOR=FF0000>$line</FONT>\n";
 156          } else if (strpos($test_line, '&gt;') === 0) {
 157             $line = "<FONT COLOR=800000>$line</FONT>\n";
 158          }
 159
 160          if ($line)
 161          {
 162              $line = '<tt>' . $line . '</tt>';
 163          }
 164
 165          $body_ary[$i] = $line . '<br>';
 166       }
 167       $body = implode("\n", $body_ary);
 168
 169       return $body;
 170    }
 171
 172    /* SquirrelMail version number -- DO NOT CHANGE */
 173    $version = "0.6pre1 (cvs)";
 174
 175
 176    function find_mailbox_name ($mailbox) {
 177       $mailbox = trim($mailbox);
 178       if (substr($mailbox, strlen($mailbox)-1, strlen($mailbox)) == "\"") {
 179          $mailbox = substr($mailbox, 0, strlen($mailbox) - 1);
 180          $pos = strrpos ($mailbox, "\"")+1;
 181          $box = substr($mailbox, $pos);
 182       } else {
 183          $box = substr($mailbox, strrpos($mailbox, " ")+1, strlen($mailbox));
 184       }
 185       return $box;
 186    }
 187
 188    function replace_spaces ($string) {
 189       return str_replace(" ", "&nbsp;", $string);
 190    }
 191
 192    function replace_escaped_spaces ($string) {
 193       return str_replace("&nbsp;", " ", $string);
 194    }
 195
 196    function get_location () {
 197       # This determines the location to forward to relative
 198       # to your server.  If this doesnt work correctly for
 199       # you (although it should), you can remove all this
 200       # code except the last two lines, and change the header()
 201       # function to look something like this, customized to
 202       # the location of SquirrelMail on your server:
 203       #
 204       #   http://www.myhost.com/squirrelmail/src/login.php
 205
 206       global $PHP_SELF, $SERVER_NAME, $HTTPS, $HTTP_HOST, $SERVER_PORT;
 207
 208       // Get the path
 209       $path = substr($PHP_SELF, 0, strrpos($PHP_SELF, '/'));
 210
 211       // Check if this is a HTTPS or regular HTTP request
 212       $proto = "http://";
 213       if(isset($HTTPS) && $HTTPS == 'on' ) {
 214         $proto = "https://";
 215       }
 216
 217       $port = "";
 218       if (isset($SERVER_PORT)) {
 219         if ($SERVER_PORT != 80) {
 220             $port = sprintf(':%d', $SERVER_PORT);
 221         }
 222       }
 223
 224       // Get the hostname from the Host header or server config.
 225       // Fallback is to omit the server name and use a relative URI,
 226       // although this is not RFC 2616 compliant.
 227       if(isset($HTTP_HOST) && !empty($HTTP_HOST)) {
 228         $location = $proto . $HTTP_HOST . $port . $path;
 229       } else if(isset($SERVER_NAME) && !empty($SERVER_NAME)) {
 230         $location = $proto . $SERVER_NAME . $port . $path;
 231       } else {
 232         $location = $path;
 233       }
 234       return $location;
 235    }
 236
 237    function sqStripSlashes($string) {
 238       if (get_magic_quotes_gpc()) {
 239          $string = stripslashes($string);
 240       }
 241       return $string;
 242    }
 243
 244
 245    // These functions are used to encrypt the passowrd before it is
 246    // stored in a cookie.
 247    function OneTimePadEncrypt ($string, $pad) {
 248       for ($i = 0; $i < strlen ($string); $i++) {
 249          $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 250       }
 251
 252       return base64_encode($encrypted);
 253    }
 254
 255    function OneTimePadDecrypt ($string, $pad) {
 256       $encrypted = base64_decode ($string);
 257
 258       for ($i = 0; $i < strlen ($encrypted); $i++) {
 259          $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 260       }
 261
 262       return $decrypted;
 263    }
 264
 265
 266    // Randomize the mt_rand() function.  Toss this in strings or
 267    // integers and it will seed the generator appropriately.
 268    // With strings, it is better to get them long. Use md5() to
 269    // lengthen smaller strings.
 270    function sq_mt_seed($Val)
 271    {
 272        // if mt_getrandmax() does not return a 2^n - 1 number,
 273        // this might not work well.  This uses $Max as a bitmask.
 274        $Max = mt_getrandmax();
 275
 276        if (! is_int($Val))
 277        {
 278            if (function_exists("crc32"))
 279            {
 280                $Val = crc32($Val);
 281            }
 282            else
 283            {
 284                $Str = $Val;
 285                $Pos = 0;
 286                $Val = 0;
 287                $Mask = $Max / 2;
 288                $HighBit = $Max ^ $Mask;
 289                while ($Pos < strlen($Str))
 290                {
 291                    if ($Val & $HighBit)
 292                    {
 293                        $Val = (($Val & $Mask) << 1) + 1;
 294                    }
 295                    else
 296                    {
 297                        $Val = ($Val & $Mask) << 1;
 298                    }
 299                    $Val ^= $Str[$Pos];
 300                    $Pos ++;
 301                }
 302            }
 303        }
 304
 305        if ($Val < 0)
 306          $Val *= -1;
 307        if ($Val = 0)
 308          return;
 309
 310        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 311    }
 312
 313
 314    // This function initializes the random number generator fairly well.
 315    // It also only initializes it once, so you don't accidentally get
 316    // the same 'random' numbers twice in one session.
 317    function sq_mt_randomize()
 318    {
 319       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 320       static $randomized;
 321
 322       if ($randomized)
 323          return;
 324
 325       // Global
 326       sq_mt_seed((int)((double) microtime() * 1000000));
 327       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 328
 329       // getrusage
 330       if (function_exists("getrusage")) {
 331          $dat = getrusage();
 332          sq_mt_seed(md5($dat["ru_nswap"] . $dat["ru_majflt"] .
 333             $dat["ru_utime.tv_sec"] . $dat["ru_utime.tv_usec"]));
 334       }
 335
 336       // Apache-specific
 337       sq_mt_seed(md5($UNIQUE_ID));
 338
 339       $randomized = 1;
 340    }
 341
 342    function OneTimePadCreate ($length=100) {
 343       sq_mt_randomize();
 344
 345       for ($i = 0; $i < $length; $i++) {
 346          $pad .= chr(mt_rand(0,255));
 347       }
 348
 349       return $pad;
 350    }
 351
 352    // Check if we have a required PHP-version. Return TRUE if we do,
 353    // or FALSE if we don't.
 354    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 355    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 356    // Does not handle betas like 4.0.1b1 or development versions
 357    function sqCheckPHPVersion($major, $minor, $release) {
 358
 359       $ver = phpversion();
 360       eregi("^([0-9]+)\.([0-9]+)(.*)", $ver, $regs);
 361
 362       // Parse the version string
 363       $vmajor  = strval($regs[1]);
 364       $vminor  = strval($regs[2]);
 365       $vrel    = $regs[3];
 366       if($vrel[0] == ".")
 367          $vrel = strval(substr($vrel, 1));
 368       if($vrel[0] == "b" || $vrel[0] == "B")
 369          $vrel = - strval(substr($vrel, 1));
 370       if($vrel[0] == "r" || $vrel[0] == "R")
 371          $vrel = - strval(substr($vrel, 2))/10;
 372
 373       // Compare major version
 374       if($vmajor < $major) return false;
 375       if($vmajor > $major) return true;
 376
 377       // Major is the same. Compare minor
 378       if($vminor < $minor) return false;
 379       if($vminor > $minor) return true;
 380
 381       // Major and minor is the same as the required one.
 382       // Compare release
 383       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 384          if($vrel < $release) return false;
 385       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 386          return true;
 387       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 388          return false;
 389       } else {                                // Both are beta
 390          if($vrel > $release) return false;
 391       }
 392
 393       return true;
 394    }
 395
 396 ?>