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    $version = "0.5";
 174
 175
 176    function find_mailbox_name ($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, $HTTP_SERVER_VARS;
 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         $proto = "https://";
 215       }
 216
 217       if ($HTTP_SERVER_VARS['SERVER_PORT']) {
 218         if ($HTTP_SERVER_VARS['SERVER_PORT'] != 80) {
 219             $port = ':' . $HTTP_SERVER_VARS['SERVER_PORT'];
 220         }
 221       }
 222
 223       // Get the hostname from the Host header or server config.
 224       // Fallback is to omit the server name and use a relative URI,
 225       // although this is not RFC 2616 compliant.
 226       if(isset($HTTP_HOST) && !empty($HTTP_HOST)) {
 227         $location = $proto . $HTTP_HOST . $port . $path;
 228       } else if(isset($SERVER_NAME) && !empty($SERVER_NAME)) {
 229         $location = $proto . $SERVER_NAME . $port . $path;
 230       } else {
 231         $location = $path;
 232       }
 233       return $location;
 234    }
 235
 236    function sqStripSlashes($string) {
 237       if (get_magic_quotes_gpc()) {
 238          $string = stripslashes($string);
 239       }
 240       return $string;
 241    }
 242
 243
 244    // These functions are used to encrypt the passowrd before it is
 245    // stored in a cookie.
 246    function OneTimePadEncrypt ($string, $pad) {
 247       for ($i = 0; $i < strlen ($string); $i++) {
 248          $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i]));
 249       }
 250
 251       return base64_encode($encrypted);
 252    }
 253
 254    function OneTimePadDecrypt ($string, $pad) {
 255       $encrypted = base64_decode ($string);
 256
 257       for ($i = 0; $i < strlen ($encrypted); $i++) {
 258          $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i]));
 259       }
 260
 261       return $decrypted;
 262    }
 263
 264
 265    // Randomize the mt_rand() function.  Toss this in strings or
 266    // integers and it will seed the generator appropriately.
 267    // With strings, it is better to get them long. Use md5() to
 268    // lengthen smaller strings.
 269    function sq_mt_seed($Val)
 270    {
 271        // if mt_getrandmax() does not return a 2^n - 1 number,
 272        // this might not work well.  This uses $Max as a bitmask.
 273        $Max = mt_getrandmax();
 274
 275        if (! is_int($Val))
 276        {
 277            if (function_exists("crc32"))
 278            {
 279                $Val = crc32($Val);
 280            }
 281            else
 282            {
 283                $Str = $Val;
 284                $Pos = 0;
 285                $Val = 0;
 286                $Mask = $Max / 2;
 287                $HighBit = $Max ^ $Mask;
 288                while ($Pos < strlen($Str))
 289                {
 290                    if ($Val & $HighBit)
 291                    {
 292                        $Val = (($Val & $Mask) << 1) + 1;
 293                    }
 294                    else
 295                    {
 296                        $Val = ($Val & $Mask) << 1;
 297                    }
 298                    $Val ^= $Str[$Pos];
 299                    $Pos ++;
 300                }
 301            }
 302        }
 303
 304        if ($Val < 0)
 305          $Val *= -1;
 306        if ($Val = 0)
 307          return;
 308
 309        mt_srand(($Val ^ mt_rand(0, $Max)) & $Max);
 310    }
 311
 312
 313    // This function initializes the random number generator fairly well.
 314    // It also only initializes it once, so you don't accidentally get
 315    // the same 'random' numbers twice in one session.
 316    function sq_mt_randomize()
 317    {
 318       global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID;
 319       static $randomized;
 320
 321       if ($randomized)
 322          return;
 323
 324       // Global
 325       sq_mt_seed((int)((double) microtime() * 1000000));
 326       sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid()));
 327
 328       // getrusage
 329       if (function_exists("getrusage")) {
 330          $dat = getrusage();
 331          sq_mt_seed(md5($dat["ru_nswap"] . $dat["ru_majflt"] .
 332             $dat["ru_utime.tv_sec"] . $dat["ru_utime.tv_usec"]));
 333       }
 334
 335       // Apache-specific
 336       sq_mt_seed(md5($UNIQUE_ID));
 337
 338       $randomized = 1;
 339    }
 340
 341    function OneTimePadCreate ($length=100) {
 342       sq_mt_randomize();
 343
 344       for ($i = 0; $i < $length; $i++) {
 345          $pad .= chr(mt_rand(0,255));
 346       }
 347
 348       return $pad;
 349    }
 350
 351    // Check if we have a required PHP-version. Return TRUE if we do,
 352    // or FALSE if we don't.
 353    // To check for 4.0.1, use sqCheckPHPVersion(4,0,1)
 354    // To check for 4.0b3, use sqCheckPHPVersion(4,0,-3)
 355    // Does not handle betas like 4.0.1b1 or development versions
 356    function sqCheckPHPVersion($major, $minor, $release) {
 357
 358       $ver = phpversion();
 359       eregi("^([0-9]+)\.([0-9]+)(.*)", $ver, $regs);
 360
 361       // Parse the version string
 362       $vmajor  = strval($regs[1]);
 363       $vminor  = strval($regs[2]);
 364       $vrel    = $regs[3];
 365       if($vrel[0] == ".")
 366          $vrel = strval(substr($vrel, 1));
 367       if($vrel[0] == "b" || $vrel[0] == "B")
 368          $vrel = - strval(substr($vrel, 1));
 369       if($vrel[0] == "r" || $vrel[0] == "R")
 370          $vrel = - strval(substr($vrel, 2))/10;
 371
 372       // Compare major version
 373       if($vmajor < $major) return false;
 374       if($vmajor > $major) return true;
 375
 376       // Major is the same. Compare minor
 377       if($vminor < $minor) return false;
 378       if($vminor > $minor) return true;
 379
 380       // Major and minor is the same as the required one.
 381       // Compare release
 382       if($vrel >= 0 && $release >= 0) {       // Neither are beta
 383          if($vrel < $release) return false;
 384       } else if($vrel >= 0 && $release < 0){  // This is not beta, required is beta
 385          return true;
 386       } else if($vrel < 0 && $release >= 0){  // This is beta, require not beta
 387          return false;
 388       } else {                                // Both are beta
 389          if($vrel > $release) return false;
 390       }
 391
 392       return true;
 393    }
 394
 395 ?>