Functions.php

   1 <?php
   2 /*=====================================================================*\
   3 || ###################################################################
   4 || # Blue Static ISSO Framework
   5 || # Copyright ©2002-[#]year[#] Blue Static
   6 || #
   7 || # This program is free software; you can redistribute it and/or modify
   8 || # it under the terms of the GNU General Public License as published by
   9 || # the Free Software Foundation; version [#]gpl[#] of the License.
  10 || #
  11 || # This program is distributed in the hope that it will be useful, but
  12 || # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13 || # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  14 || # more details.
  15 || #
  16 || # You should have received a copy of the GNU General Public License along
  17 || # with this program; if not, write to the Free Software Foundation, Inc.,
  18 || # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  19 || ###################################################################
  20 \*=====================================================================*/
  21
  22 /**
  23 * Static functions (Functions.php)
  24 *
  25 * @package      ISSO
  26 */
  27
  28 /**
  29 * Functions
  30 *
  31 * This is a bunch of static functions. This class is singleton so it
  32 * can store data while remaining static.
  33 *
  34 * @author               Blue Static
  35 * @copyright    Copyright ©2002 - [#]year[#], Blue Static
  36 * @version              $Revision$
  37 * @package              ISSO
  38 *
  39 */
  40 class BSFunctions
  41 {
  42         /**
  43         * Singleton instance
  44         * @var  object
  45         */
  46         private static $instance;
  47
  48         /**
  49         * Cookie path
  50         * @var  string
  51         */
  52         private $cookiePath = '/';
  53
  54         /**
  55         * Cookie domain setting
  56         * @var  string
  57         */
  58         private $cookieDomain = '';
  59
  60         /**
  61         * Cookie expiration time
  62         * @var  integer
  63         */
  64         private $cookieTimeout = 900;
  65
  66         /**
  67         * Current swapped CSS class
  68         * @var  string
  69         */
  70         public static $cssClass = '';
  71
  72         // ###################################################################
  73         /**
  74         * Constructor
  75         */
  76         private function __construct() {}
  77
  78         // ###################################################################
  79         /**
  80         * Returns the shared instance for singleton
  81         *
  82         * @return       object  Shared instance
  83         */
  84         private function SharedInstance()
  85         {
  86                 if (!self::$instance)
  87                 {
  88                         self::$instance = new BSFunctions;
  89                 }
  90                 return self::$instance;
  91         }
  92
  93         // ###################################################################
  94         /**
  95         * Sets the cookie path
  96         *
  97         * @param        string  New path
  98         */
  99         public static function SetCookiePath($path)
 100         {
 101                 self::SharedInstance()->cookiePath = $path;
 102         }
 103
 104         // ###################################################################
 105         /**
 106         * Sets the cookie domain setting
 107         *
 108         * @param        string  Cookie domain
 109         */
 110         public static function SetCookieDomain($domain)
 111         {
 112                 self::SharedInstance()->cookieDomain = $domain;
 113         }
 114
 115         // ###################################################################
 116         /**
 117         * Sets the cookie timeout
 118         *
 119         * @param        integer Cookie timeout
 120         */
 121         public static function SetCookieTimeout($timeout)
 122         {
 123                 self::SharedInstance()->cookieTimeout = intval($timeout);
 124         }
 125
 126         // ###################################################################
 127         /**
 128         * Sets a cookie in the user's computer/browing session
 129         *
 130         * @param        string  Name of the cookie
 131         * @param        string  Value of the cookie, FALSE to clear
 132         * @param        bool    Is the cookie permanent?
 133         */
 134         public static function Cookie($name, $value, $sticky = true)
 135         {
 136                 // expire the cookie
 137                 if ($value === false)
 138                 {
 139                         setcookie($name, $value, time() - (2 * self::SharedInstance()->cookieTimeout), self::SharedInstance()->cookiePath, self::SharedInstance()->cookieDomain);
 140                 }
 141                 // set the cookie
 142                 else
 143                 {
 144                         if ($sticky)
 145                         {
 146                                 $expire = time() + 60 * 60 * 24 * 365;
 147                         }
 148                         else
 149                         {
 150                                 $expire = time() + self::SharedInstance()->cookieTimeout;
 151                         }
 152
 153                         setcookie($name, $value, $expire, self::SharedInstance()->cookiePath, self::SharedInstance()->cookieDomain);
 154                 }
 155         }
 156
 157         // ###################################################################
 158         /**
 159         * Alternate between two CSS classes
 160         *
 161         * @param        string  First CSS class name
 162         * @param        string  Second CSS class name
 163         */
 164         public function SwapCssClasses($class1 = 'alt1', $class2 = 'alt2')
 165         {
 166                 static $count;
 167
 168                 self::$cssClass = ($count % 2) ? $class1 : $class2;
 169                 $count++;
 170         }
 171
 172         // ###################################################################
 173         /**
 174         * Returns the 'source path' version of a file path. It adds a
 175         * directory separator to the end of a string if it does not already
 176         * exist.
 177         *
 178         * @param        string  Path
 179         *
 180         * @return       string  Path with directory separator ending
 181         */
 182         public static function FetchSourcePath($source)
 183         {
 184                 if (substr($source, strlen($source) - 1) != DIRECTORY_SEPARATOR)
 185                 {
 186                         $source .= DIRECTORY_SEPARATOR;
 187                 }
 188                 return $source;
 189         }
 190
 191         // ###################################################################
 192         /**
 193         * Force-download a file by sending application/octetstream
 194         *
 195         * @param        string  The text of the file to be streamed
 196         * @param        string  File name of the new file
 197         * @param        bool    Whether or not to die after stringeaming the file
 198         */
 199         public static function DownloadFile($file, $name, $exit = true)
 200         {
 201                 if (self::IsBrowser('ie') OR self::IsBrowser('opera') OR self::IsBrowser('safari'))
 202                 {
 203                         $mime = 'application/octetstream';
 204                 }
 205                 else
 206                 {
 207                         $mime = 'application/octet-stream';
 208                 }
 209
 210                 header("Content-Type: $mime");
 211                 header('Expires: ' . gmdate('D, d M Y H:i:s') . ' GMT');
 212                 header('Content-Disposition: attachment; filename="' . $name . '"');
 213                 header('Content-length: ' . strlen($file));
 214                 header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
 215                 header('Pragma: public');
 216
 217                 print($file);
 218
 219                 if ($exit)
 220                 {
 221                         exit;
 222                 }
 223         }
 224
 225         // ###################################################################
 226         /**
 227         * Verify that an email address is valid via regex
 228         *
 229         * @param        string  An email address
 230         *
 231         * @return       bool    Validity of the email address
 232         */
 233         public static function IsValidEmail($email)
 234         {
 235                 if (preg_match('#^[a-z0-9\.\-\+_]+?@(.*?\.)*?[a-z0-9\-_]+?\.[a-z]{2,4}$#i', $email))
 236                 {
 237                         return true;
 238                 }
 239                 else
 240                 {
 241                         return false;
 242                 }
 243         }
 244
 245         // ###################################################################
 246         /**
 247         * Check a browser's user agent against a pre-determined list
 248         *
 249         * @param        string  Browser name
 250         * @param        string  The browser's version
 251         *
 252         * @param        mixed   False if there is no match, the version if there is
 253         */
 254         public static function IsBrowser($check, $version = '')
 255         {
 256                 $useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
 257                 $browser = array();
 258                 $matches = array();
 259
 260                 // -------------------------------------------------------------------
 261                 // -- Opera
 262                 // -------------------------------------------------------------------
 263                 # Opera/6.05 (Windows 98; U) [en]
 264                 # Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 6.0 [en]
 265                 # Mozilla/5.0 (Windows 98; U) Opera 6.0 [en]
 266                 # Mozilla/4.0 (compatible; MSIE, 6.0; Windows 98) Opera 7.0 [en]
 267                 if (preg_match('#opera ([0-9\.]+)#', $useragent, $matches) !== false)
 268                 {
 269                         if (isset($matches[1]))
 270                         {
 271                                 $browser['opera'] = $matches[1];
 272                         }
 273                 }
 274
 275                 // -------------------------------------------------------------------
 276                 // -- Mac browser
 277                 // -------------------------------------------------------------------
 278                 if (strpos($useragent, 'mac') !== false)
 279                 {
 280                         $browser['mac'] = true;
 281                 }
 282
 283                 // -------------------------------------------------------------------
 284                 // -- Internet explorer
 285                 // -------------------------------------------------------------------
 286                 # Mozilla/4.0 (compatible; MSIE 6.0b; Windows NT 5.1; .NET CLR 1.0.2914)
 287                 # Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)
 288                 if (preg_match('#msie ([0-9\.]+)#', $useragent, $matches) !== false AND !isset($browser['opera']))
 289                 {
 290                         if (isset($matches[1]))
 291                         {
 292                                 $browser['ie'] = $matches[1];
 293                         }
 294                 }
 295
 296                 // -------------------------------------------------------------------
 297                 // -- Safari
 298                 // -------------------------------------------------------------------
 299                 # Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/125.4 (KHTML, like Gecko) Safari/125.9
 300                 if (preg_match('#safari/([0-9\.]+)#', $useragent, $matches) !== false)
 301                 {
 302                         if (isset($matches[1]))
 303                         {
 304                                 $browser['safari'] = $matches[1];
 305                         }
 306                 }
 307
 308                 // -------------------------------------------------------------------
 309                 // -- Konqueror
 310                 // -------------------------------------------------------------------
 311                 # Mozilla/5.0 (compatible; Konqueror/3)
 312                 # Mozilla/5.0 (compatible; Konqueror/3.1; i686 Linux; 20020628)
 313                 if (preg_match('#konqueror/([0-9\.]+)#', $useragent, $matches) !== false)
 314                 {
 315                         if (isset($matches[1]))
 316                         {
 317                                 $browser['konqueror'] = $matches[1];
 318                         }
 319                 }
 320
 321                 // -------------------------------------------------------------------
 322                 // -- Mozilla
 323                 // -------------------------------------------------------------------
 324                 # Mozilla/5.001 (windows; U; NT4.0; en-us) Gecko/25250101
 325                 # Mozilla/5.001 (Macintosh; N; PPC; ja) Gecko/25250101 MegaCorpBrowser/1.0 (MegaCorp, Inc.)
 326                 if (preg_match('#gecko/([0-9]+)#', $useragent, $matches) !== false AND !isset($browser['safari']))
 327                 {
 328                         if (isset($matches[1]))
 329                         {
 330                                 $browser['mozilla'] = $matches[1];
 331                         }
 332
 333                         // -------------------------------------------------------------------
 334                         // -- Firefox
 335                         // -------------------------------------------------------------------
 336                         # Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040628 Firefox/0.9.1
 337                         # Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4a) Gecko/20030423 Firebird Browser/0.6
 338                         if (preg_match('#(firebird|firefox)( browser)?/([0-9\.]+)#', $useragent, $matches) !== false)
 339                         {
 340                                 if (isset($matches[3]))
 341                                 {
 342                                         $browser['firefox'] = $matches[3];
 343                                 }
 344                         }
 345
 346                         // -------------------------------------------------------------------
 347                         // -- Netscape
 348                         // -------------------------------------------------------------------
 349                         # Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:0.9.4.1) Gecko/20020318 Netscape6/6.2.2
 350                         if (preg_match('#netscape([0-9].*?)?/([0-9\.]+)#', $useragent, $matches) !== false)
 351                         {
 352                                 if (isset($matches[2]))
 353                                 {
 354                                         $browser['netscape'] = $matches[2];
 355                                 }
 356                         }
 357
 358                         // -------------------------------------------------------------------
 359                         // -- Camino
 360                         // -------------------------------------------------------------------
 361                         # Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040623 Camino/0.8
 362                         if (preg_match('#camino/([0-9\.]+)#', $useragent, $matches) !== false)
 363                         {
 364                                 if (isset($matches[1]))
 365                                 {
 366                                         $browser['camino'] = $matches[1];
 367                                 }
 368                         }
 369                 }
 370
 371                 if (isset($browser["$check"]))
 372                 {
 373                         if ($version)
 374                         {
 375                                 if ($browser["$check"] >= $version)
 376                                 {
 377                                         return $browser["$check"];
 378                                 }
 379                                 else
 380                                 {
 381                                         return false;
 382                                 }
 383                         }
 384                         else
 385                         {
 386                                 return $browser["$check"];
 387                         }
 388                 }
 389                 else
 390                 {
 391                         return false;
 392                 }
 393         }
 394
 395         // ###################################################################
 396         /**
 397         * Generates a random string of random length (unless otherwise
 398         * specified)
 399         *
 400         * @param        integer Optional length
 401         *
 402         * @return       string  A random string
 403         */
 404         public static function Random($length = 0)
 405         {
 406                 // custom high and lows
 407                 if (is_array($length))
 408                 {
 409                         $length = rand($length[0], $length[1]);
 410                 }
 411                 else if (!$length)
 412                 {
 413                         // Gimme a length!
 414                         $length = rand(20, 65);
 415                 }
 416
 417                 // Number of ints in our salt
 418                 $intcount = rand(1, intval($length / 2));
 419
 420                 // Number of chars
 421                 $charcount = $length - $intcount;
 422
 423                 // Upper-case chars
 424                 $upperchars = rand(1, intval($charcount / 2));
 425
 426                 // Lower-case chars
 427                 $lowerchars = $charcount - $upperchars;
 428
 429                 // Generate ints
 430                 for ($i = 0; $i < $intcount; $i++)
 431                 {
 432                         $string[ mt_rand() ] = rand(0, 9);
 433                 }
 434
 435                 // Generate upper chars
 436                 for ($i = 0; $i < $upperchars; $i++)
 437                 {
 438                         $string[ mt_rand() ] = chr(rand(65, 90));
 439                 }
 440
 441                 // Generate lower chars
 442                 for ($i = 0; $i < $lowerchars; $i++)
 443                 {
 444                         $string[ mt_rand() ] = chr(rand(97, 122));
 445                 }
 446
 447                 if ($length != sizeof($string))
 448                 {
 449                         return $this->rand($length);
 450                 }
 451
 452                 // Sort the chars by thier random assignment
 453                 ksort($string);
 454
 455                 // Flatten the array
 456                 $return = '';
 457                 foreach ($string AS $char)
 458                 {
 459                         $return .= $char;
 460                 }
 461
 462                 return $return;
 463         }
 464
 465         // ###################################################################
 466         /**
 467         * Sets the current array position to be the specified key. This
 468         * function should be avoided on large arrays.
 469         *
 470         * @param        array   The array whose counter is to be updated
 471         * @param        mixed   The key of the element of the array that the counter is to be set to
 472         *
 473         * @return       mixed   Return the elelment of the array that we just put the counter to
 474         */
 475         public static function ArraySetCurrent(&$array, $key)
 476         {
 477                 reset($array);
 478                 while (current($array) !== false)
 479                 {
 480                         if (key($array) == $key)
 481                         {
 482                                 break;
 483                         }
 484                         next($array);
 485                 }
 486                 return current($array);
 487         }
 488
 489         // ###################################################################
 490         /**
 491         * Calculates the microtime difference by taking a given microtime and
 492         * subtracting it from the current one
 493         *
 494         * @param        string  The start microtime
 495         *
 496         * @return       float   Microtime difference
 497         */
 498         public static function FetchMicrotimeDiff($mtstart)
 499         {
 500                 $mtend = microtime();
 501                 list ($starttime['micro'], $starttime['sec']) = explode(' ', $mtstart);
 502                 list ($endtime['micro'], $endtime['sec']) = explode(' ', $mtend);
 503                 return ($endtime['micro'] + $endtime['sec']) - ($starttime['micro'] + $starttime['sec']);
 504         }
 505
 506         // ###################################################################
 507         /**
 508         * Fetches the extension of a file by extracting everything after the
 509         * last period
 510         *
 511         * @param        string  Filename
 512         *
 513         * @return       string  The extension for the specifid file name
 514         */
 515         public static function FetchExtension($filename)
 516         {
 517                 $array = explode('.', $filename);
 518
 519                 if (sizeof($array) == 1)
 520                 {
 521                         return '';
 522                 }
 523
 524                 return strval(end($array));
 525         }
 526
 527         // ###################################################################
 528         /**
 529         * Gets the maximum file size for attachment uploading, as specified by
 530         * PHP. If no value is present, 10 MB (represented in bytes) is
 531         * returned.
 532         *
 533         * @return       integer The maximum file upload size in bytes
 534         */
 535         public static function FetchMaxPhpFileSize()
 536         {
 537                 if ($size = @ini_get('upload_max_filesize'))
 538                 {
 539                         if (preg_match('#[^0-9].#', $size))
 540                         {
 541                                 return $size;
 542                         }
 543                         else
 544                         {
 545                                 return intval($size) * 1048576;
 546                         }
 547                 }
 548                 else
 549                 {
 550                         return 10 * 1048576;
 551                 }
 552         }
 553
 554         // ###################################################################
 555         /**
 556         * Scans a specified directory path and returns an array of all the
 557         * items in that directory. Directories found by this are end in a "/"
 558         *
 559         * @param        string  Path to scan
 560         * @param        bool    Whether or not to recursively scan the directories encountered
 561         * @param        bool    Ignore files beginning with a dot
 562         *
 563         * @return       array   A list of all the files in the specified path
 564         */
 565         public static function ScanDirectory($path, $recurse = true, $ignoreDot = true)
 566         {
 567                 return self::_helpScanDirectory($path, $recurse, $ignoreDot, '');
 568         }
 569
 570         // ###################################################################
 571         /**
 572         * Scans a specified directory path and returns an array of all the
 573         * items in that directory. Directories found by this are end in a "/"
 574         *
 575         * @param        string  Path to scan
 576         * @param        bool    Whether or not to recursively scan the directories encountered
 577         * @param        bool    Ignore files beginning with a dot
 578         * @param        string  Add to the beginning of the path
 579         *
 580         * @return       array   A list of all the files in the specified path
 581         */
 582         private static function _helpScanDirectory($path, $recurse = true, $ignoreDot = true, $pathAdd = '')
 583         {
 584                 $filelist = array();
 585                 $path = self::FetchSourcePath($path);
 586
 587                 $dir = new DirectoryIterator($path);
 588                 foreach ($dir AS $file)
 589                 {
 590                         $name = $file->getFilename();
 591                         if (($file->isDot() OR $name[0] == '.') AND $ignoreDot)
 592                         {
 593                                 continue;
 594                         }
 595
 596                         if ($file->isDir() AND $recurse)
 597                         {
 598                                 $filelist = array_merge($filelist, self::_helpScanDirectory($path . $name, $recurse, $ignoreDot, $pathAdd . BSFunctions::FetchSourcePath(str_replace($path, '', $file->getPathname()))));
 599                                 continue;
 600                         }
 601
 602                         $filelist[] = $pathAdd . $name;
 603                 }
 604
 605                 return $filelist;
 606         }
 607
 608         // ###################################################################
 609         /**
 610         * Changes line breaks into one format
 611         *
 612         * @param        string  Text
 613         * @param        string  New line break (default is UNIX \n format)
 614         *
 615         * @return       string  Text with one type of line break
 616         */
 617         public static function ConvertLineBreaks($text, $convert_to = "\n")
 618         {
 619                 $text = trim($text);
 620                 $text = str_replace(array("\r\n", "\r", "\n"), "\n", $text);
 621                 $text = str_replace("\n", $convert_to, $text);
 622                 return $text;
 623         }
 624
 625         // ###################################################################
 626         /**
 627         * Removes all empty() [by PHP's standards] elements in an array. This
 628         * can be used in place of using PREG_SPLIT_NO_EMPTY.
 629         *
 630         * @param        array   An array to strip empties from
 631         *
 632         * @return       array   Full-valued array
 633         */
 634         public static function ArrayStripEmpty($array)
 635         {
 636                 foreach ($array AS $key => $value)
 637                 {
 638                         if (is_array($array["$key"]))
 639                         {
 640                                 $array["$key"] = self::ArrayStripEmpty($array["$key"]);
 641                         }
 642                         else if (empty($value) OR is_null($value))
 643                         {
 644                                 unset($array["$key"]);
 645                         }
 646                 }
 647                 return $array;
 648         }
 649 }
 650
 651 /*=====================================================================*\
 652 || ###################################################################
 653 || # $HeadURL$
 654 || # $Id$
 655 || ###################################################################
 656 \*=====================================================================*/
 657 ?>