Functions.php

   1 <?php
   2 /*=====================================================================*\
   3 || ###################################################################
   4 || # Blue Static ISSO Framework
   5 || # Copyright (c)2005-2008 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 2 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 (c)2005 - 2008, Blue Static
  36 * @package              ISSO
  37 *
  38 */
  39 class BSFunctions
  40 {
  41         /**
  42         * Singleton instance
  43         * @var  object
  44         */
  45         private static $instance;
  46
  47         /**
  48         * Cookie path
  49         * @var  string
  50         */
  51         private $cookiePath = '/';
  52
  53         /**
  54         * Cookie domain setting
  55         * @var  string
  56         */
  57         private $cookieDomain = '';
  58
  59         /**
  60         * Cookie expiration time
  61         * @var  integer
  62         */
  63         private $cookieTimeout = 900;
  64
  65         /**
  66         * Current swapped CSS class
  67         * @var  string
  68         */
  69         public static $cssClass = '';
  70
  71         // ###################################################################
  72         /**
  73         * Constructor
  74         */
  75         private function __construct() {}
  76
  77         // ###################################################################
  78         /**
  79         * Returns the shared instance for singleton
  80         *
  81         * @return       object  Shared instance
  82         */
  83         private function _instance()
  84         {
  85                 if (!self::$instance)
  86                 {
  87                         self::$instance = new BSFunctions();
  88                 }
  89                 return self::$instance;
  90         }
  91
  92         // ###################################################################
  93         /**
  94         * Sets the cookie path
  95         *
  96         * @param        string  New path
  97         */
  98         public static function set_cookie_path($path)
  99         {
 100                 self::_instance()->cookiePath = $path;
 101         }
 102
 103         // ###################################################################
 104         /**
 105         * Sets the cookie domain setting
 106         *
 107         * @param        string  Cookie domain
 108         */
 109         public static function set_cookie_domain($domain)
 110         {
 111                 self::_instance()->cookieDomain = $domain;
 112         }
 113
 114         // ###################################################################
 115         /**
 116         * Sets the cookie timeout
 117         *
 118         * @param        integer Cookie timeout
 119         */
 120         public static function set_cookie_timeout($timeout)
 121         {
 122                 self::_instance()->cookieTimeout = intval($timeout);
 123         }
 124
 125         // ###################################################################
 126         /**
 127         * Sets a cookie in the user's computer/browing session
 128         *
 129         * @param        string  Name of the cookie
 130         * @param        string  Value of the cookie, FALSE to clear
 131         * @param        bool    Is the cookie permanent?
 132         */
 133         public static function cookie($name, $value, $sticky = true)
 134         {
 135                 // expire the cookie
 136                 if ($value === false)
 137                 {
 138                         setcookie($name, $value, time() - (2 * self::_instance()->cookieTimeout), self::_instance()->cookiePath, self::_instance()->cookieDomain);
 139                 }
 140                 // set the cookie
 141                 else
 142                 {
 143                         if ($sticky)
 144                         {
 145                                 $expire = time() + 60 * 60 * 24 * 365;
 146                         }
 147                         else
 148                         {
 149                                 $expire = time() + self::_instance()->cookieTimeout;
 150                         }
 151
 152                         setcookie($name, $value, $expire, self::_instance()->cookiePath, self::_instance()->cookieDomain);
 153                 }
 154         }
 155
 156         // ###################################################################
 157         /**
 158         * Alternate between two CSS classes
 159         *
 160         * @param        string  First CSS class name
 161         * @param        string  Second CSS class name
 162         */
 163         public static function swap_css_classes($class1 = 'alt1', $class2 = 'alt2')
 164         {
 165                 static $count;
 166
 167                 self::$cssClass = ($count % 2) ? $class1 : $class2;
 168                 $count++;
 169         }
 170
 171         // ###################################################################
 172         /**
 173         * Returns the 'source path' version of a file path. It adds a
 174         * directory separator to the end of a string if it does not already
 175         * exist.
 176         *
 177         * @param        string  Path
 178         *
 179         * @return       string  Path with directory separator ending
 180         */
 181         public static function fetch_source_path($source)
 182         {
 183                 if (substr($source, strlen($source) - 1) != DIRECTORY_SEPARATOR)
 184                 {
 185                         $source .= DIRECTORY_SEPARATOR;
 186                 }
 187                 return $source;
 188         }
 189
 190         // ###################################################################
 191         /**
 192         * Force-download a file by sending application/octetstream
 193         *
 194         * @param        string  The text of the file to be streamed
 195         * @param        string  File name of the new file
 196         * @param        bool    Whether or not to die after stringeaming the file
 197         */
 198         public static function download_file($file, $name, $exit = true)
 199         {
 200                 if (self::is_browser('ie') || self::is_browser('opera') || self::is_browser('safari'))
 201                 {
 202                         $mime = 'application/octetstream';
 203                 }
 204                 else
 205                 {
 206                         $mime = 'application/octet-stream';
 207                 }
 208
 209                 header("Content-Type: $mime");
 210                 header('Expires: ' . gmdate('D, d M Y H:i:s') . ' GMT');
 211                 header('Content-Disposition: attachment; filename="' . $name . '"');
 212                 header('Content-length: ' . strlen($file));
 213                 header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
 214                 header('Pragma: public');
 215
 216                 print($file);
 217
 218                 if ($exit)
 219                 {
 220                         exit;
 221                 }
 222         }
 223
 224         // ###################################################################
 225         /**
 226         * Verify that an email address is valid via regex
 227         *
 228         * @param        string  An email address
 229         *
 230         * @return       bool    Validity of the email address
 231         */
 232         public static function is_valid_email($email)
 233         {
 234                 if (preg_match('#^[a-z0-9\.\-\+_]+?@(.*?\.)*?[a-z0-9\-_]+?\.[a-z]{2,4}$#i', $email))
 235                 {
 236                         return true;
 237                 }
 238                 else
 239                 {
 240                         return false;
 241                 }
 242         }
 243
 244         // ###################################################################
 245         /**
 246         * Check a browser's user agent against a pre-determined list
 247         *
 248         * @param        string  Browser name
 249         * @param        string  The browser's version
 250         *
 251         * @param        mixed   False if there is no match, the version if there is
 252         */
 253         public static function is_browser($check, $version = '')
 254         {
 255                 $useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
 256                 $browser = array();
 257                 $matches = array();
 258
 259                 // -------------------------------------------------------------------
 260                 // -- Opera
 261                 // -------------------------------------------------------------------
 262                 # Opera/6.05 (Windows 98; U) [en]
 263                 # Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 6.0 [en]
 264                 # Mozilla/5.0 (Windows 98; U) Opera 6.0 [en]
 265                 # Mozilla/4.0 (compatible; MSIE, 6.0; Windows 98) Opera 7.0 [en]
 266                 if (preg_match('#opera ([0-9\.]+)#', $useragent, $matches) !== false)
 267                 {
 268                         if (isset($matches[1]))
 269                         {
 270                                 $browser['opera'] = $matches[1];
 271                         }
 272                 }
 273
 274                 // -------------------------------------------------------------------
 275                 // -- Mac browser
 276                 // -------------------------------------------------------------------
 277                 if (strpos($useragent, 'mac') !== false)
 278                 {
 279                         $browser['mac'] = true;
 280                 }
 281
 282                 // -------------------------------------------------------------------
 283                 // -- Internet explorer
 284                 // -------------------------------------------------------------------
 285                 # Mozilla/4.0 (compatible; MSIE 6.0b; Windows NT 5.1; .NET CLR 1.0.2914)
 286                 # Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)
 287                 if (preg_match('#msie ([0-9\.]+)#', $useragent, $matches) !== false && !isset($browser['opera']))
 288                 {
 289                         if (isset($matches[1]))
 290                         {
 291                                 $browser['ie'] = $matches[1];
 292                         }
 293                 }
 294
 295                 // -------------------------------------------------------------------
 296                 // -- Safari
 297                 // -------------------------------------------------------------------
 298                 # Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/125.4 (KHTML, like Gecko) Safari/125.9
 299                 if (preg_match('#safari/([0-9\.]+)#', $useragent, $matches) !== false)
 300                 {
 301                         if (isset($matches[1]))
 302                         {
 303                                 $browser['safari'] = $matches[1];
 304                         }
 305                 }
 306
 307                 // -------------------------------------------------------------------
 308                 // -- Konqueror
 309                 // -------------------------------------------------------------------
 310                 # Mozilla/5.0 (compatible; Konqueror/3)
 311                 # Mozilla/5.0 (compatible; Konqueror/3.1; i686 Linux; 20020628)
 312                 if (preg_match('#konqueror/([0-9\.]+)#', $useragent, $matches) !== false)
 313                 {
 314                         if (isset($matches[1]))
 315                         {
 316                                 $browser['konqueror'] = $matches[1];
 317                         }
 318                 }
 319
 320                 // -------------------------------------------------------------------
 321                 // -- Mozilla
 322                 // -------------------------------------------------------------------
 323                 # Mozilla/5.001 (windows; U; NT4.0; en-us) Gecko/25250101
 324                 # Mozilla/5.001 (Macintosh; N; PPC; ja) Gecko/25250101 MegaCorpBrowser/1.0 (MegaCorp, Inc.)
 325                 if (preg_match('#gecko/([0-9]+)#', $useragent, $matches) !== false && !isset($browser['safari']))
 326                 {
 327                         if (isset($matches[1]))
 328                         {
 329                                 $browser['mozilla'] = $matches[1];
 330                         }
 331
 332                         // -------------------------------------------------------------------
 333                         // -- Firefox
 334                         // -------------------------------------------------------------------
 335                         # Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040628 Firefox/0.9.1
 336                         # Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4a) Gecko/20030423 Firebird Browser/0.6
 337                         if (preg_match('#(firebird|firefox)( browser)?/([0-9\.]+)#', $useragent, $matches) !== false)
 338                         {
 339                                 if (isset($matches[3]))
 340                                 {
 341                                         $browser['firefox'] = $matches[3];
 342                                 }
 343                         }
 344
 345                         // -------------------------------------------------------------------
 346                         // -- Netscape
 347                         // -------------------------------------------------------------------
 348                         # Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:0.9.4.1) Gecko/20020318 Netscape6/6.2.2
 349                         if (preg_match('#netscape([0-9].*?)?/([0-9\.]+)#', $useragent, $matches) !== false)
 350                         {
 351                                 if (isset($matches[2]))
 352                                 {
 353                                         $browser['netscape'] = $matches[2];
 354                                 }
 355                         }
 356
 357                         // -------------------------------------------------------------------
 358                         // -- Camino
 359                         // -------------------------------------------------------------------
 360                         # Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040623 Camino/0.8
 361                         if (preg_match('#camino/([0-9\.]+)#', $useragent, $matches) !== false)
 362                         {
 363                                 if (isset($matches[1]))
 364                                 {
 365                                         $browser['camino'] = $matches[1];
 366                                 }
 367                         }
 368                 }
 369
 370                 if (isset($browser["$check"]))
 371                 {
 372                         if ($version)
 373                         {
 374                                 if ($browser["$check"] >= $version)
 375                                 {
 376                                         return $browser["$check"];
 377                                 }
 378                                 else
 379                                 {
 380                                         return false;
 381                                 }
 382                         }
 383                         else
 384                         {
 385                                 return $browser["$check"];
 386                         }
 387                 }
 388                 else
 389                 {
 390                         return false;
 391                 }
 392         }
 393
 394         // ###################################################################
 395         /**
 396         * Generates a random string of random length (unless otherwise
 397         * specified)
 398         *
 399         * @param        integer Optional length
 400         *
 401         * @return       string  A random string
 402         */
 403         public static function random($length = 0)
 404         {
 405                 // custom high and lows
 406                 if (is_array($length))
 407                 {
 408                         $length = rand($length[0], $length[1]);
 409                 }
 410                 else if (!$length)
 411                 {
 412                         $length = rand(20, 65);
 413                 }
 414
 415                 $string = '';
 416                 while (strlen($string) < $length)
 417                 {
 418                         $type = rand(0, 300);
 419                         if ($type < 100)
 420                         {
 421                                 $string .= rand(0, 9);
 422                         }
 423                         else if ($type < 200)
 424                         {
 425                                 $string .= chr(rand(65, 90));
 426                         }
 427                         else
 428                         {
 429                                 $string .= chr(rand(97, 122));
 430                         }
 431                 }
 432
 433                 return $string;
 434         }
 435
 436         // ###################################################################
 437         /**
 438         * Sets the current array position to be the specified key. This
 439         * function should be avoided on large arrays.
 440         *
 441         * @param        array   The array whose counter is to be updated
 442         * @param        mixed   The key of the element of the array that the counter is to be set to
 443         *
 444         * @return       mixed   Return the elelment of the array that we just put the counter to
 445         */
 446         public static function array_set_current(&$array, $key)
 447         {
 448                 reset($array);
 449                 while (current($array) !== false)
 450                 {
 451                         if (key($array) == $key)
 452                         {
 453                                 break;
 454                         }
 455                         next($array);
 456                 }
 457                 return current($array);
 458         }
 459
 460         // ###################################################################
 461         /**
 462         * Calculates the microtime difference by taking a given microtime and
 463         * subtracting it from the current one
 464         *
 465         * @param        string  The start microtime
 466         *
 467         * @return       float   Microtime difference
 468         */
 469         public static function fetch_microtime_diff($mtstart)
 470         {
 471                 $mtend = microtime();
 472                 list($startMicro, $startSec) = explode(' ', $mtstart);
 473                 list($endMicro, $endSec) = explode(' ', $mtend);
 474                 return ($endMicro + $endSec) - ($startMicro + $startSec);
 475         }
 476
 477         // ###################################################################
 478         /**
 479         * Fetches the extension of a file by extracting everything after the
 480         * last period
 481         *
 482         * @param        string  Filename
 483         *
 484         * @return       string  The extension for the specifid file name
 485         */
 486         public static function fetch_extension($filename)
 487         {
 488                 $array = explode('.', $filename);
 489
 490                 if (sizeof($array) == 1)
 491                 {
 492                         return '';
 493                 }
 494
 495                 return strval(end($array));
 496         }
 497
 498         // ###################################################################
 499         /**
 500         * Gets the maximum file size for attachment uploading, as specified by
 501         * PHP. If no value is present, 10 MB (represented in bytes) is
 502         * returned.
 503         *
 504         * @return       integer The maximum file upload size in bytes
 505         */
 506         public static function fetch_max_php_file_size()
 507         {
 508                 if ($size = @ini_get('upload_max_filesize'))
 509                 {
 510                         if (preg_match('#[^0-9].#', $size))
 511                         {
 512                                 return $size;
 513                         }
 514                         else
 515                         {
 516                                 return intval($size) * 1048576;
 517                         }
 518                 }
 519                 else
 520                 {
 521                         return 10 * 1048576;
 522                 }
 523         }
 524
 525         // ###################################################################
 526         /**
 527         * Scans a specified directory path and returns an array of all the
 528         * items in that directory. Directories found by this are end in a "/"
 529         *
 530         * @param        string  Path to scan
 531         * @param        bool    Whether or not to recursively scan the directories encountered
 532         * @param        bool    Ignore files beginning with a dot
 533         *
 534         * @return       array   A list of all the files in the specified path
 535         */
 536         public static function scan_directory($path, $recurse = true, $ignoreDot = true)
 537         {
 538                 return self::_help_scan_directory($path, $recurse, $ignoreDot, '');
 539         }
 540
 541         // ###################################################################
 542         /**
 543         * Scans a specified directory path and returns an array of all the
 544         * items in that directory. Directories found by this are end in a "/"
 545         *
 546         * @param        string  Path to scan
 547         * @param        bool    Whether or not to recursively scan the directories encountered
 548         * @param        bool    Ignore files beginning with a dot
 549         * @param        string  Add to the beginning of the path
 550         *
 551         * @return       array   A list of all the files in the specified path
 552         */
 553         private static function _help_scan_directory($path, $recurse = true, $ignoreDot = true, $pathAdd = '')
 554         {
 555                 $filelist = array();
 556                 $path = self::fetch_source_path($path);
 557
 558                 $dir = new DirectoryIterator($path);
 559                 foreach ($dir as $file)
 560                 {
 561                         $name = $file->getFilename();
 562                         if (($file->isDot() || $name[0] == '.') && $ignoreDot)
 563                         {
 564                                 continue;
 565                         }
 566
 567                         if ($file->isDir() && $recurse)
 568                         {
 569                                 $filelist = array_merge($filelist, self::_help_scan_directory($path . $name, $recurse, $ignoreDot, $pathAdd . BSFunctions::fetch_source_path(str_replace($path, '', $file->getPathname()))));
 570                                 continue;
 571                         }
 572
 573                         $filelist[] = $pathAdd . $name;
 574                 }
 575
 576                 return $filelist;
 577         }
 578
 579         // ###################################################################
 580         /**
 581         * Changes line breaks into one format
 582         *
 583         * @param        string  Text
 584         * @param        string  New line break (default is UNIX \n format)
 585         *
 586         * @return       string  Text with one type of line break
 587         */
 588         public static function convert_line_breaks($text, $convert_to = "\n")
 589         {
 590                 $text = trim($text);
 591                 $text = str_replace(array("\r\n", "\r", "\n"), "\n", $text);
 592                 $text = str_replace("\n", $convert_to, $text);
 593                 return $text;
 594         }
 595
 596         // ###################################################################
 597         /**
 598         * Removes all empty() [by PHP's standards] elements in an array. This
 599         * can be used in place of using PREG_SPLIT_NO_EMPTY.
 600         *
 601         * @param        array   An array to strip empties from
 602         *
 603         * @return       array   Full-valued array
 604         */
 605         public static function array_strip_empty($array)
 606         {
 607                 foreach ($array as $key => $value)
 608                 {
 609                         if (is_array($array["$key"]))
 610                         {
 611                                 $array["$key"] = self::array_strip_empty($array["$key"]);
 612                         }
 613                         else if (empty($value) || is_null($value))
 614                         {
 615                                 unset($array["$key"]);
 616                         }
 617                 }
 618                 return $array;
 619         }
 620
 621         // ###################################################################
 622         /**
 623         * A backtrace formatter.
 624         *
 625         * This is very slightly modified from PEAR/PHP_Compat (PHP license)
 626         *
 627         * @author       Laurent Laville <pear@laurent-laville.org>
 628         * @author       Aidan Lister <aidan@php.net>
 629         *
 630         * @param        array   The backtrace from debug_backtrace() to format
 631         *
 632         * @return       string  Formatted output
 633         */
 634         public static function format_backtrace($backtrace)
 635         {
 636                 // Unset call to debug_print_backtrace
 637                 array_shift($backtrace);
 638                 if (empty($backtrace))
 639                 {
 640                         return '';
 641                 }
 642
 643                 // Iterate backtrace
 644                 $calls = array();
 645                 foreach ($backtrace as $i => $call)
 646                 {
 647                         if (!isset($call['file']))
 648                         {
 649                                 $call['file'] = '(null)';
 650                         }
 651                         if (!isset($call['line']))
 652                         {
 653                                 $call['line'] = '0';
 654                         }
 655                         $location = $call['file'] . ':' . $call['line'];
 656                         $function = (isset($call['class'])) ? $call['class'] . (isset($call['type']) ? $call['type'] : '.') . $call['function'] : $call['function'];
 657
 658                         $params = '';
 659                         if (isset($call['args']))
 660                         {
 661                                 $args = array();
 662                                 foreach ($call['args'] as $arg)
 663                                 {
 664                                         if (is_array($arg))
 665                                         {
 666                                                 $args[] = 'Array';
 667                                         }
 668                                         elseif (is_object($arg))
 669                                         {
 670                                                 $args[] = get_class($arg);
 671                                         }
 672                                         else
 673                                         {
 674                                                 $args[] = $arg;
 675                                         }
 676                                 }
 677                                 $params = implode(', ', $args);
 678                         }
 679
 680                         $calls[] = sprintf('#%d  %s(%s) called at [%s]', $i, $function, $params, $location);
 681                 }
 682
 683                 return implode("\n", $calls);
 684         }
 685
 686         // ###################################################################
 687         /**
 688         * A variation of PHP's substr() method that takes in the start
 689         * and end position of a string, rather than a start and length. This
 690         * mimics Java's String.substring() method.
 691         *
 692         * @param        string  The string
 693         * @param        integer Start position
 694         * @param        integer End position
 695         *
 696         * @return       string  Part of a string
 697         */
 698         public static function substring($string, $start, $end)
 699         {
 700                 return substr($string, $start, $end - $start);
 701         }
 702 }
 703
 704 ?>