functions.php

   1 <?php
   2 /*=====================================================================*\
   3 || ###################################################################
   4 || # Iris Studios Shared Object Framework [#]issoversion[#]
   5 || # Copyright ©2002-[#]year[#] Iris Studios, Inc.
   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 * Globalized Functions
  24 * functions.php
  25 *
  26 * @package      ISSO
  27 */
  28
  29 /**
  30 * Globalized Functions
  31 *
  32 * This framework is a set of functions that are commonly used in most
  33 * applications.
  34 *
  35 * @author               Iris Studios, Inc.
  36 * @copyright    Copyright ©2002 - [#]year[#], Iris Studios, Inc.
  37 * @version              $Revision$
  38 * @package              ISSO
  39 *
  40 */
  41 class Functions
  42 {
  43         /**
  44         * Framework registry object
  45         * @var  object
  46         * @access       private
  47         */
  48         var $registry = null;
  49
  50         /**
  51         * The path that is used to set cookies
  52         * @var  string
  53         * @access       private
  54         */
  55         var $cookiepath = '/';
  56
  57         /**
  58         * The domain used for cookie setting
  59         * @var  string
  60         * @access       private
  61         */
  62         var $cookiedom = '';
  63
  64         /**
  65         * The time it takes for a cookie to expire
  66         * @var  integer
  67         * @access       private
  68         */
  69         var $cookieexp = 900;
  70
  71         /**
  72         * State of the current background colour during alternation
  73         * @var  string
  74         * @access       public
  75         */
  76         var $bgcolour = '';
  77
  78         /**
  79         * Fields array that is used in this module
  80         * @var  array
  81         * @access       private
  82         */
  83         var $fields = array(
  84                 'cookiepath'    => array(REQ_YES,       null,   true),
  85                 'cookiedom'             => array(REQ_YES,       null,   true),
  86                 'cookieexp'             => array(REQ_YES,       null,   true)
  87         );
  88
  89         // ###################################################################
  90         /**
  91         * Constructor
  92         */
  93         function __construct(&$registry)
  94         {
  95                 $this->registry =& $registry;
  96         }
  97
  98         // ###################################################################
  99         /**
 100         * (PHP 4) Constructor
 101         */
 102         function Functions(&$registry)
 103         {
 104                 $this->__construct($registry);
 105         }
 106
 107         // ###################################################################
 108         /**
 109         * Sets an ISSO field
 110         *
 111         * @access       public
 112         *
 113         * @param        string  Field name
 114         * @param        mixed   Value of the field
 115         */
 116         function set($name, $value)
 117         {
 118                 $this->registry->do_set($name, $value, 'functions');
 119         }
 120
 121         // ###################################################################
 122         /**
 123         * Gets an ISSO field
 124         *
 125         * @access       public
 126         *
 127         * @param        string  Field name
 128         *
 129         * @return       mixed   Value of the field
 130         */
 131         function get($fieldname)
 132         {
 133                 return $this->registry->do_get($fieldname, 'functions');
 134         }
 135
 136         // ###################################################################
 137         /**
 138         * Sets a cookie with a friendly interface
 139         *
 140         * @access       public
 141         *
 142         * @param        string  The name of the cookie
 143         * @param        string  Value of the cookie
 144         * @param        bool    Is the cookie permanent?
 145         */
 146         function cookie($name, $value = '', $sticky = true)
 147         {
 148                 $this->registry->check_isso_fields(get_class($this));
 149
 150                 // expire the cookie
 151                 if (!$value)
 152                 {
 153                         setcookie($name, $value, time() - (2 * $this->cookieexp), $this->cookiepath, $this->cookiedom);
 154                 }
 155                 // set the cookie
 156                 else
 157                 {
 158                         if ($sticky)
 159                         {
 160                                 $expire = time() + 60 * 60 * 24 * 365;
 161                         }
 162                         else
 163                         {
 164                                 $expire = time() + $this->cookieexp;
 165                         }
 166
 167                         setcookie($name, $value, $expire, $this->cookiepath, $this->cookiedom);
 168                 }
 169         }
 170
 171         // ###################################################################
 172         /**
 173         * Alternate between two background colours
 174         *
 175         * @access       public
 176         *
 177         * @param        string  First CSS class name
 178         * @param        string  Second CSS class name
 179         */
 180         function exec_swap_bg($class1 = 'alt1', $class2 = 'alt2')
 181         {
 182                 static $count;
 183
 184                 $this->bgcolour = ($count % 2) ? $class1 : $class2;
 185                 $count++;
 186         }
 187
 188         // ###################################################################
 189         /**
 190         * Force-download a file by sending application/octetstream
 191         *
 192         * @access       public
 193         *
 194         * @param        string  The text of the file to be streamed
 195         * @param        string  File name of the new file
 196         * @param        bool    Whether or not to die after stringeaming the file
 197         */
 198         function download_file($file, $name, $exit = true)
 199         {
 200                 if ($this->is_browser('ie') OR $this->is_browser('opera') OR $this->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         * @access       public
 229         *
 230         * @param        string  An email address
 231         *
 232         * @return       bool    Validity of the email address
 233         */
 234         function is_valid_email($email)
 235         {
 236                 if (preg_match('#^[a-z0-9\.\-\+_]+?@(.*?\.)*?[a-z0-9\-_]+?\.[a-z]{2,4}$#i', $email))
 237                 {
 238                         return true;
 239                 }
 240                 else
 241                 {
 242                         return false;
 243                 }
 244         }
 245
 246         // ###################################################################
 247         /**
 248         * Check a browser's user agent against a pre-determined list
 249         *
 250         * @access       public
 251         *
 252         * @param        string  Browser name
 253         * @param        string  The browser's version
 254         *
 255         * @param        mixed   False if there is no match, the version if there is
 256         */
 257         function is_browser($check, $version = '')
 258         {
 259                 $useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
 260                 $browser = array();
 261                 $matches = array();
 262
 263                 // -------------------------------------------------------------------
 264                 // -- Opera
 265                 // -------------------------------------------------------------------
 266                 # Opera/6.05 (Windows 98; U) [en]
 267                 # Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 6.0 [en]
 268                 # Mozilla/5.0 (Windows 98; U) Opera 6.0 [en]
 269                 # Mozilla/4.0 (compatible; MSIE, 6.0; Windows 98) Opera 7.0 [en]
 270                 if (preg_match('#opera ([0-9\.]+)#', $useragent, $matches) !== false)
 271                 {
 272                         if (isset($matches[1]))
 273                         {
 274                                 $browser['opera'] = $matches[1];
 275                         }
 276                 }
 277
 278                 // -------------------------------------------------------------------
 279                 // -- Mac browser
 280                 // -------------------------------------------------------------------
 281                 if (strpos($useragent, 'mac') !== false)
 282                 {
 283                         $browser['mac'] = true;
 284                 }
 285
 286                 // -------------------------------------------------------------------
 287                 // -- Internet explorer
 288                 // -------------------------------------------------------------------
 289                 # Mozilla/4.0 (compatible; MSIE 6.0b; Windows NT 5.1; .NET CLR 1.0.2914)
 290                 # Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)
 291                 if (preg_match('#msie ([0-9\.]+)#', $useragent, $matches) !== false AND !isset($browser['opera']))
 292                 {
 293                         if (isset($matches[1]))
 294                         {
 295                                 $browser['ie'] = $matches[1];
 296                         }
 297                 }
 298
 299                 // -------------------------------------------------------------------
 300                 // -- Safari
 301                 // -------------------------------------------------------------------
 302                 # Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/125.4 (KHTML, like Gecko) Safari/125.9
 303                 if (preg_match('#safari/([0-9\.]+)#', $useragent, $matches) !== false)
 304                 {
 305                         if (isset($matches[1]))
 306                         {
 307                                 $browser['safari'] = $matches[1];
 308                         }
 309                 }
 310
 311                 // -------------------------------------------------------------------
 312                 // -- Konqueror
 313                 // -------------------------------------------------------------------
 314                 # Mozilla/5.0 (compatible; Konqueror/3)
 315                 # Mozilla/5.0 (compatible; Konqueror/3.1; i686 Linux; 20020628)
 316                 if (preg_match('#konqueror/([0-9\.]+)#', $useragent, $matches) !== false)
 317                 {
 318                         if (isset($matches[1]))
 319                         {
 320                                 $browser['konqueror'] = $matches[1];
 321                         }
 322                 }
 323
 324                 // -------------------------------------------------------------------
 325                 // -- Mozilla
 326                 // -------------------------------------------------------------------
 327                 # Mozilla/5.001 (windows; U; NT4.0; en-us) Gecko/25250101
 328                 # Mozilla/5.001 (Macintosh; N; PPC; ja) Gecko/25250101 MegaCorpBrowser/1.0 (MegaCorp, Inc.)
 329                 if (preg_match('#gecko/([0-9]+)#', $useragent, $matches) !== false AND !isset($browser['safari']))
 330                 {
 331                         if (isset($matches[1]))
 332                         {
 333                                 $browser['mozilla'] = $matches[1];
 334                         }
 335
 336                         // -------------------------------------------------------------------
 337                         // -- Firefox
 338                         // -------------------------------------------------------------------
 339                         # Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040628 Firefox/0.9.1
 340                         # Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4a) Gecko/20030423 Firebird Browser/0.6
 341                         if (preg_match('#(firebird|firefox)( browser)?/([0-9\.]+)#', $useragent, $matches) !== false)
 342                         {
 343                                 if (isset($matches[3]))
 344                                 {
 345                                         $browser['firefox'] = $matches[3];
 346                                 }
 347                         }
 348
 349                         // -------------------------------------------------------------------
 350                         // -- Netscape
 351                         // -------------------------------------------------------------------
 352                         # Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:0.9.4.1) Gecko/20020318 Netscape6/6.2.2
 353                         if (preg_match('#netscape([0-9].*?)?/([0-9\.]+)#', $useragent, $matches) !== false)
 354                         {
 355                                 if (isset($matches[2]))
 356                                 {
 357                                         $browser['netscape'] = $matches[2];
 358                                 }
 359                         }
 360
 361                         // -------------------------------------------------------------------
 362                         // -- Camino
 363                         // -------------------------------------------------------------------
 364                         # Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040623 Camino/0.8
 365                         if (preg_match('#camino/([0-9\.]+)#', $useragent, $matches) !== false)
 366                         {
 367                                 if (isset($matches[1]))
 368                                 {
 369                                         $browser['camino'] = $matches[1];
 370                                 }
 371                         }
 372                 }
 373
 374                 if (isset($browser["$check"]))
 375                 {
 376                         if ($version)
 377                         {
 378                                 if ($browser["$check"] >= $version)
 379                                 {
 380                                         return $browser["$check"];
 381                                 }
 382                                 else
 383                                 {
 384                                         return false;
 385                                 }
 386                         }
 387                         else
 388                         {
 389                                 return $browser["$check"];
 390                         }
 391                 }
 392                 else
 393                 {
 394                         return false;
 395                 }
 396         }
 397
 398         // ###################################################################
 399         /**
 400         * Generates a random string of random length (unless otherwise
 401         * specified)
 402         *
 403         * @access       public
 404         *
 405         * @param        integer Optional length
 406         *
 407         * @return       string  A random string
 408         */
 409         function rand($length = 0)
 410         {
 411                 // custom high and lows
 412                 if (is_array($length))
 413                 {
 414                         $length = rand($length[0], $length[1]);
 415                 }
 416                 else if (!$length)
 417                 {
 418                         // Gimme a length!
 419                         $length = rand(20, 65);
 420                 }
 421
 422                 // Number of ints in our salt
 423                 $intcount = rand(1, intval($length / 2));
 424
 425                 // Number of chars
 426                 $charcount = $length - $intcount;
 427
 428                 // Upper-case chars
 429                 $upperchars = rand(1, intval($charcount / 2));
 430
 431                 // Lower-case chars
 432                 $lowerchars = $charcount - $upperchars;
 433
 434                 // Generate ints
 435                 for ($i = 0; $i < $intcount; $i++)
 436                 {
 437                         $string[ mt_rand() ] = rand(0, 9);
 438                 }
 439
 440                 // Generate upper chars
 441                 for ($i = 0; $i < $upperchars; $i++)
 442                 {
 443                         $string[ mt_rand() ] = chr(rand(65, 90));
 444                 }
 445
 446                 // Generate lower chars
 447                 for ($i = 0; $i < $lowerchars; $i++)
 448                 {
 449                         $string[ mt_rand() ] = chr(rand(97, 122));
 450                 }
 451
 452                 if ($length != sizeof($string))
 453                 {
 454                         return $this->rand($length);
 455                 }
 456
 457                 // Sort the chars by thier random assignment
 458                 ksort($string);
 459
 460                 // Flatten the array
 461                 $return = '';
 462                 foreach ($string AS $char)
 463                 {
 464                         $return .= $char;
 465                 }
 466
 467                 return $return;
 468         }
 469
 470         // ###################################################################
 471         /**
 472         * Sets the current array position to be the specified key. This
 473         * function should be avoided on large arrays.
 474         *
 475         * @access       public
 476         *
 477         * @param        array   The array whose counter is to be updated
 478         * @param        mixed   The key of the element of the array that the counter is to be set to
 479         *
 480         * @return       mixed   Return the elelment of the array that we just put the counter to
 481         */
 482         function array_set_current(&$array, $key)
 483         {
 484                 reset($array);
 485                 while (current($array) !== false)
 486                 {
 487                         if (key($array) == $key)
 488                         {
 489                                 break;
 490                         }
 491                         next($array);
 492                 }
 493                 return current($array);
 494         }
 495
 496         // ###################################################################
 497         /**
 498         * Calculates the microtime difference by taking a given microtime and
 499         * subtracting it from the current one
 500         *
 501         * @access       public
 502         *
 503         * @param        string  The start microtime
 504         *
 505         * @return       float   Microtime difference
 506         */
 507         function fetch_microtime_diff($mtstart)
 508         {
 509                 $mtend = microtime();
 510                 list ($starttime['micro'], $starttime['sec']) = explode(' ', $mtstart);
 511                 list ($endtime['micro'], $endtime['sec']) = explode(' ', $mtend);
 512                 return ($endtime['micro'] + $endtime['sec']) - ($starttime['micro'] + $starttime['sec']);
 513         }
 514
 515         // ###################################################################
 516         /**
 517         * Fetches the extension of a file by extracting everything after the
 518         * last period
 519         *
 520         * @access       public
 521         *
 522         * @param        string  Filename
 523         *
 524         * @return       string  The extension for the specifid file name
 525         */
 526         function fetch_extension($filename)
 527         {
 528                 return strval(end(explode('.', $filename)));
 529         }
 530
 531         // ###################################################################
 532         /**
 533         * Gets the maximum file size for attachment uploading, as specified by
 534         * PHP. If no value is present, 10 MB (represented in bytes) is
 535         * returned.
 536         *
 537         * @access       public
 538         *
 539         * @return       integer The maximum file upload size in bytes
 540         */
 541         function fetch_max_attachment_size()
 542         {
 543                 if ($size = @ini_get('upload_max_filesize'))
 544                 {
 545                         if (preg_match('#[^0-9].#', $size))
 546                         {
 547                                 return $size;
 548                         }
 549                         else
 550                         {
 551                                 return intval($size) * 1048576;
 552                         }
 553                 }
 554                 else
 555                 {
 556                         return 10 * 1048576;
 557                 }
 558         }
 559
 560         // ###################################################################
 561         /**
 562         * Scans a specified directory path and returns an array of all the
 563         * items in that directory. Directories found by this are end in a "/"
 564         *
 565         * @access       public
 566         *
 567         * @param        string  Path to scan
 568         * @param        bool    Whether or not to recursively scan the directories encountered
 569         * @param        bool    Ignore files beginning with a dot
 570         * @param        bool    Ignore 'CVS' dirctories
 571         *
 572         * @return       array   A list of all the files in the specified path
 573         */
 574         function scandir($path, $recurse = true, $ignoredot = true, $ignorecvs = true, $basepath = '', $unset = 1)
 575         {
 576                 static $filelist;
 577
 578                 if ($unset)
 579                 {
 580                         $filelist = array();
 581                 }
 582
 583                 if (substr($path, (strlen($path) - 1), 1) != '/')
 584                 {
 585                         $path .= '/';
 586                 }
 587
 588                 if ($handle = opendir($path))
 589                 {
 590                         while (($file = readdir($handle)) !== false)
 591                         {
 592                                 $isdot = ((substr($file, 0, 1) == '.') ? true : false);
 593                                 $isdot = (($ignoredot) ? $isdot : true);
 594                                 $iscvs = (($file == 'CVS') ? true : false);
 595                                 $iscvs = (($ignorecvs) ? $iscvs : true);
 596                                 if (!$isdot AND !$iscvs)
 597                                 {
 598                                         if (is_dir($path . $file))
 599                                         {
 600                                                 $filelist["$basepath"][] = "$file/";
 601                                                 if ($recurse)
 602                                                 {
 603                                                         $this->scandir("$path$file", true, $ignoredot, $ignorecvs, "$basepath$file/", 0);
 604                                                 }
 605                                         }
 606                                         else
 607                                         {
 608                                                 $filelist["$basepath"][] = $file;
 609                                         }
 610                                 }
 611                         }
 612                         closedir($handle);
 613                 }
 614                 return $filelist;
 615         }
 616
 617         // ###################################################################
 618         /**
 619         * Changes line breaks into one format
 620         *
 621         * @access       public
 622         *
 623         * @param        string  Text
 624         * @param        string  New line break (default is UNIX format)
 625         *
 626         * @return       string  Text with one type of line break
 627         */
 628         function convert_line_breaks($text, $convert_to = "\n")
 629         {
 630                 $text = trim($text);
 631                 $text = str_replace(array("\r\n", "\r", "\n"), "\n", $text);
 632                 $text = str_replace("\n", $convert_to, $text);
 633                 return $text;
 634         }
 635 }
 636
 637 /*=====================================================================*\
 638 || ###################################################################
 639 || # $HeadURL$
 640 || # $Id$
 641 || ###################################################################
 642 \*=====================================================================*/
 643 ?>