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str_rand()

Auteur: CelestialCelebi - 01 september 2004 - 19:25 - Gekeurd door: Dennisvb - Hits: 2988 - Aantal punten: 2.13 (4 stemmen)




Check uitleg? :x Hij maakt een willekeurige string van $iLength, met de parameters die jij opgeeft.

php code - Bekijk de code zonder highlighting - Klap code in 
  1. <?php
  2. echo str_rand(32, true, true, true); // MD5..
  3. echo str_rand(400, false, false, false); // error
  4. echo str_rand(0, true, true, false); // error
  5. echo str_rand(4000000, false, false, true); // alleen nummers
  6. ?>

Code:
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  1. <?php
  2. /*
  3. ***************************************************************************
  4. * Function str_rand(), used to generate a random string of the characters *
  5. * you specify, with a length of your choice.                              *
  6. * Copyright (C) 2004 The Celestial Celebi                                 *
  7. * This program is free software; you can redistribute it and/or modify it *
  8. * under the terms of the GNU General Public License as published by the   *
  9. * Free Software Foundation; either version 2 of the License, or (at your  *
  10. * option) any later version.                                              *
  11. * This program is distributed in the hope that it will be useful, but     *
  12. * WITHOUT ANY WARRANTY; without even the implied warranty of              *
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU       *
  14. * General Public License for more details.                                *
  15. * You should have received a copy of the GNU General Public License along *
  16. * with this program; if not, write to the Free Software Foundation, Inc., *
  17. * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.               *
  18. ***************************************************************************
  19. */
  20.  
  21. /*
  22. ***************************************************************************
  23. * @function: str_rand(): Returns a random string, created from the        *
  24. *  characters you specify.                                                *
  25. * @param $iLength (int): The length of the random string.                 *
  26. * @param $bUseLowercase (bool): Use lowercase characters in the string?   *
  27. * @param $bUseUppercase (bool): Use uppercase characters in the string?   *
  28. * @param $bUseNumbers (bool): Use numbers in the string?                  *
  29. * @return string: The random string of $iLength characters.               *
  30. *-------------------------------------------------------------------------*
  31. * @started on: 23 June 2004 at 20:00:00 by The Celestial Celebi.          *
  32. * @last edited on: 23 June 2004 at 20:01:43 by The Celestial Celebi.      *
  33. * @constructs used: array, if, for, return.                               *
  34. * @functions used: array_merge, count, rand, range.                       *
  35. ***************************************************************************
  36. */
  37.  
  38. function str_rand($iLength, $bUseLowercase, $bUseUppercase, $bUseNumbers)
  39. {
  40. 	if((!$bUseLowercase && !$bUseUppercase && !$bUseNumbers) || $iLength == 0)
  41. 	{
  42. 		trigger_error('Must use something to generate the string', E_USER_WARNING);
  43. 	}
  44. 	else
  45. 	{
  46. 		$aCharactersToChoose = array();
  47. 		if($bUseLowercase)
  48. 		{
  49. 			$aCharactersToChoose = array_merge($aCharactersToChoose, range('a', 'z'));
  50. 		}
  51. 		if($bUseUppercase)
  52. 		{
  53. 			$aCharactersToChoose = array_merge($aCharactersToChoose, range('A', 'Z'));
  54. 		}
  55. 		if($bUsenumbers)
  56. 		{
  57. 			$aCharactersToChoose = array_merge($aCharactersToChoose, range(0, 9));
  58. 		}
  59. 		$iNumCharacters = (count($aCharactersToChoose) - 1);
  60. 		$sRandomString = '';
  61. 		for($i = 0; $i <= $iLength; $i++)
  62. 		{
  63. 			$sRandomString .= $aCharactersToChoose[rand(0, $iNumCharacters)];
  64. 		}
  65. 		return $sRandomString;
  66. 	}
  67. }
  68. ?>
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