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How to correctly use PHP random number class_PHP tutorial

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WBOYOriginal
2016-07-15 13:33:491073browse

PHP random number code example:

  1. < ?php  
  2. class getRandstrClass{   
  3. function getCode ($length = 32, $mode = 0) {   
  4. switch ($mode) {   
  5. case '1':   
  6. $str = '1234567890';   
  7. break;   
  8. case '2':   
  9. $str = 'abcdefghijklmnopqrstuvwxyz';   
  10. break;   
  11. case '3':   
  12. $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';   
  13. break;   
  14. case '4':   
  15. $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZa
    bcdefghijklmnopqrstuvwxyz'
    ;break;   
  16. case '5':   
  17. $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';   
  18. break;   
  19. case '6':   
  20. $str = 'abcdefghijklmnopqrstuvwxyz1234567890';   
  21. break;   
  22. default:   
  23. $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcde
    fghijklmnopqrstuvwxyz1234567890'
    ;   
  24. break;   
  25. }   
  26. $randString = '';   
  27. $len = strlen($str)-1;   
  28. for($i = 0;$i < $length;$i ++){   
  29. $num = mt_rand(0, $len);   
  30. $randString .= $str[$num];   
  31. }   
  32. return $randString ;   
  33. }   
  34. }   
  35. /* 使用方法   
  36. $code = new getRandstrClass();   
  37. $length = 4;   
  38. $mode = 0;   
  39. $str = $code->getCode($length, $mode);   
  40. echo $str;  
  41. $code = NULL;  
  42. */  
  43. ?>  

以上这段代码就是PHP随机数类的具体使用方法。


www.bkjia.comtruehttp://www.bkjia.com/PHPjc/446042.htmlTechArticlePHP随机数类代码示例: ?php classgetRandstrClass{ functiongetCode($ length = 32 ,$ mode = 0 ){ switch($mode){ case'1': $ str = '1234567890' ; break; case'2': $ str = 'abcde...
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