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php简单生成随机数的方法_PHP

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Release: 2016-05-30 08:47:32
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本文实例讲述了php简单生成随机数的方法。分享给大家供大家参考。具体如下:

<&#63;php
/**
 *生成随机数,可用户验证码
 *@param
 */
function randStr($m = 5) {
  $new_str = '';
  $str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwsyz0123456789';
  $max=strlen($str)-1;
  for ($i = 1; $i <= $m; ++$i) {
    $new_str .=$str[mt_rand(0, $max)];
  }
  return $new_str;
}
//测试
$str = randStr(6);
echo $str;

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希望本文所述对大家的php程序设计有所帮助。

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