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How to implement event candidate lottery function in PHP

May 23, 2018 pm 05:12 PM

php Function lottery

This article mainly introduces the PHP implementation of the event candidate lottery function. Randomly select a specified number of people and list the names of the selected people in order. It has certain reference value. Interested friends can refer to it

The scenario introduced in this article is a lottery for event candidates. A specified number of people are selected through simple random selection, and the names of the selected people are listed in sequence. The sample code is as follows:

&lt;!DOCTYPE html&gt;
&lt;html&gt;
  &lt;head&gt;
    &lt;meta charset=&quot;UTF-8&quot;&gt;
    &lt;title&gt;活动人选&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;?php
  $lotterPeopleArr = array();
  $num = 8;
 
  for($i=0;$i&lt;$num;$i++){
    $lotterPeople = GetRandStr(1);
 
    while(in_array($lotterPeople, $lotterPeopleArr)){
      $lotterPeople = GetRandStr(1);
    }
 
    $lotterPeopleArr[$i] = $lotterPeople;
    echo &quot;抽中人：&quot;. $lotterPeopleArr[$i].&#39;&lt;br/&gt;&#39;;
  }
 
  // echo &#39;抽中人：&#39;. $lotterPeople;
 
 
 
  /**
   * 生成随机数
   * $type int 默认(字母&amp;&amp;数字) 1 纯字母 2.纯数字 3.英文单词
   */
   function GetRandStr($len=&#39;4&#39;,$type=&#39;3&#39;)
  {
 
 
    switch($type)
    {
      case &#39;1&#39;;
      $chars = array(
          &quot;a&quot;, &quot;b&quot;, &quot;c&quot;, &quot;d&quot;, &quot;e&quot;, &quot;f&quot;, &quot;g&quot;, &quot;h&quot;, &quot;i&quot;, &quot;j&quot;, &quot;k&quot;,
          &quot;l&quot;, &quot;m&quot;, &quot;n&quot;, &quot;o&quot;, &quot;p&quot;, &quot;q&quot;, &quot;r&quot;, &quot;s&quot;, &quot;t&quot;, &quot;u&quot;, &quot;v&quot;,
          &quot;w&quot;, &quot;x&quot;, &quot;y&quot;, &quot;z&quot;, &quot;A&quot;, &quot;B&quot;, &quot;C&quot;, &quot;D&quot;, &quot;E&quot;, &quot;F&quot;, &quot;G&quot;,
          &quot;H&quot;, &quot;I&quot;, &quot;J&quot;, &quot;K&quot;, &quot;L&quot;, &quot;M&quot;, &quot;N&quot;, &quot;O&quot;, &quot;P&quot;, &quot;Q&quot;, &quot;R&quot;,
          &quot;S&quot;, &quot;T&quot;, &quot;U&quot;, &quot;V&quot;, &quot;W&quot;, &quot;X&quot;, &quot;Y&quot;, &quot;Z&quot;
      );
      break;
      case &#39;2&#39;;
      $chars = array(
          &quot;0&quot;, &quot;1&quot;, &quot;2&quot;,
          &quot;3&quot;, &quot;4&quot;, &quot;5&quot;, &quot;6&quot;, &quot;7&quot;, &quot;8&quot;, &quot;9&quot;
      );
      break;
      case &#39;3&#39;;
      $chars = array(
          &quot;小华&quot;,&quot;小冠&quot;,&quot;小王&quot;,&quot;小吴&quot;,&quot;小朱&quot;,&quot;小何&quot;,&quot;小陈&quot;,&quot;小熊&quot;,&quot;小斌&quot;,&quot;小李&quot;,&quot;小春&quot;,&quot;小超&quot;,&quot;小张&quot;,&quot;小郭&quot;,&quot;小柯&quot;,&quot;小梁&quot;,&quot;小理&quot;,&quot;小龚&quot;,&quot;小杰&quot;,&quot;小余&quot;,&quot;小洪&quot;,&quot;小郑&quot;,&quot;小志&quot;,&quot;小潘&quot;,
      );
      break;
      default;
      $chars = array(
          &quot;a&quot;, &quot;b&quot;, &quot;c&quot;, &quot;d&quot;, &quot;e&quot;, &quot;f&quot;, &quot;g&quot;, &quot;h&quot;, &quot;i&quot;, &quot;j&quot;, &quot;k&quot;,
          &quot;l&quot;, &quot;m&quot;, &quot;n&quot;, &quot;o&quot;, &quot;p&quot;, &quot;q&quot;, &quot;r&quot;, &quot;s&quot;, &quot;t&quot;, &quot;u&quot;, &quot;v&quot;,
          &quot;w&quot;, &quot;x&quot;, &quot;y&quot;, &quot;z&quot;, &quot;A&quot;, &quot;B&quot;, &quot;C&quot;, &quot;D&quot;, &quot;E&quot;, &quot;F&quot;, &quot;G&quot;,
          &quot;H&quot;, &quot;I&quot;, &quot;J&quot;, &quot;K&quot;, &quot;L&quot;, &quot;M&quot;, &quot;N&quot;, &quot;O&quot;, &quot;P&quot;, &quot;Q&quot;, &quot;R&quot;,
          &quot;S&quot;, &quot;T&quot;, &quot;U&quot;, &quot;V&quot;, &quot;W&quot;, &quot;X&quot;, &quot;Y&quot;, &quot;Z&quot;, &quot;0&quot;, &quot;1&quot;, &quot;2&quot;,
          &quot;3&quot;, &quot;4&quot;, &quot;5&quot;, &quot;6&quot;, &quot;7&quot;, &quot;8&quot;, &quot;9&quot;
      );
      break;
    }
    $charsLen = count($chars) - 1;
    shuffle($chars);
    $output = &quot;&quot;;
    for ($i=0; $i&lt;$len; $i++)
    {
    $output .= $chars[mt_rand(0, $charsLen)];
    }
    return $output;
  }
  ?&gt;
  &lt;/body&gt;
&lt;/html&gt;

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