Detailed graphic and text explanation of the solution to the problem of flipping Chinese garbled characters using strrev in PHP

This article mainly introduces the solution to the problem of Chinese garbled characters using strrev in PHP. It traverses the string and sets the encoding format to solve the garbled code problem through a custom function. Friends in need can refer to the following

Examples of this article A solution to the problem of using strrev to flip Chinese garbled characters in PHP. Share it with everyone for your reference, the details are as follows:

When using strrve in PHP to flip Chinese, garbled characters will appear

For example:

header("Content-Type: text/html; charset=utf-8");
echo strrev("处理使用strrev()函数时的乱码问题")."<br>";

The running result is:

��鮗遠籹䄚綗氕潇�)(verrts��翽䆐焤�

The solution is to rewrite a cnstrrev yourself The function

header("Content-Type: text/html; charset=utf-8");
$str = '处理使用strrev()函数时的乱码问题';
function cnstrrev($str)
{
  $len = strlen($str);
  for($i = 0; $i < $len; $i++)
  {
    $char = $str{0};
    if(ord($char) > 127) //ord()函数取得第一个字符的ASCII码，如果大于0xa0(127)的话则是中文字符
    {
      $i+=2;//utf-8编码的情况下，一个中文字符占三个字节
      if($i < $len)
      {
        $arr[] = substr($str, 0, 3);//utf-8编码的情况下，一个中文字符占三个字节
        $str = substr($str, 3);
      }
    }
    else
    {
      $arr[] = $char;
      $str = substr($str, 1);//否则为非中文，占一个字符
    }
  }
  return join(array_reverse($arr));//以相反的元素顺序返回数组：
}
echo $str.&#39;+&#39;.cnstrrev($str);

runs and the result is:

处理使用strrev()函数时的乱码问题+题问码乱的时数函)(verrts用使理处

The above is the entire content of this article, I hope it will be helpful to everyone's study.

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