How to implement string flipping in php, php string flipping_PHP tutorial

How to implement string flipping in php, php string flipping

The example in this article describes how to implement string flipping in php. Share it with everyone for your reference. The specific implementation method is as follows:

<&#63;php
header("content-type:text/html;charset=utf-8");
 /**
此函数的作用是反转中文字符串
mb_strlen() 获取字符的长度
mb_substr() 获取字符的单个元素
krsort() 按照键值逆序排序数组
implode() 将数组拼接为字符串
explode() 使用字符串分隔字符串
 */
function str_rev_gb($str){
  //判断输入的是不是utf8类型的字符，否则退出
  if(!is_string($str)||!mb_check_encoding($str,'UTF-8')){
    exit("输入类型不是UTF8类型的字符串");
  }
  $array=array();
  //将字符串存入数组
  $l=mb_strlen($str,'UTF-8');
  for($i=0;$i<$l;$i++){
    $array[]=mb_substr($str,$i,1,'UTF-8');
  }
  //反转字符串
  krsort($array);
  //拼接字符串
  $string=implode($array);
  return $string;
}
$str1 = "Englist";
$str2 = "English中国";
$str3 = "Eng中lish国";
$str4 = "中华人民共和国";
echo $str1."->".str_rev_gb($str1)."<br>";
echo $str2."->".str_rev_gb($str2)."<br>";
echo $str3."->".str_rev_gb($str3)."<br>";
echo $str4."->".str_rev_gb($str4)."<br>";

I hope this article will be helpful to everyone’s PHP programming design.

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