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php实现字符串翻转的方法,php字符串翻转

本文实例讲述了php实现字符串翻转的方法。分享给大家供大家参考。具体实现方法如下:

<&#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>";

希望本文所述对大家的php程序设计有所帮助。

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