How to use reverse string to reverse Chinese in PHP

Reversing a string is the basic operation of a string. It is more commonly used to reverse numbers and English strings in a string. Chinese strings are rarely seen. This article will show you how to use the strrev() function to reverse a string.

Reverse English string:

<?php
$string = &#39;This is manoj&#39;;
$n =strlen("$string");
For($i=1;$i<=$n;$i++)
{
    $val= $string[-$i];
   echo $val;
}
echo "<br>";


echo strrev($string);
?>

Reverse Chinese string:

<?php  
header("content-type:text/html;charset=utf-8"); $str = "欢迎来到这里！"; function cnstrrev($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($arr));//以相反的元素顺序返回数组：
  }
  // 输出反转的字符串
  echo &#39;反转前：&#39;.$str.&#39;<br><br>反转后：&#39;.cnstrrev($str);

Output:

反转前：欢迎来到这里！反转后：！里这到来迎欢

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