Solve the problem of strrev function flipping Chinese garbled in PHP

When you flip Chinese with strrve in PHP, garbled behavior occurs.

For example:

Header ("content-type:text/html; Charset=utf-8 "), Echo strrev (" Handling garbled problems using the Strrev () function ")." <br> ";

The result of the operation is:

鮗 copy 䄚 綗 protium) (verrts 翽 䆐 焤

The solution is to rewrite a cnstrrev function yourself.

Header ("content-type:text/html; Charset=utf-8 "), $str = ' handling garbled problem using Strrev () function '; function Cnstrrev ($str) {    $len = strlen ($STR);    for ($i = 0; $i < $len; $i + +)    {        $char = $str {0};        if (ord ($char) > 127)//ord () function takes the ASCII code of the first character, if it is greater than 0xa0 (127) then the Chinese character        {            $i +=2;//utf-8 encoding, a Chinese character is three bytes            if ($i < $len)            {                $arr [] = substr ($str, 0, 3);//utf-8 encoding, a Chinese character occupies three bytes                $str = substr ($str, 3);            }        }        else        {            $arr [] = $char;            $str = substr ($str, 1);//Otherwise non-Chinese, takes one character        }    }    return Join (Array_reverse ($arr));//returns an array in reverse order of elements:}echo $ Str. ' + '. Cnstrrev ($STR);

The result of the operation is:

Handling garbled problems when using the Strrev () function + the number of hours of confusion in the question (Verrts)