How to convert ascii to string in php?

How to convert ascii to string in php: The default current php file environment is [UTF-8], if it is GBK, just omit [mb_convert_encoding], the code is [function asciitostr($sacii) 】.

How to convert ascii to string in php:

Convert string (supports Chinese) to ascii

Note: The default current php file environment is UTF-8. If it is GBK, mb_convert_encoding can be omitted.

function strtoascii($str){
$str=mb_convert_encoding($str,'GB2312');
$change_after='';
for($i=0;$i<strlen($str);$i++){
$temp_str=dechex(ord($str[$i]));
$change_after.=$temp_str[1].$temp_str[0];
}
return strtoupper($change_after);
}//strtoascii
function asciitostr($sacii){
$asc_arr= str_split(strtolower($sacii),2);
$str=&#39;&#39;;
for($i=0;$i<count($asc_arr);$i++){
$str.=chr(hexdec($asc_arr[$i][1].$asc_arr[$i][0]));
}
return mb_convert_encoding($str,&#39;UTF-8&#39;,&#39;GB2312&#39;);
}

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