3.12、Unicode解码

//方法一：
function unicode_decode($str) {
    //Unicode解码 linux UCS-2BE，windows UCS-2LE
    $t = preg_replace("#\\\u([0-9a-f]{4})#ie", "iconv('UCS-2BE', 'UTF-8', pack('H4', '\\1'))", $str);
    return $t;
}
//方法二：
function unicode_decode($name){
    $json = '{"str":"'.$name.'"}';
    $arr = json_decode($json,true);
    if(empty($arr)) return '';
    return $arr['str'];
}
$content = unicode_decode($_POST['content']);
echo $content ;