php - Json - 无效的 UTF-8 序列

Question

我收到以下错误消息，但我不知道如何修复它：“PHP 警告：json_encode() [function.json-encode]: Invalid UTF-8 sequence”在这个 php 脚本中：

<?
$sth = mysql_query("SELECT *
  FROM produse_comenzi
  JOIN comenzi 
    ON comenzi.id_comanda = produse_comenzi.id_comanda
  JOIN (SELECT DISTINCT numar_factura, id_comanda FROM facturi) AS facturi
    ON facturi.id_comanda = comenzi.id_comanda
    AND comenzi.data >= '". $_GET['i'] ."' AND comenzi.data <= '". $_GET['d'] ."'
    JOIN produse ON produse.id_produs = produse_comenzi.id_produs");
$rows = array();
while($r = mysql_fetch_assoc($sth)) {
    $rows[] = $r;
}
print json_encode($rows);
?>

Answer 1

$rows[] = mb_check_encoding($r, 'UTF-8') ？$r : utf8_encode($r)

在打印语句之前尝试这个。