微微工作室

当解码的string有BOM头的时候json_decode会解析失败，我们需先去除BOM头。函数如下：

function removeBOM($str = '')
{
 if (substr($str, 0,3) == pack("CCC",0xef,0xbb,0xbf)) {
 $str = substr($str, 3);
 }
 return $str;
}

其他方式：

$result = trim($str, "\xEF\xBB\xBF");
print_r(json_decode($str, true));
exit;

$result = @iconv("UTF-8", "GBK//IGNORE", $str);
$result = @iconv("GBK", "UTF-8//IGNORE", $str);

print_r(json_decode($str, true));
exit;