字符串

Question

在调用HTTP API时，我得到一个整数字符串作为结果。 var_dump与下面的

相同

string '249139110' (length=12)

但是这个字符串有一些不可见的字符。我尝试了下面的代码

foreach (count_chars($id, 1) as $i => $val) {
   echo "<br>There were $val instance(s) of \"" , chr($i) , "\" in the string." . ord($i) . " : " .gettype($i) ;
}

以及我喜欢的结果

There were 1 instance(s) of "0" in the string.52 : integer
There were 3 instance(s) of "1" in the string.52 : integer
There were 1 instance(s) of "2" in the string.53 : integer
There were 1 instance(s) of "3" in the string.53 : integer
There were 1 instance(s) of "4" in the string.53 : integer
There were 2 instance(s) of "9" in the string.53 : integer
There were 1 instance(s) of "�" in the string.49 : integer
There were 1 instance(s) of "�" in the string.49 : integer
There were 1 instance(s) of "�" in the string.50 : integer

请帮我删除这些�字符。提前谢谢。

Answer 1

func fill(buffer: UnsafeMutableRawPointer!) -> Int { buffer[33] = 0 } 和FILTER_FLAG_STRIP_LOW|FILTER_FLAG_STRIP_HIGH将执行此操作尝试下面的代码

FILTER_UNSAFE_RAW

输出将是：

$unsafe='There were 1 instance(s) of "�" in the string.49 : integer';
$string = filter_var($unsafe, FILTER_UNSAFE_RAW, FILTER_FLAG_STRIP_LOW|FILTER_FLAG_STRIP_HIGH);
echo $string;

有关详细信息，请参阅：String sanitization through filter_var