stream_get_filters()

(PHP 5, PHP 7)

获取已注册的数据流过滤器列表

说明

stream_get_filters(void): array

获取当前运行系统中已注册的数据流过滤器列表。

返回值

返回一个包含所有有效的数据流过滤器名字的索引数组。

范例

使用stream_get_filters()

<?php
$streamlist = stream_get_filters();
print_r($streamlist);
?>

以上例程的输出类似于：

Array (
  [0] => string.rot13
  [1] => string.toupper
  [2] => string.tolower
  [3] => string.base64
  [4] => string.quoted-printable
)

参见

• stream_filter_register()Register a user defined stream filter
• stream_get_wrappers() 获取已注册的流类型

Filters to be used within the convert filter are base64-encode, base64-decode, quoted-printable-encode and quoted-printable-decode. Note: those are not in the string filter, as currently reported by the manual!
Example usage is:
<?php
$h = fopen('gecodeerd.txt', 'r');
stream_filter_append($h, 'convert.base64-decode');
fpassthru($h);
fclose($h);
?>
Or
<?php
$filter = 'convert.base64-decode';
$file = 'coded.txt';
$h = fopen('php://filter/read=' . $filter . '/resource=' . $file,'r'); 
fpassthru($h);
fclose($h);
?>