stream_filter_remove

Function name: stream_filter_remove()

Applicable version: PHP 4 >= 4.3.0, PHP 5, PHP 7

Function Description: The stream_filter_remove() function is used to remove a filter from the specified stream.

Syntax: bool stream_filter_remove(resource $stream_filter)

parameter:

• $stream_filter: The filter resource to be removed.

Return value: Return true if the filter is successfully removed; otherwise return false.

Example:

 // 创建一个过滤器class MyFilter extends php_user_filter { public function filter($in, $out, &$consumed, $closing) { while ($bucket = stream_bucket_make_writeable($in)) { $bucket->data = strtoupper($bucket->data); $consumed += $bucket->datalen; stream_bucket_append($out, $bucket); } return PSFS_PASS_ON; } } // 打开文件流$handle = fopen('input.txt', 'r'); // 添加过滤器stream_filter_append($handle, 'MyFilter'); // 读取并输出文件内容while (!feof($handle)) { echo fgets($handle); } // 移除过滤器stream_filter_remove($handle); // 关闭文件流fclose($handle);

In the example above, we first create a custom filter called MyFilter that converts characters from the input stream to uppercase. We then open a file stream and attach the MyFilter filter to the stream using the stream_filter_append() function. Then we use the fgets() function to read and output the file content, which will trigger the filter() method of MyFilter to process the data. Finally, we use the stream_filter_remove() function to remove the MyFilter filter and close the file stream.

Note that after removing the filter, the flow will no longer be affected by the filter.