php-src/ext/standard/tests/filters/filter_errors.inc

<?php

function filter_errors_skipif($needle) {
	$filters = stream_get_filters();
	foreach($filters as $filter) {
		if (fnmatch($filter, $needle)) return;
	}
	die("skip $needle not available");
}

function filter_errors_test($filter, $data) {

	echo "test filtering of buffered data\n";

	$stream = fopen('php://memory', 'wb+');

	fwrite($stream, b".\r\n$data");
	fseek($stream, 0, SEEK_SET);
	stream_get_line($stream, 8192, "\r\n");

	$f = stream_filter_append($stream, $filter);

	echo "test filtering of non buffered data\n";

	$stream = fopen('php://memory', 'wb+');

	fwrite($stream, b"$data");
	fseek($stream, 0, SEEK_SET);

	stream_get_line($stream, 8192, "\r\n");
	stream_get_contents($stream);

}