Fix call after close if multiple filters are attached

Author: bwoebi

ext/standard/tests/streams/stream_multi_filters_close.phpt

@@ -0,0 +1,56 @@
+--TEST--
+Check if multiple filters are closed correctly and never called again after close
+--FILE--
+<?php
+
+class FirstFilter extends php_user_filter {
+	public function filter($in, $out, &$consumed, $closing) {
+		static $closed = 0;
+
+		while ($bucket = stream_bucket_make_writeable($in)) {
+			stream_bucket_append($out, stream_bucket_new($this->stream, $bucket->data));
+		}
+
+		if ($closing) {
+			$closed++;
+		}
+
+		if ($closed > 0) {
+			var_dump($closed++);
+		}
+		return PSFS_PASS_ON;
+	}
+}
+
+class SecondFilter extends php_user_filter {
+	public function filter($in, $out, &$consumed, $closing) {
+		static $closed = 0;
+
+		while ($bucket = stream_bucket_make_writeable($in)) {
+			stream_bucket_append($out, stream_bucket_new($this->stream, $bucket->data));
+		}
+
+		if ($closing) {
+			$closed++;
+		}
+
+		if ($closed > 0) {
+			var_dump($closed++);
+		}
+		return PSFS_PASS_ON;
+	}
+}
+
+$r = fopen("php://stdout", "w+");
+stream_filter_register("first", "FirstFilter");
+stream_filter_register("second", "SecondFilter");
+$first = stream_filter_prepend($r, "first", STREAM_FILTER_WRITE, []);
+$second = stream_filter_prepend($r, "second", STREAM_FILTER_WRITE, []);
+fwrite($r, "test\n");
+stream_filter_remove($second);
+stream_filter_remove($first);
+?>
+--EXPECT--
+test
+int(1)
+int(1)

main/streams/filter.c

@@ -449,7 +449,7 @@ PHPAPI int _php_stream_filter_flush(php_stream_filter *filter, int finish TSRMLS
 	for(current = filter; current; current = current->next) {
 		php_stream_filter_status_t status;
 
-		status = filter->fops->filter(stream, filter, inp, outp, NULL, flags TSRMLS_CC);
+		status = filter->fops->filter(stream, current, inp, outp, NULL, flags TSRMLS_CC);
 		if (status == PSFS_FEED_ME) {
 			/* We've flushed the data far enough */
 			return SUCCESS;