diff --git a/ext/standard/filestat.c b/ext/standard/filestat.c
index 1d83dcfe940df..9b8ff7efd6a66 100644
--- a/ext/standard/filestat.c
+++ b/ext/standard/filestat.c
@@ -388,6 +388,9 @@ static void php_do_chgrp(INTERNAL_FUNCTION_PARAMETERS, int do_lchgrp) /* {{{ */
 		php_error_docref(NULL, E_WARNING, "%s", strerror(errno));
 		RETURN_FALSE;
 	}
+
+	php_clear_stat_cache(0, NULL, 0);
+
 	RETURN_TRUE;
 #endif
 }
@@ -527,6 +530,9 @@ static void php_do_chown(INTERNAL_FUNCTION_PARAMETERS, int do_lchown) /* {{{ */
 		php_error_docref(NULL, E_WARNING, "%s", strerror(errno));
 		RETURN_FALSE;
 	}
+
+	php_clear_stat_cache(0, NULL, 0);
+
 	RETURN_TRUE;
 #endif
 }
@@ -591,6 +597,9 @@ PHP_FUNCTION(chmod)
 		php_error_docref(NULL, E_WARNING, "%s", strerror(errno));
 		RETURN_FALSE;
 	}
+
+	php_clear_stat_cache(0, NULL, 0);
+
 	RETURN_TRUE;
 }
 /* }}} */
@@ -676,6 +685,9 @@ PHP_FUNCTION(touch)
 		php_error_docref(NULL, E_WARNING, "Utime failed: %s", strerror(errno));
 		RETURN_FALSE;
 	}
+
+	php_clear_stat_cache(0, NULL, 0);
+
 	RETURN_TRUE;
 }
 /* }}} */
diff --git a/ext/standard/tests/file/bug72666_variation1.phpt b/ext/standard/tests/file/bug72666_variation1.phpt
new file mode 100644
index 0000000000000..6e59405d14ca8
--- /dev/null
+++ b/ext/standard/tests/file/bug72666_variation1.phpt
@@ -0,0 +1,19 @@
+--TEST--
+Bug #72666 (stat cache clearing inconsistent - touch)
+--FILE--
+<?php
+$filename = __DIR__ . '/bug72666_variation1.txt';
+
+touch($filename);
+var_dump(filemtime($filename) > 2);
+touch($filename, 1);
+var_dump(filemtime($filename));
+
+?>
+--CLEAN--
+<?php
+unlink(__DIR__ . '/bug72666_variation1.txt');
+?>
+--EXPECT--
+bool(true)
+int(1)
diff --git a/ext/standard/tests/file/bug72666_variation2.phpt b/ext/standard/tests/file/bug72666_variation2.phpt
new file mode 100644
index 0000000000000..7621133c71b24
--- /dev/null
+++ b/ext/standard/tests/file/bug72666_variation2.phpt
@@ -0,0 +1,35 @@
+--TEST--
+Bug #72666 (stat cache clearing inconsistent - chgrp, chmod)
+--SKIPIF--
+<?php
+if (substr(PHP_OS, 0, 3) == 'WIN') die('skip no windows support');
+if (!function_exists("posix_getgid")) die("skip no posix_getgid()");
+?>
+--FILE--
+<?php
+$filename = __DIR__ . '/bug72666_variation2.txt';
+
+$gid = posix_getgid();
+
+var_dump(touch($filename));
+$ctime1 = filectime($filename);
+sleep(1);
+var_dump(chgrp($filename,$gid));
+$ctime2 = filectime($filename);
+sleep(1);
+var_dump(chmod($filename, 0777));
+$ctime3 = filectime($filename);
+
+var_dump($ctime2 > $ctime1);
+var_dump($ctime3 > $ctime2);
+?>
+--CLEAN--
+<?php
+unlink(__DIR__ . '/bug72666_variation2.txt');
+?>
+--EXPECT--
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
diff --git a/ext/standard/tests/file/bug72666_variation3.phpt b/ext/standard/tests/file/bug72666_variation3.phpt
new file mode 100644
index 0000000000000..a491640c4f746
--- /dev/null
+++ b/ext/standard/tests/file/bug72666_variation3.phpt
@@ -0,0 +1,35 @@
+--TEST--
+Bug #72666 (stat cache clearing inconsistent - plain wrapper)
+--FILE--
+<?php
+$filename = __DIR__ . '/bug72666_variation3.txt';
+
+file_put_contents($filename, "test");
+$fd = fopen($filename, "r");
+$atime1 = fileatime($filename);
+sleep(1);
+var_dump(fread($fd, 4));
+$atime2 = fileatime($filename);
+$mtime1 = filemtime($filename);
+fclose($fd);
+$fd = fopen($filename, "w");
+sleep(1);
+var_dump(fwrite($fd, "data"));
+$mtime2 = filemtime($filename);
+if (substr(PHP_OS, 0, 3) == 'WIN') {
+    // Windows do not hundle atime
+    var_dump($atime2 == $atime1);
+} else {
+    var_dump($atime2 > $atime1);
+}
+var_dump($mtime2 > $mtime1);
+?>
+--CLEAN--
+<?php
+unlink(__DIR__ . '/bug72666_variation3.txt');
+?>
+--EXPECT--
+string(4) "test"
+int(4)
+bool(true)
+bool(true)
diff --git a/ext/standard/tests/file/bug72666_variation4.phpt b/ext/standard/tests/file/bug72666_variation4.phpt
new file mode 100644
index 0000000000000..09e32dafed9cf
--- /dev/null
+++ b/ext/standard/tests/file/bug72666_variation4.phpt
@@ -0,0 +1,26 @@
+--TEST--
+Bug #72666 (stat cache clearing inconsistent - exec)
+--FILE--
+<?php
+$filename = __DIR__ . '/bug72666_variation4.txt';
+
+touch($filename, 1);
+var_dump(filemtime($filename));
+exec("touch $filename");
+var_dump(filemtime($filename) > 1);
+
+
+touch($filename, 1);
+var_dump(filemtime($filename));
+shell_exec("touch $filename");
+var_dump(filemtime($filename) > 1);
+?>
+--CLEAN--
+<?php
+unlink(__DIR__ . '/bug72666_variation4.txt');
+?>
+--EXPECT--
+int(1)
+bool(true)
+int(1)
+bool(true)
diff --git a/main/streams/plain_wrapper.c b/main/streams/plain_wrapper.c
index 83a1b9fed49d5..1d5b7cfdac40d 100644
--- a/main/streams/plain_wrapper.c
+++ b/main/streams/plain_wrapper.c
@@ -349,14 +349,15 @@ PHPAPI php_stream *_php_stream_fopen_from_pipe(FILE *file, const char *mode STRE
 static ssize_t php_stdiop_write(php_stream *stream, const char *buf, size_t count)
 {
 	php_stdio_stream_data *data = (php_stdio_stream_data*)stream->abstract;
+	ssize_t bytes_written;
 
 	assert(data != NULL);
 
 	if (data->fd >= 0) {
 #ifdef PHP_WIN32
-		ssize_t bytes_written = _write(data->fd, buf, PLAIN_WRAP_BUF_SIZE(count));
+		bytes_written = _write(data->fd, buf, PLAIN_WRAP_BUF_SIZE(count));
 #else
-		ssize_t bytes_written = write(data->fd, buf, count);
+		bytes_written = write(data->fd, buf, count);
 #endif
 		if (bytes_written < 0) {
 			if (PHP_IS_TRANSIENT_ERROR(errno)) {
@@ -370,7 +371,6 @@ static ssize_t php_stdiop_write(php_stream *stream, const char *buf, size_t coun
 				php_error_docref(NULL, E_NOTICE, "Write of %zu bytes failed with errno=%d %s", count, errno, strerror(errno));
 			}
 		}
-		return bytes_written;
 	} else {
 
 #ifdef HAVE_FLUSHIO
@@ -380,8 +380,15 @@ static ssize_t php_stdiop_write(php_stream *stream, const char *buf, size_t coun
 		data->last_op = 'w';
 #endif
 
-		return (ssize_t) fwrite(buf, 1, count, data->file);
+		bytes_written = (ssize_t) fwrite(buf, 1, count, data->file);
 	}
+
+	if (EG(active)) {
+		/* clear stat cache as mtime and ctime got changed */
+		php_clear_stat_cache(0, NULL, 0);
+	}
+
+	return bytes_written;
 }
 
 static ssize_t php_stdiop_read(php_stream *stream, char *buf, size_t count)
@@ -460,6 +467,12 @@ static ssize_t php_stdiop_read(php_stream *stream, char *buf, size_t count)
 
 		stream->eof = feof(data->file);
 	}
+
+	if (EG(active)) {
+		/* clear stat cache as atime got changed */
+		php_clear_stat_cache(0, NULL, 0);
+	}
+
 	return ret;
 }
 
@@ -540,6 +553,10 @@ static int php_stdiop_flush(php_stream *stream)
 	 * something completely different.
 	 */
 	if (data->file) {
+		if (EG(active)) {
+			/* clear stat cache as there might be a write so mtime and ctime might have changed */
+			php_clear_stat_cache(0, NULL, 0);
+		}
 		return fflush(data->file);
 	}
 	return 0;
@@ -1154,6 +1171,12 @@ PHPAPI php_stream *_php_stream_fopen(const char *filename, const char *mode, zen
 			ret = php_stream_fopen_from_fd_rel(fd, mode, persistent_id, (open_flags & O_APPEND) == 0);
 		}
 
+		if (EG(active)) {
+			/* clear stat cache as mtime and ctime might got changed - phar can use stream before
+			 * cache is initialized so we need to check if the execution is active. */
+			php_clear_stat_cache(0, NULL, 0);
+		}
+
 		if (ret)	{
 			if (opened_path) {
 				*opened_path = zend_string_init(realpath, strlen(realpath), 0);