diff --git a/ext/standard/file.c b/ext/standard/file.c
index a7b73f1fe56eb..f019e1f94ed63 100644
--- a/ext/standard/file.c
+++ b/ext/standard/file.c
@@ -2106,6 +2106,10 @@ PHP_FUNCTION(realpath)
 		Z_PARAM_PATH(filename, filename_len)
 	ZEND_PARSE_PARAMETERS_END();
 
+	if (filename_len == 0) {
+        php_error_docref(NULL, E_DEPRECATED, "Passing empty string to realpath() is deprecated, use getcwd() instead");
+    }
+
 	if (VCWD_REALPATH(filename, resolved_path_buff)) {
 		if (php_check_open_basedir(resolved_path_buff)) {
 			RETURN_FALSE;
diff --git a/ext/standard/tests/file/readlink_realpath_variation3.phpt b/ext/standard/tests/file/readlink_realpath_variation3.phpt
index 44a53f0dfb353..1644f005073fa 100644
--- a/ext/standard/tests/file/readlink_realpath_variation3.phpt
+++ b/ext/standard/tests/file/readlink_realpath_variation3.phpt
@@ -43,10 +43,14 @@ bool(false)
 
 Warning: readlink(): %s in %s on line %d
 bool(false)
+
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
 string(%d) "%s"
 -- Iteration4 --
 
 Warning: readlink(): %s in %s on line %d
 bool(false)
+
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
 string(%d) "%s"
 Done
diff --git a/ext/standard/tests/file/realpath_bug77484.phpt b/ext/standard/tests/file/realpath_bug77484.phpt
index 9aa3a335c2a96..39a3ae44f0356 100644
--- a/ext/standard/tests/file/realpath_bug77484.phpt
+++ b/ext/standard/tests/file/realpath_bug77484.phpt
@@ -36,6 +36,7 @@ $rp2 = realpath('./');
 var_dump($old_cwd, $new_cwd, $rp0, $rp1, $rp2);
 ?>
 --EXPECTF--
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
 string(%d) "%s"
 bool(false)
 bool(false)
diff --git a/ext/standard/tests/file/realpath_empty_string.phpt b/ext/standard/tests/file/realpath_empty_string.phpt
new file mode 100644
index 0000000000000..4e8b3d7fd6f7c
--- /dev/null
+++ b/ext/standard/tests/file/realpath_empty_string.phpt
@@ -0,0 +1,11 @@
+--TEST--
+realpath() emits deprecation warning when passing empty string
+--FILE--
+<?php
+
+var_dump(realpath(""));
+
+?>
+--EXPECTF--
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
+string(%d) "%s"
diff --git a/ext/standard/tests/file/realpath_variation-win32-mb.phpt b/ext/standard/tests/file/realpath_variation-win32-mb.phpt
index ea2f1c6feca15..35a740ee5a4d3 100644
--- a/ext/standard/tests/file/realpath_variation-win32-mb.phpt
+++ b/ext/standard/tests/file/realpath_variation-win32-mb.phpt
@@ -86,7 +86,11 @@ bool(false)
 -- Iteration2 --
 bool(false)
 -- Iteration3 --
+
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
 string(%d) "%s"
 -- Iteration4 --
+
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
 string(%d) "%s"
 Done
diff --git a/ext/standard/tests/file/realpath_variation-win32.phpt b/ext/standard/tests/file/realpath_variation-win32.phpt
index 1ea8ced7d0eaa..b423c4e81a044 100644
--- a/ext/standard/tests/file/realpath_variation-win32.phpt
+++ b/ext/standard/tests/file/realpath_variation-win32.phpt
@@ -86,7 +86,11 @@ bool(false)
 -- Iteration2 --
 bool(false)
 -- Iteration3 --
+
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
 string(%d) "%s"
 -- Iteration4 --
+
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
 string(%d) "%s"
 Done
diff --git a/ext/standard/tests/file/tempnam_variation3-win32.phpt b/ext/standard/tests/file/tempnam_variation3-win32.phpt
index 5bc4f5ec884d1..c57c12d9aa7ea 100644
--- a/ext/standard/tests/file/tempnam_variation3-win32.phpt
+++ b/ext/standard/tests/file/tempnam_variation3-win32.phpt
@@ -99,6 +99,10 @@ OK
 -- Iteration 4 --
 
 Notice: tempnam(): file created in the system's temporary directory in %stempnam_variation3-win32.php on line %d
+
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
+
+Deprecated: realpath(): Passing empty string to realpath() is deprecated, use getcwd() instead in %s on line %d
 Failed, not created in the correct directory %s vs %s
 0
 -- Iteration 5 --