diff --git a/ext/dom/document.c b/ext/dom/document.c
index c2c436513d8..1bf4c541ddd 100644
--- a/ext/dom/document.c
+++ b/ext/dom/document.c
@@ -1700,7 +1700,7 @@ PHP_FUNCTION(dom_document_save)
 	char *file;
 	long options = 0;
 
-	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Os|l", &id, dom_document_class_entry, &file, &file_len, &options) == FAILURE) {
+	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Op|l", &id, dom_document_class_entry, &file, &file_len, &options) == FAILURE) {
 		return;
 	}
 
@@ -1930,7 +1930,7 @@ static void _dom_document_schema_validate(INTERNAL_FUNCTION_PARAMETERS, int type
 	int                     is_valid;
 	char resolved_path[MAXPATHLEN + 1];
 
-	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Op|l", &id, dom_document_class_entry, &source, &source_len, &flags) == FAILURE) {
+	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Os|l", &id, dom_document_class_entry, &source, &source_len, &flags) == FAILURE) {
 		return;
 	}
 
@@ -1943,6 +1943,10 @@ static void _dom_document_schema_validate(INTERNAL_FUNCTION_PARAMETERS, int type
 
 	switch (type) {
 	case DOM_LOAD_FILE:
+		if (CHECK_NULL_PATH(source, source_len)) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid Schema file source");
+			RETURN_FALSE;
+		}
 		valid_file = _dom_get_valid_file_path(source, resolved_path, MAXPATHLEN  TSRMLS_CC);
 		if (!valid_file) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid Schema file source");
@@ -2026,7 +2030,7 @@ static void _dom_document_relaxNG_validate(INTERNAL_FUNCTION_PARAMETERS, int typ
 	int                     is_valid;
 	char resolved_path[MAXPATHLEN + 1];
 
-	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Op", &id, dom_document_class_entry, &source, &source_len) == FAILURE) {
+	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Os", &id, dom_document_class_entry, &source, &source_len) == FAILURE) {
 		return;
 	}
 
@@ -2039,6 +2043,10 @@ static void _dom_document_relaxNG_validate(INTERNAL_FUNCTION_PARAMETERS, int typ
 
 	switch (type) {
 	case DOM_LOAD_FILE:
+		if (CHECK_NULL_PATH(source, source_len)) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid RelaxNG file source");
+			RETURN_FALSE;
+		}
 		valid_file = _dom_get_valid_file_path(source, resolved_path, MAXPATHLEN  TSRMLS_CC);
 		if (!valid_file) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid RelaxNG file source");
@@ -2119,7 +2127,7 @@ static void dom_load_html(INTERNAL_FUNCTION_PARAMETERS, int mode) /* {{{ */
 
 	id = getThis();
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "p|l", &source, &source_len, &options) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &source, &source_len, &options) == FAILURE) {
 		return;
 	}
 
@@ -2129,6 +2137,10 @@ static void dom_load_html(INTERNAL_FUNCTION_PARAMETERS, int mode) /* {{{ */
 	}
 
 	if (mode == DOM_LOAD_FILE) {
+		if (CHECK_NULL_PATH(source, source_len)) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid file source");
+			RETURN_FALSE;
+		}
 		ctxt = htmlCreateFileParserCtxt(source, NULL);
 	} else {
 		source_len = xmlStrlen(source);
@@ -2217,7 +2229,7 @@ PHP_FUNCTION(dom_document_save_html_file)
 	char *file;
 	const char *encoding;
 
-	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Os", &id, dom_document_class_entry, &file, &file_len) == FAILURE) {
+	if (zend_parse_method_parameters(ZEND_NUM_ARGS() TSRMLS_CC, getThis(), "Op", &id, dom_document_class_entry, &file, &file_len) == FAILURE) {
 		return;
 	}
 
diff --git a/ext/gd/gd.c b/ext/gd/gd.c
index 0642d45ec23..52758830351 100644
--- a/ext/gd/gd.c
+++ b/ext/gd/gd.c
@@ -1750,7 +1750,7 @@ PHP_FUNCTION(imagefilledarc)
 	long cx, cy, w, h, ST, E, col, style;
 	gdImagePtr im;
 	int e, st;
-	
+
 	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "rllllllll", &IM, &cx, &cy, &w, &h, &ST, &E, &col, &style) == FAILURE) {
 		return;
 	}
@@ -1991,7 +1991,7 @@ PHP_FUNCTION(imagegrabwindow)
 	if ( handle == 0 ) {
 		goto clean;
 	}
-	pPrintWindow = (tPrintWindow) GetProcAddress(handle, "PrintWindow");  
+	pPrintWindow = (tPrintWindow) GetProcAddress(handle, "PrintWindow");
 
 	if ( pPrintWindow )  {
 		pPrintWindow(window, memDC, (UINT) client_area);
@@ -3860,7 +3860,7 @@ static void php_imagettftext_common(INTERNAL_FUNCTION_PARAMETERS, int mode, int
 			if (zend_hash_get_current_data_ex(HASH_OF(EXT), (void **) &item, &pos) == FAILURE) {
 				continue;
 			}
-		
+
 			if (strcmp("linespacing", key) == 0) {
 				convert_to_double_ex(item);
 				strex.flags |= gdFTEX_LINESPACE;
@@ -3939,7 +3939,7 @@ PHP_FUNCTION(imagepsloadfont)
 	struct stat st;
 #endif
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &file, &file_len) == FAILURE) {
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "p", &file, &file_len) == FAILURE) {
 		return;
 	}
 
@@ -4279,11 +4279,11 @@ PHP_FUNCTION(imagepsbbox)
 	if (argc != 3 && argc != 6) {
 		ZEND_WRONG_PARAM_COUNT();
 	}
-	
+
 	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "srl|lld", &str, &str_len, &fnt, &sz, &sp, &wd, &angle) == FAILURE) {
 		return;
 	}
-	
+
 	if (argc == 6) {
 		space = sp;
 		add_width = wd;
diff --git a/ext/standard/exec.c b/ext/standard/exec.c
index 683878877b3..06c068399d0 100644
--- a/ext/standard/exec.c
+++ b/ext/standard/exec.c
@@ -380,6 +380,14 @@ PHPAPI char *php_escape_shell_arg(char *str)
 		}
 	}
 #ifdef PHP_WIN32
+	if (y > 0 && '\\' == cmd[y - 1]) {
+		int k = 0, n = y - 1;
+		for (; n >= 0 && '\\' == cmd[n]; n--, k++);
+		if (k % 2) {
+			cmd[y++] = '\\';
+		}
+	}
+
 	cmd[y++] = '"';
 #else
 	cmd[y++] = '\'';