Add zend_ini_string_ex so that the you can differentiate between NULL as a value and its absence, this is important for ini_get. Related to bug #42657 and #43348

Zend/zend_ini.c

@@ -368,22 +368,42 @@ ZEND_API double zend_ini_double(char *name, uint name_length, int orig) /* {{{ *
 }
 /* }}} */
 
-ZEND_API char *zend_ini_string(char *name, uint name_length, int orig) /* {{{ */
+ZEND_API char *zend_ini_string_ex(char *name, uint name_length, int orig, zend_bool *exists) /* {{{ */
 {
 	zend_ini_entry *ini_entry;
 	TSRMLS_FETCH();
 
 	if (zend_hash_find(EG(ini_directives), name, name_length, (void **) &ini_entry) == SUCCESS) {
+		if (exists) {
+			*exists = 1;
+		}
+
 		if (orig && ini_entry->modified) {
-			return ini_entry->orig_value ? ini_entry->orig_value : "";
+			return ini_entry->orig_value;
 		} else {
-			return ini_entry->value      ? ini_entry->value      : "";
+			return ini_entry->value;
 		}
 	} else {
+		if (exists) {
+			*exists = 0;
+		}
 		return NULL;
 	}
+}
+/* }}} */
 
-	return "";
+ZEND_API char *zend_ini_string(char *name, uint name_length, int orig) /* {{{ */
+{
+	zend_bool exists = 1;
+	char *return_value;
+
+	return_value = zend_ini_string_ex(name, name_length, orig, &exists);
+	if (!exists) {
+		return NULL;
+	} else if (!return_value) {
+		return_value = "";
+	}
+	return return_value;
 }
 /* }}} */
 

Zend/zend_ini.h

@@ -104,6 +104,7 @@ ZEND_API void display_ini_entries(zend_module_entry *module);
 ZEND_API long zend_ini_long(char *name, uint name_length, int orig);
 ZEND_API double zend_ini_double(char *name, uint name_length, int orig);
 ZEND_API char *zend_ini_string(char *name, uint name_length, int orig);
+ZEND_API char *zend_ini_string_ex(char *name, uint name_length, int orig, zend_bool *exists);
 
 ZEND_API int zend_ini_register_displayer(char *name, uint name_length, void (*displayer)(zend_ini_entry *ini_entry, int type));
 
@@ -157,7 +158,7 @@ END_EXTERN_C()
 
 #define INI_INT(name) zend_ini_long((name), sizeof(name), 0)
 #define INI_FLT(name) zend_ini_double((name), sizeof(name), 0)
-#define INI_STR(name) zend_ini_string((name), sizeof(name), 0)
+#define INI_STR(name) zend_ini_string_ex((name), sizeof(name), 0, NULL)
 #define INI_BOOL(name) ((zend_bool) INI_INT(name))
 
 #define INI_ORIG_INT(name)	zend_ini_long((name), sizeof(name), 1)