Fixes phalcon#12349

CHANGELOG.md

@@ -14,6 +14,7 @@
 - Fixed `Phalcon\Session\Adapter\Libmemcached::read`, `Phalcon\Session\Adapter\Libmemcached::destroy`, `Phalcon\Session\Adapter\Memcache::read`, `Phalcon\Session\Adapter\Memcache::destroy`, `Phalcon\Session\Adapter\Redis::read` and `Phalcon\Session\Adapter\Redis::destroy` in accordance with the `session_set_save_handler` API [#12206](https://github.com/phalcon/cphalcon/pull/12206)
 - Fixed `Phalcon\Validation::getValue()` to use filters when having entity
 - Fixed `Phalcon\Db\Dialect\Mysql::describeReferences()` and `Phalcon\Db\Dialect\Postgresql::describeReferences()` to return proper sql
+- Fixed `Phalcon\Validation\Validator\File` array to string conversion in `minResolution` and `maxResolution` [#12349](https://github.com/phalcon/cphalcon/issues/12349)
 
 
 # [3.0.1](https://github.com/phalcon/cphalcon/releases/tag/v3.0.1) (2016-08-24)

phalcon/validation/validator/file.zep

@@ -97,7 +97,9 @@ class File extends Validator
 	 */
 	public function validate(<Validation> validation, string! field) -> boolean
 	{
-		var value, message, label, replacePairs, types, byteUnits, unit, maxSize, matches, bytes, mime, tmp, width, height, minResolution, maxResolution, minWidth, maxWidth, minHeight, maxHeight, fieldTypes, code;
+		var value, message, label, replacePairs, types, byteUnits, unit, maxSize, matches, bytes, mime, tmp, width,
+		    height, minResolution, maxResolution, minWidth, maxWidth, minHeight, maxHeight, fieldTypes, code,
+		    minResolutionArray, maxResolutionArray;
 
 		let value = validation->getValue(field),
 			label = this->getOption("label");
@@ -251,9 +253,9 @@ class File extends Validator
 				if typeof minResolution == "array" {
 					let minResolution = minResolution[field];
 				}
-				let minResolution = explode("x", minResolution),
-					minWidth = minResolution[0],
-					minHeight = minResolution[1];
+				let minResolutionArray = explode("x", minResolution),
+					minWidth = minResolutionArray[0],
+					minHeight = minResolutionArray[1];
 			} else {
 				let minWidth = 1,
 					minHeight = 1;
@@ -281,9 +283,9 @@ class File extends Validator
 				if typeof maxResolution == "array" {
 					let maxResolution = maxResolution[field];
 				}
-				let maxResolution = explode("x", maxResolution),
-					maxWidth = maxResolution[0],
-					maxHeight = maxResolution[1];
+				let maxResolutionArray = explode("x", maxResolution),
+					maxWidth = maxResolutionArray[0],
+					maxHeight = maxResolutionArray[1];
 
 				if width > maxWidth || height > maxHeight {
 					let message = this->getOption("messageMaxResolution"),