Improved compatibility with Windows and MsSQL

api.php

 			return "'".mysqli_real_escape_string($db,$param)."'";
 		}, $sql);
 		//echo "\n$sql\n";
-		return mysqli_query($db,$sql);
+		return mysqli_query($db,$sql);
 	}
 
 	protected function fetch_assoc($result) {
 		if (strtoupper(substr($sql,0,6))=='INSERT') {
 			$sql .= ';SELECT SCOPE_IDENTITY()';
 		}
-		$result = sqlsrv_query($db,$sql,$args);
-		if ($result===false) {
-			$errors = sqlsrv_errors();
-			$this->exitWith409(compact('sql','args','errors'));
-		}
-		return $result;
+		return sqlsrv_query($db,$sql,$args)?:null;
 	}
 
 	protected function fetch_assoc($result) {
 	}
 
 	protected function applyInputSanitizer($callback,$action,$database,$table,&$input) {
-		if (is_array($input)) {
-			foreach (array_keys($input) as $i) {
-				$this->applyInputSanitizer($callback,$action,$database,$table,$input[$i]);
-			}
-			return;
-		}		
 		if (is_callable($callback,true)) foreach ((array)$input as $key=>$value) {
 			$input->$key = $callback($action,$database,$table,$key,$value);
 		}
 	}
 	
 	protected function applyInputValidator($callback,$action,$database,$table,&$input) {
-		if (is_array($input)) {
-			foreach (array_keys($input) as $i) {
-				$this->applyInputValidator($callback,$action,$database,$table,$input[$i]);
-			}
-			return;
-		}	
 		$errors = array();
 		if (is_callable($callback,true)) foreach ((array)$input as $key=>$value) {
 			$error = $callback($action,$database,$table,$key,$value);
 	protected function exitWith422($object) {
 		if (isset($_SERVER['REQUEST_METHOD'])) {
 			header('Content-Type:',true,422);
-			die('Unprocessable Entity');
+			die(json_encode($object));
 		} else {
 			throw new \Exception(json_encode($object));
 		}
 		$input = (object)array();
 		$data = trim(file_get_contents($post));
 		if (strlen($data)>0) {
-			if ($data[0]=='{' || $data[0]=='[') {
+			if ($data[0]=='{') {
 				$input = json_decode($data);
 			} else {
 				parse_str($data, $input);
 	}
 	
 	protected function limitInputFields($input,$fields) {
-		if (is_array($input)) {
-			foreach (array_keys($input) as $i) {
-				$input[$i] = $this->limitInputFields($input[$i],$fields);
-			}
-			return $input;
-		}
 		foreach (array_keys((array)$input) as $key) {
 			if (!isset($fields[$key])) {
 				unset($input->$key);
 	}
 
 	protected function convertBinary($input,$fields) {
-		if (is_array($input)) {
-			foreach (array_keys($input) as $i) {
-				$input[$i] = $this->convertBinary($input[$i],$fields);
-			}
-			return $input;
-		}
 		foreach ($fields as $key=>$field) {
 			if (isset($input->$key) && $input->$key && $this->is_binary_type($field)) {
 				$data = $input->$key;
 		extract($parameters);
 		if (!$input) $this->exitWith404('input');
 		$this->startOutput($callback);
-		if (!is_array($input)) {
-			echo json_encode($this->createObject($input,$table,$db));
-		} else {
-			$result = array();
-			foreach ($input as $i) {
-				$result[] = $this->createObject($i,$table,$db);
-			}
-			echo json_encode($result);
-		}
+		echo json_encode($this->createObject($input,$table,$db));
 		$this->endOutput($callback);
 	}
 

tests/tests.php

 		$data = 'data://text/plain;base64,'.base64_encode($data);
 
 		switch(MySQL_CRUD_API_Config::$dbengine) {
-			case 'mssql':	$class = 'MsSQL_CRUD_API'; break;
-			case 'pgsql':	$class = 'PgSQL_CRUD_API'; break;
-			case 'mysql':	$class = 'MySQL_CRUD_API'; break;
+			case 'mssql':	$class = 'MsSQL_CRUD_API'; $charset = 'utf-8'; break;
+			case 'pgsql':	$class = 'PgSQL_CRUD_API'; $charset = 'utf8'; break;
+			case 'mysql':	$class = 'MySQL_CRUD_API'; $charset = 'utf8'; break;
 			default:	die("DB engine not supported: $dbengine\n");
 		}
 
 				'username'=>MySQL_CRUD_API_Config::$username,
 				'password'=>MySQL_CRUD_API_Config::$password,
 				'database'=>MySQL_CRUD_API_Config::$database,
-				'charset'=>'utf8',
+				'charset'=>$charset,
 				// callbacks
 				'table_authorizer'=>function($action,$database,$table) { return true; },
 				'column_authorizer'=>function($action,$database,$table,$column) { return $column!='password'; },
 		$test->expect('{"id":"2","name":"article","icon":null}');
 	}
 
-	public function testAddPosts()
-	{
-		$test = new API($this);
-		$test->post('/posts','[{"user_id":"1","category_id":"1","content":"tests"},{"user_id":"1","category_id":"1","content":"tests"}]');
-		$test->expect('[15,16]');
-	}
-
 	public function testAddPostFailure()
 	{
 		$test = new API($this);
 		$test->expect('{"id":"2","name":"alert();","icon":null}');
 	}
 	
+	public function testErrorOnInvalidJson()
+	{
+		$test = new API($this);
+		$test->post('/posts','{"}');
+		$test->expect('Not found (input)');
+	}
+		
 	public function testErrorOnDuplicatePrimaryKey()
 	{
-		// to be implemented
+		$test = new API($this);
+		$test->post('/posts','{"id":"1","user_id":"1","category_id":"1","content":"blog started (duplicate)"}');
+		$test->expect('null');
 	}
 }