Adding has_file method

Signed-off-by: Koen Schmeets <k.schmeets@gmail.com>

laravel/input.php

@@ -178,6 +178,18 @@ class Input {
 		return array_get($_FILES, $key, $default);
 	}
 
+	/**
+	 * Determine if the uploaded data contains a file.
+	 *
+	 * @param  string  $key
+	 * @return bool
+	 */
+	public static function has_file($key)
+	{
+		$file = static::file($key);
+		return ! empty($file['tmp_name']);
+	}
+	
 	/**
 	 * Move an uploaded file to permanent storage.
 	 *