Joomla “Not a valid image” issue?

While uploading images we are receiving “Not a valid image” error message. To resolve error message refer following steps.

First login into Joomla admin section and check box following option.

Global Config > System
– restrict uploads = No
– check mime types = No

Second edit configuration.php file and change.

From

var $ftp_enable = ‘1’;

To

var $ftp_enable = ‘0’;

Third comment following line in php.ini file if you are using customize php.ini file (mostly used on SuExec server).

;upload_tmp_dir = tmp

And now try to upload the image.