https://www.myfonts.com/ | raising errors - no tests

https://www.myfonts.com/
Error raised by using a specific image that doesn't fit any kind of character. Submit without any value to get the error. That's all.

( ! ) Warning: implode(): Invalid arguments passed in /home/serve_me/www/trunk/include/WhatTheFont/Utils.php on line 24
Call Stack
#	Time	Memory	Function	Location
1	0.0000	246064	{main}( )	.../rewrite.php:0
2	0.0246	1993640	require( '/home/serve_me/www/trunk/webroot/widgets/wtf/wtf.php' )	.../rewrite.php:52
3	0.0300	3346192	require( '/home/serve_me/www/trunk/webroot/widgets/wtf/results.php' )	.../wtf.php:19
4	0.0484	3572104	WhatTheFont\WhatTheFont->getFontMatches( )	.../results.php:29
5	0.0484	3572336	WhatTheFont\Client->getResult( )	.../WhatTheFont.php:192
6	0.0484	3572336	WhatTheFont\Client->attemptConnection( )	.../Client.php:227
7	0.0500	3572872	WhatTheFont\Client->getMessage( )	.../Client.php:208
8	0.0500	3573080	WhatTheFont\Utils::convertCharacters( )	.../Client.php:195
9	0.0500	3573304	implode ( )	.../Utils.php:24

( ! ) Warning: implode(): Invalid arguments passed in /home/serve_me/www/trunk/webroot/widgets/wtf/results.php on line 37
Call Stack
#	Time	Memory	Function	Location
1	0.0000	246064	{main}( )	.../rewrite.php:0
2	0.0246	1993640	require( '/home/serve_me/www/trunk/webroot/widgets/wtf/wtf.php' )	.../rewrite.php:52
3	0.0300	3346192	require( '/home/serve_me/www/trunk/webroot/widgets/wtf/results.php' )	.../wtf.php:19
4	0.0793	3645072	implode ( )	.../results.php:37