Warning: pathinfo() expects parameter 1 to be string, array given in

If you get about pathinfo 

the you use this code

$ext = pathinfo($img, PATHINFO_EXTENSION);

yaaa

$img = pathinfo($img, PATHINFO_FILENAME);

If not work the use above the script

error_reporting(0);

the confirm this problem not come again

Warning: pathinfo() expects parameter 1 to be string, array given in /storage/emulated/0/www/project/olx/resale_v2/web/post-ad.php on line 591
Call Stack
#	Time	Memory	Function	Location
1	0.0058	145608	{main}( )	../post-ad.php:0
2	0.0092	164624	pathinfo ( )	../post-ad.php:591