string(123) "convert '' -quality 50 -resize 400x300^ -gravity center -crop 400x300+0+0 'thumbnails/d41d8cd98f00b204e9800998ecf8427e.jpg'"
NULL
string(47) "thumbnails/d41d8cd98f00b204e9800998ecf8427e.jpg"
array(0) {
}
int(127)
string(0) ""