Upload PNG

gistfile1.txt

FUNCTION AFTER UPLOAD: 
attachment_ids=Array ( [0] => 121 ) 
result=1
post_id=32Array ( [post_ID] => 32 [post_title] => Erlon Cruz [ra] => 123456 [action] => upload_ugc [form_layout] => image [fu_nonce] => d71734168a [_wp_http_referer] => /?p=32 [ff] => f3c01b8520a3bdaf1f0141dd2b20f488 [form_post_id] => 32 ) Post name = Trabalho 1 - (ICA)
Upload dir
Array ( [path] => /var/www/wordpress/wp-content/uploads/2014/07 [url] => http://www.erloncruz.com.br/wp-content/uploads/2014/07 [subdir] => /2014/07 [basedir] => /var/www/wordpress/wp-content/uploads [baseurl] => http://www.erloncruz.com.br/wp-content/uploads [error] => ) Getting attacments to atta 121 
Array ( [width] => 940 [height] => 168 [file] => 2014/07/banner1.png [sizes] => Array ( [thumbnail] => Array ( [file] => banner1-150x150.png [width] => 150 [height] => 150 [mime-type] => image/png ) [medium] => Array ( [file] => banner1-300x53.png [width] => 300 [height] => 53 [mime-type] => image/png ) ) [image_meta] => Array ( [aperture] => 0 [credit] => [camera] => [caption] => [created_timestamp] => 0 [copyright] => [focal_length] => 0 [iso] => 0 [shutter_speed] => 0 [title] => ) ) 
Copying '/var/www/wordpress/wp-content/uploads/2014/07/banner1.png' to '/exports/data/32/123456.png'

Notice: Array to string conversion in /var/www/wordpress/wp-content/plugins/frontend-uploader/lib/php/functions.php on line 312
FUNCTION UPLOAD RESULT: 
layout=image
result=ArrayArray ( [post_ID] => 32 [post_title] => Erlon Cruz [ra] => 123456 [action] => upload_ugc [form_layout] => image [fu_nonce] => d71734168a [_wp_http_referer] => /?p=32 [ff] => f3c01b8520a3bdaf1f0141dd2b20f488 [form_post_id] => 32 ) 
Warning: Cannot modify header information - headers already sent in /var/www/wordpress/wp-includes/pluggable.php on line 1121