php - Using imagepng() with stream wrappers fails -

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on local server, able create image gd , export using imagepng($imgresource, $path)

i trying deploy aws instance, , on aws instance receive error unable open 'public://pictures/pic.png' writing: no such file or directory in mymodule_myfunction_form_submit()

the directory exists - can call imagecreatefrompng($src) on image that's in directory, , creates gd resource. then, when try imagepng($img, $path) exact same gd resource same folder, spits out same error.

i have set privileges on directory 777, owner/group apache:apache, yet receive same error every time.

i running gd (libpng v1.2.49) on php 5.3.27 on remote server , gd (libpng v1.2.50) on php 5.4.16 on local server.


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