PHP image upload, compress, save to server related issues

PHP picture upload, compress, save to server problem?
Very simple upload server, from temporary files, ' tmp_name ' get pictures,
Then compress.

$dstimage = Imagecreatetruecolor ($dst _w, $dst _h);
Imagecopyresampled ($dstimage, $srcimage, $dst _x, $dst _y, $src _x, $src _y, $dst _w, $dst _h, $src _w, $src _h);
Imagedestroy ($srcimage);

Looking for a long time have not found how to save the memory in the picture $dstimage method?

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PHP Code

/** Open Output Buffer **/ob_start (),/** output image **/imagepng ($dstimage),/** get buffer contents **/$img = ob_get_contents ();/** Empty output buffer **/ob_end_ Clean ();/** then save the $img to the file. **/
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   PHP Code
   
   
   
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