Description
bool 
ps_delete ( resource psdoc )
   Mainly frees memory used by the document. Also closes a file, if it was not
   closed before with ps_close(). You should in any case
   close the file with ps_close() before, because
   ps_close() not just closes the file but also outputs a
   trailor containing PostScript comments like the number of pages in the
   document and adding the bookmark hierarchy.