Why jqgrid can't get json data from joomla?

Why jqgrid can't get json data from joomla?

References

Reference NO 1

http://stackoverflow.com/questions/15188014/why-jqgrid-cant-get-json-data-from-joomla

Reference NO 2

http://stackoverflow.com/questions/16398400/how-to-get-the-json-in-joomla-3

Reference NO 3

http://stackoverflow.com/questions/9533827/joomla-strips-jqgrid-pagination-and-sorting-params

Reference NO 4

http://www.trirand.com/blog/?page_id=393/help/cant-read-rows-page-sord-and-sixd-params/

Reference NO 5

http://www.packtpub.com/article/implementing-ajax-grid-jquery-data-grid-plugin-jqgrid

Reference NO 6

http://php.net/manual/de/function.json-encode.php

Reference NO 7

#EANF#

Reference NO 8

#EANF#