php stay of user selection of radio button on refresh of form (due to error checking or other)

php stay of user selection of radio button on refresh of form (due to
error checking or other)

References

Reference NO 1

http://stackoverflow.com/questions/15196155/php-stay-of-user-selection-of-radio-button-on-refresh-of-form-due-to-error-chec

Reference NO 2

http://stackoverflow.com/questions/15196155/php-stay-of-user-selection-of-radio-button-on-refresh-of-form-due-to-error-chec

Reference NO 3

http://www.cs.wcupa.edu/~rkline/php/forms.html

Reference NO 4

http://formtoemail.com/support/pre_populate_form.php

Reference NO 5

http://green-beast.com/gbcf-v3/

Reference NO 6

http://uxdesign.smashingmagazine.com/2012/06/27/form-field-validation-errors-only-approach/

Reference NO 7

http://www.daniweb.com/web-development/php/threads/124500/session-time-out-in-php

Reference NO 8

http://www.waze.com/forum/faq.php