Using text box value as PHP variable

Using text box value as PHP variable

i am using a java script calender date picker in my php form,
it gives date in a text box. I want to use the text box value as a
variable in php so that to use it in echo
for example:
my date picker is :-
echo "<input type=text id=exampleV name=dateIV maxlength=10 />";
the date picker is working fine
i want that date which comes in text box should be used as php variable
plz help