php ajax页面输出

Question

in my case , i need to return value from a ajax page. as i know , there is two way to do it: echo , return.

echo 0;
exit;

or

return 0;
exit;

is there any different between them?

Answer 1

AJAX retrieves the output from another page. echo will output something, but return is for returning a value from a function.

Use echo.