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?
Add a comment
|
2 Answers
If I were you, I would use :
echo '0';
exit();
Why ? Because you don't want to output an integer (treated as bool in PHP, I assume 0/1). You want a string so AJAX can read it.
Return is for function and stuff, not to end a page.
2 Comments
Travesty3
You can echo the integer 0 and it will show up just the same as the string '0'. If you
echo false, however, nothing shows up in the output. Still, I suppose it is safest to always echo as a string to ensure that extra data isn't truncated, like echo 1.0, which would just echo '1' and leave off the '.0'.
David Bélanger
Yes, true. But it is only a "principle". PHP threat 0 and 1 as false and true respectively. An HTML page must be treated as a giant string and not an integer. This is why I suggest using
echo '0'; even if the output is the same;AJAX retrieves the output from another page. echo will output something, but return is for returning a value from a function.
Use echo.
