Will php code exit after echo for ajax?

I am running a typical php-engined ajax webpage. I use echo to return a html string from the php code. My question is, if I have some开发者_开发问答 other code after the echo, will those code get executed? Or echo behaves similar to exit, which immediately return and stop running the php code? Thanks.

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No, echo in no way exits, you normally have more than one echo in a script. exit does take a string argument that it will output before exiting, however, so you can do:

exit("your string here");

and it will output the string and exit

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No, echo would not. To exit after echoing things, you'd say

echo "Dear me, good bye!"; exit();

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echo will simply return text to ajax javascript part; however the code after or before echo/echos will execute

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No. PHP scripts are rendered in their entirety unless you explicitly exit them. ANY output on a script will be passed back to the ajax function if it was called through ajax.

echo 'This gets outputted<br />';
echo 'As does this';

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If you must use a single file and you want your script to exit after performing ajax request with out having to add extra vars to your ajax url or evaluate vars to exit, i would suggest creating a function that performs your ajax, have the function return true on success, then do:

if(ajaxFunction($paramOne, $paramTwo)){exit();}