问题
I have a cookie that will not set on the remote server, works find locally. No error messages, var_dump gets me Null, echo is blank.
<php
setcookie('ymp','14', time()+3600);
session_start();
?>
I can set a javascript cookie fine. The opening tag is line 1 of the page.
Any ideas
Thanks Gary
On Edit
I have some comments I posted below, it is a 3 file process.
Page one is to set the cookie, as above.
Page two I have for debugging
<php var_dump($_COOKIE['ymp']); echo'<br />'.$_COOKIE['ymp'];?>
Page 3, and again this all worked locally I have
<?php
if($_COOKIE['ymp']!=='14')
{die('Sorry, you have not had your delightful little pastry yet.... try again.');}
?>
I set a js cookie, and changed the code to reflect the different cookie name and it worked fine.
I also reset the time to +86400, because of the two hour time difference to the server, though I don't think that is really required.
Thanks for all the help
Gary
回答1:
You can't read the value of a cookie until a new page request is made. This is because the value of cookie data is sent with the page request. So it isn't available for to access its value until after it is set and a new page request is made.
Also, session_start() has no effect on cookies. They are two different things. (Sessions do typically use cookies to store the session ID but that is irrelevant).
回答2:
This is rather peculiar - I assume this could have something to do with PHP configuration.
See what the return value of setcookie function is - it may be FALSE if output has been already sent before the function call. You did mention it is right at the start of your script, however there could be other entities outputting data (pre-executed scripts on the server perhaps?)
It's also possible that your browser is set to not accept cookies from certain domain - check your configuration.
Please provide any other relevant code and indicate how you check if cookies are set.
回答3:
This problem never did solve, I ended up writing a new file to a different domain on the same host, gave the cookie a different name and value (is it possible that a 3 character name cookie with a 2 digit value too small??) and it worked as supposed expected.
Thank you all for your help... too busy to do a CSI investigation as to the how's and whys.
Gary
回答4:
It could be because you don't specify a path and/or a domain for the cookie. Try this instead:
<?php
setcookie('ymp','14', time()+3600, '/', 'yourdomain.com')
?>
来源：https://stackoverflow.com/questions/13436665/cookie-does-not-set