PHP - setcookie(); not working

There are several reasons why the setcookie() function may not be working. Some possible issues include:

  • The setcookie() function must be called before any output is sent to the browser. Make sure that the function is called before any HTML or whitespace is outputted.
  • The path and domain parameters in the setcookie() function may be set incorrectly. Make sure that the path and domain match the settings on your server.
  • The browser may have cookies disabled. Ask the user to check their browser settings to ensure cookies are enabled.
  • The server may be configured to not accept cookies. Check your server's configuration to ensure that cookies are allowed.

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It is always helpful to check the return value of the setcookie function. If the function returns false, you can check the last error by calling error_get_last() function.

It would be helpful if you could share the code which you are trying to use setcookie function and any error message you are getting.