Question

while reading about cookies i found difficulty to grasp the following statement
"setcookie() must be called before any output to the HTTP response. The main reason is that PHP is not buffering the HTTP response" please help me to interpret it in easy way

Answer 1

为了理解这一说法,你需要了解以下几个方面:

HTTP responses consist of two parts, a set of "headers" (key-value pairs) and then the "body" which is the actual data e.g. a web page or image.
HTTP headers have to be sent first, and once even one byte of the "body" has been sent, no more headers will be processed by the client.
Cookies, among other things, are sent to the client in the form of HTTP headers.

因此,它说的是:除非你做一些特殊的事情,否则,你即刻的“echo”东西,或者在<外有任何数据? ......?>栏,PHP将用这些数据开始反应机构。在这一点之后,再也不能派头脑,包括 co子制造头盔。

Answer 2

这只是意味着,你需要确保所有头脑(ook通过吉大港山区的头盔确定)为产出 <>之前> 。

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