Re: When are headers sent? (headers_sent function)

Robert Cummings wrote: > On Fri, 2007-02-09 at 11:24 -0800, Philippe Piernot wrote: >> I understand that the headers_sent() function will tell me whether headers >> have been sent or not. >> What I do not understand is what triggers the headers to be sent to the >> browser in the first place. >> Does this happen as soon as the first output occurs? > > Probably. Unless you have output buffering enabled, in which case > headers are sent when the PHP process completes. or whenever the outer most output buffer is flushed [to the client] - whichever comes first. > > Cheers, > Rob.