getservbyportheader_register_callback
(No version information available, might only be in SVN)
header_register_callback — Call a header function
Opis
$callback
)Registers a function that will be called when PHP starts sending output.
The callback is executed just after PHP prepares all
headers to be sent, and before any other output is sent, creating a window
to manipulate the outgoing headers before being sent.
Parametry
-
callback -
Function called just before the headers are sent. It gets no parameters and the return value is ignored.
Zwracane wartości
Zwraca TRUE w przypadku powodzenia, FALSE w
przypadku błędu.
Przykłady
Przykład #1 header_register_callback() example
<?php
header('Content-Type: text/plain');
header('X-Test: foo');
function foo() {
foreach (headers_list() as $header) {
if (strpos($header, 'X-Powered-By:') !== false) {
header_remove('X-Powered-By');
}
header_remove('X-Test');
}
}
$result = header_register_callback('foo');
echo "a";
?>
Powyższy przykład wyświetli coś podobnego do:
Content-Type: text/plain a
Notatki
header_register_callback() is executed just as the headers are about to be sent out, so any output from this function can break output.
Informacja:
Headers will only be accessible and output when a SAPI that supports them is in use.
Zobacz też:
- headers_list() - Returns a list of response headers sent (or ready to send)
- header_remove() - Remove previously set headers
- header() - Send a raw HTTP header
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User Contributed Notes
header_register_callback