09-29-2011
You will need a cluster for such actions.
Think about it, you upgrade and something goes wrong ?
Your service will be down during the time you are restoring backup.
With cluster and proper backup, you can safely upgrade with service being up all the time (this to some extent depends of the service itself.)
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LEARN ABOUT PHP
apache_response_headers
APACHE_RESPONSE_HEADERS(3) 1 APACHE_RESPONSE_HEADERS(3)
apache_response_headers - Fetch all HTTP response headers
SYNOPSIS
array apache_response_headers (void )
DESCRIPTION
Fetch all HTTP response headers.
RETURN VALUES
An array of all Apache response headers on success or FALSE on failure.
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.5.7 | |
| | |
| | This function became available in the CLI |
| | server. |
| | |
| 5.4.0 | |
| | |
| | This function became available under FastCGI. |
| | Previously, it was supported when PHP was |
| | installed as an Apache module or by the NSAPI |
| | server module in Netscape/iPlanet/SunONE web- |
| | servers. |
| | |
+--------+---------------------------------------------------+
EXAMPLES
Example #1
apache_response_headers(3) example
<?php
print_r(apache_response_headers());
?>
The above example will output something similar to:
Array
(
[Accept-Ranges] => bytes
[X-Powered-By] => PHP/4.3.8
)
SEE ALSO
apache_request_headers(3), headers_sent(3), headers_list(3).
PHP Documentation Group APACHE_RESPONSE_HEADERS(3)