General API functions¶
Prototype: function GetLastError()
Returns last error message, as a string, in human readable format. If there were no errors during the previous API call, empty string is returned.
You should call it when any other function (such as Query()) fails (typically, the failing function returns false). The returned string will contain the error description.
The error message is not reset by this call; so you can safely call it several times if needed.
Prototype: function GetLastWarning ()
Returns last warning message, as a string, in human readable format. If there were no warnings during the previous API call, empty string is returned.
You should call it to verify whether your request (such as Query()) was completed but with warnings. For instance, search query against a distributed index might complete successfully even if several remote agents timed out. In that case, a warning message would be produced.
The warning message is not reset by this call; so you can safely call it several times if needed.
Prototype: function SetServer ( $host, $port )
searchd host name and TCP port. All subsequent requests will
use the new host and port settings. Default host and port are
‘localhost’ and 9312, respectively.
Prototype: function SetRetries ( $count, $delay=0 )
Sets distributed retry count and delay.
On temporary failures
searchd will attempt up to
$delay is the delay between the retries, in milliseconds.
Retries are disabled by default. Note that this call will not
make the API itself retry on temporary failure; it only tells
searchd to do so. Currently, the list of temporary failures includes
all kinds of connect() failures and maxed out (too busy) remote agents.
Prototype: function SetConnectTimeout ( $timeout )
Sets the time allowed to spend connecting to the server before giving up.
Under some circumstances, the server can be delayed in responding,
either due to network delays, or a query backlog. In either instance,
this allows the client application programmer some degree of control
over how their program interacts with
searchd when not available,
and can ensure that the client application does not fail due to
exceeding the script execution limits (especially in PHP).
In the event of a failure to connect, an appropriate error code should be returned back to the application in order for application-level error handling to advise the user.
Prototype: function SetArrayResult ( $arrayresult )
PHP specific. Controls matches format in the search results set (whether matches should be returned as an array or a hash).
$arrayresult argument must be boolean. If
false (the default mode), matches will returned in PHP hash format
with document IDs as keys, and other information (weight, attributes) as
$arrayresult is true, matches will be returned as a plain
array with complete per-match information including document ID.
Introduced along with GROUP BY support on MVA attributes. Group-by-MVA result sets may contain duplicate document IDs. Thus they need to be returned as plain arrays, because hashes will only keep one entry per document ID.
Prototype: function IsConnectError ()
Checks whether the last error was a network error on API side, or a remote error reported by searchd. Returns true if the last connection attempt to searchd failed on API side, false otherwise (if the error was remote, or there were no connection attempts at all).