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# MongoCursor::doQuery

(No version information available, might only be in SVN)

MongoCursor::doQuery — Execute the query.

### Beschreibung

protected void MongoCursor::doQuery ( void )
Warnung

Please do not use me.

This function actually queries the database. All queries and commands go through this function. Thus, this function can be overridden to provide custom query handling.

This handles serializing your query, sending it to the database, receiving a response, and deserializing it. Thus, if you are planning to override this, your code should probably call out to the original to use the existing functionality (see the example below).

### Parameter-Liste

Diese Funktion hat keine Parameter.

### Rückgabewerte

`NULL`.

### Fehler/Exceptions

Throws MongoConnectionException if it cannot reach the database.

### Changelog

Version | Beschreibung
--- | ---
1.2.11 | Emits `E_DEPRECATED` when used.

### Beispiele

Beispiel #1 MongoCursor::doQuery() example

You could override this function to attempt a query on a secondary and, if that fails, try it again on the primary.

`<?php
class MyCursor extends MongoCursor {
protected function doQuery() {
$this->slaveOkay();
try {
MongoCursor::doQuery();
}
catch(MongoCursorException $e) {
$this->slaveOkay(false);
MongoCursor::doQuery();
}
}
}
?>`

MongoCursor::dead
MongoCursor::explain
MongoCursor
PHP Manual