Runtime Configuration

The behaviour of these functions is affected by
settings in php.ini.

For further details and definitions of the PHP_INI_* modes, see the
Where a
configuration setting may be set.

Here’s a short explanation of the configuration
directives.

mongo.allow_empty_keys int

Added in version 1.0.11.

If empty strings (“”) should be allowed as key
names. By default, the driver will throw an exception if you
attempt to pass the empty string as a key to the database. It is
extremely easy to do this inavertently by using double quotes with
$-operators, so it is recommended that you leave this setting as
default. However, if you need to save keys that are empty strings,
you can set this option to true and the driver will allow you to
pass empty strings to the database.

mongo.allow_persistent int

If persistent connections are allowed. (Removed in
1.2.0 – all connections are now persistent).

mongo.chunk_size int

The number of bytes-per-chunk. Used in divvying up
GridFS files. This number must be at least 100 less than 4
megabytes (max: 4194204) and it is recommended that it be less than
that.

mongo.cmd
string

A character to be used in place of $ in modifiers
and comparisons.

As it is easy to forget to escape the “$”, you can
also choose your own special character to use instead of ‘$’.
Choose a character that will not occur in your key names, e.g.
“:”:

mongo.cmd = ":"

Then, to do a comparison, for example:

<?php

$query = array( "i" => array( ":gt" => 20, ":lte" => 30 ) );

?>

You can also change it in your code using
ini_set(“mongo.cmd”, “:”). Of course, you can also just
use single quotes or backslash-escape the $.

mongo.default_host string

Default hostname when nothing is passed to the
constructor.

mongo.default_port string

The default TCP port number to use when connecting
to the database server if no other port is specified. The
database’s default is 27017.

mongo.is_master_interval int

Added in version 1.2.10.

For replicaset connections: The minimum interval
with which the driver will send “isMaster” requests to the MongoDB
server. If the value is lower, there will be more requests, but the
driver finds faster whether the topology of the replicaset has been
changed.

mongo.long_as_object int

Return a BSON_LONG as an instance of MongoInt64 (instead
of a primitive type).

mongo.native_long int

The default behavior for this
has been changed to TRUE in 1.5.0, so
make sure to set this variable to the value you want (probably
TRUE) so that the driver’s behavior
doesn’t suddenly change when you upgrade.

On 64-bit platforms, the mongo.native_long
setting allows for 64-bit integers to be stored in MongoDB. If it
is not set, only 32-bits of the integer will be saved. The MongoDB
data type that is used in this case is the BSON LONG, instead of
the BSON INT that is used if this setting is turned off.

The setting also changes the way how BSON LONGs
behave when they are read back from MongoDB. Without
mongo.native_long enabled, the driver would convert every
BSON LONG to a PHP double which can result in a loss of
precision.

On 32-bit platforms, the mongo.native_long
setting changes nothing for storing integers in MongoDB: the
integer is stored as a BSON INT as before. However, when the
setting is enabled and a BSON LONG is read from MongoDB a MongoCursorException is thrown alerting you that
the data could not be read back without losing precision.

On 32-bit systems especially, it is recommended
that you combine this with enabling
mongo.long_as_object.

mongo.ping_interval int

Added in version 1.2.10.

For replicaset connections: The minimum interval
with which the driver will send “ping” requests to the MongoDB
server. If the value is lower, there will be more pings, but the
driver finds faster whether a node is no longer reachable from the
replicaset.

mongo.utf8
int

If an exception should be thrown for non-UTF8
strings. Until version 1.0.4, the PHP driver would ignore non-UTF8
strings, even though you’re not supposed to insert them. As of
1.0.4, the driver throws a MongoException. To ease the transition for
applications that insert non-UTF8 strings, you can turn this option
off to emulate the old, non-exception-throwning behavior. This
option will be eliminated and exceptions always thrown for non-UTF8
strings starting with version 1.1.0.