(PECL mongo >=0.9.0)
MongoCollection::remove — Remove records from this collection
$criteria = array()
[, array $options = array()
]] )
criteria
Description of records to remove.
options
Options for remove.
"w"
See WriteConcerns. The default value for MongoClient is 1.
"justOne"
Remove at most one record matching this criteria.
"fsync"
Boolean, defaults to FALSE. Forces the insert to be synced to disk before returning success. If TRUE, an acknowledged insert is implied and will override setting w to 0.
"timeout"
Integer, defaults to MongoCursor::$timeout. If "safe" is set, this sets how long (in milliseconds) for the client to wait for a database response. If the database does not respond within the timeout period, a MongoCursorTimeoutException will be thrown.
"safe"
Deprecated. Please use the WriteConcern w option.
Returns an array containing the status of the removal if the
"w" option is set. Otherwise, returns TRUE.
Fields in the status array are described in the documentation for MongoCollection::insert().
Throws MongoCursorException if the "w" option is set and the write fails.
Throws MongoCursorTimeoutException if the "w" option is set to a value greater than one and the operation takes longer than MongoCursor::$timeout milliseconds to complete. This does not kill the operation on the server, it is a client-side timeout. The operation in MongoCollection::$wtimeout is milliseconds.
| 版本 | 说明 |
|---|---|
| 1.3.0 |
The options parameter no longer accepts a boolean
to signify "justOne". Instead, this now has to be
done with array('justOne' => true).
|
| 1.2.11 |
Emits E_DEPRECATED when
options is scalar.
|
| 1.2.0 | Added "timeout" option. |
| 1.0.11 | Disconnects on "not master" errors if "safe" is set. |
| 1.0.9 |
Added ability to pass integers to the "safe" option, which previously only accepted booleans. Added "fsync" option. The return type was changed to be an array containing error information if the "safe" option is used. Otherwise, a boolean is returned as before. |
| 1.0.5 | Changed second parameter to be an array of options. Pre-1.0.5, the second parameter was a boolean indicating the "safe" option. |
Example #1 MongoCollection::remove() with justOne example
<?php
$radioactive = $db->radioactive;
// count how much more plutonium there is
$remaining = $radioactive->count(array('type' => 94));
$halflife = $remaining/2;
// remove half of it
while ($halflife > 0) {
$radioactive->remove(array('type' => 94), array("justOne" => true));
$halflife--;
}
?>