MongoCollection::toIndexString
(PECL mongo >=0.9.0)
MongoCollection::toIndexString — Converts keys specifying an index to its identifying string
说明
Warning
This method is deprecated since version 1.5.0.
参数
-
keys -
Field or fields to convert to the identifying string
返回值
Returns a string that describes the index.
范例
Example #1 MongoCollection::toIndexString() example
This example shows how you can create an index name out of keys. Because this is a protected (static) method, you need to overload it in a child class first.
<?php
// Create inherited class to make the method "public".
class MyCollection extends MongoCollection
{
static public function toIndexString($a)
{
return parent::toIndexString($a);
}
}
echo MyCollection::toIndexString("foo"), "\n";
// Outputs: foo_1
echo MyCollection::toIndexString(array('name' => 1, 'age' => -1)), "\n";
// Outputs: name_1_age_-1
?>
参见
MongoDB core docs on » indexes.
更新日志
| 版本 | 说明 |
|---|---|
| 1.5.0 | This method has been deprecated. |
