MongoCollection::setSlaveOkay
MongoCollection::__toString
MongoCollection
PHP Manual

# MongoCollection::toIndexString

(PECL mongo >=0.9.0)

MongoCollection::toIndexString — Converts keys specifying an index to its identifying string

### Opis

static protected string MongoCollection::toIndexString ( mixed `$keys` )

### Parametry

`keys`

  Field or fields to convert to the identifying string

### Zwracane wartości

Returns a string that describes the index.

### Przykłady

Przykład #1 MongoCollection::toIndexString() example

This example shows how you can create an index name out of of keys. Because this is a protected (static) method, you need to overload it in a child class first.

`<?php
// Create inheritec 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
?>`

### Zobacz też:

MongoDB core docs on » indexes.

MongoCollection::setSlaveOkay
MongoCollection::__toString
MongoCollection
PHP Manual