Returns the index of the write operation corresponding to this WriteError

# MongoDB\Driver\WriteError::getIndex

(mongodb >=1.0.0)

MongoDB\Driver\WriteError::getIndex — Returns the index of the write operation corresponding to this WriteError

### Description

final public MongoDB\Driver\WriteError::getIndex(): int

### Parameters

This function has no parameters.

### Return Values

Returns the index of the write operation (from MongoDB\Driver\BulkWrite) corresponding to this WriteError.

### Errors/Exceptions

- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.

### Examples

Example #1 MongoDB\Driver\WriteError::getIndex() example

`<?php
$manager = new MongoDB\Driver\Manager;
$bulk = new MongoDB\Driver\BulkWrite;
$bulk->insert(['_id' => 1]);
$bulk->insert(['_id' => 1]);
try {
$manager->executeBulkWrite('db.collection', $bulk);
} catch(MongoDB\Driver\Exception\BulkWriteException $e) {
var_dump($e->getWriteResult()->getWriteErrors()[0]->getIndex());
}
?>`

The above example will output something similar to:

    int(1)

### See Also

- MongoDB\Driver\BulkWrite

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