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

### 说明

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

### 参数

此函数没有参数。

### 返回值

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

### 错误／异常

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

### 示例

示例 #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());
    }

    ?>

以上示例的输出类似于：

    int(1)

### 参见

- MongoDB\Driver\BulkWrite

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