# SolrInputDocument::merge

(PECL solr >= 0.9.2)

SolrInputDocument::merge — Merges one input document into another

### 说明

public SolrInputDocument::merge(SolrInputDocument `$sourceDoc`, bool `$overwrite` = `true`): bool

Merges one input document into another.

### 参数

`sourceDoc`

  The source document.

`overwrite`

  If this is `true` it will replace matching fields in the destination document.

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。 In the future, this will be modified to return the number of fields in the new document.

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