Adds a field to User Fields Parameter (uf)

# SolrDisMaxQuery::addUserField

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SolrDisMaxQuery::addUserField — Adds a field to User Fields Parameter (uf)

### 说明

public function SolrDisMaxQuery::addUserField(string `$field`): SolrDisMaxQuery

Adds a field to The User Fields Parameter (uf)

### 参数

`field`

  Field Name

### 返回值

SolrDisMaxQuery

### 示例

示例 #1 SolrDisMaxQuery::addUserField() example

    <?php

    $dismaxQuery = new SolrDisMaxQuery('lucene');
    $dismaxQuery
    ->addUserField('cat')
    ->addUserField('text')
    ->addUserField('*_dt');

    echo $dismaxQuery.PHP_EOL;

    ?>

以上示例的输出类似于：

    q=lucene&defType=edismax&uf=cat text *_dt

### 参见

- SolrDisMaxQuery::removeUserField() - Removes a field from The User Fields Parameter (uf)
- SolrDisMaxQuery::setUserFields() - Sets User Fields parameter (uf)

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