Bind prepared statement variables as parameters

# expression

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expression — Bind prepared statement variables as parameters

### 说明

function mysql_xdevapi\expression(string `$expression`): object

警告

本函数还未编写文档，仅有参数列表。

### 参数

`expression`

### 返回值

### 示例

示例 #1 mysql_xdevapi\Expression() example

    <?php
    $expression = mysql_xdevapi\Expression("[age,job]");

    $res  = $coll->find("age > 30")->fields($expression)->limit(3)->execute();
    $data = $res->fetchAll();

    print_r($data);
    ?>

以上示例的输出类似于：

    <?php

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