# mysqli_stmt::__construct

(PHP 5, PHP 7, PHP 8)

mysqli_stmt::__construct — Constructs a new mysqli_stmt object

### 说明

public mysqli_stmt::__construct(mysqli `$mysql`, ?string `$query` = `null`)

This method constructs a new mysqli_stmt object.

### 参数

`link`

  A valid mysqli object.

`query`

  The query, as a string. If this parameter is `null`, then the constructor behaves identically to mysqli_stmt_init(), otherwise it behaves as per mysqli_prepare().

### 错误／异常

If mysqli error reporting is enabled (`MYSQLI_REPORT_ERROR`) and the requested operation fails, a warning is generated. If, in addition, the mode is set to `MYSQLI_REPORT_STRICT`, a mysqli_sql_exception is thrown instead.

### 更新日志

版本 | 说明
--- | ---
8.0.0 | `query` is now nullable.

### 参见

- mysqli_prepare() - 预处理执行 SQL
- mysqli_stmt_init() - 初始化语句并返回用于 mysqli_stmt_prepare（调用）的对象

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