Checks if the current position in the cursor is valid

# MongoDB\Driver\Cursor::valid

(mongodb >=1.9.0)

MongoDB\Driver\Cursor::valid — Checks if the current position in the cursor is valid

### 说明

public function MongoDB\Driver\Cursor::valid(): bool

### 参数

此函数没有参数。

### 返回值

`true` if the current cursor position is valid, `false` otherwise.

### 参见

- Iterator::valid() - 检查当前位置是否有效

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