Returns the time when the last iteration of the default event loop has started

# Ev::now

(PECL ev >= 0.2.0)

Ev::now — Returns the time when the last iteration of the default event loop has started

### 说明

final public static function Ev::now(): float

Returns the time when the last iteration of the default event loop has started. This is the time that timers( EvTimer and EvPeriodic) are based on, and referring to it is usually faster than calling Ev::time().

### 参数

此函数没有参数。

### 返回值

Returns number of seconds(fractional) representing the time when the last iteration of the default event loop has started.

### 参见

- Ev::nowUpdate() - Establishes the current time by querying the kernel, updating the time returned by Ev::now in the progress

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