How to generate millisecond timestamp in php

The php time function time() generates the seconds of the current time, but in some cases we need to get the current server time and the milliseconds of GMT (Greenwich Mean Time) January 1970 0:00:00, with The same as the currentTimeMilis() function in Java.

Example:

　　public function getCurrentMilis() {
　　　　$mill_time = microtime();　　　　
　　　　$timeInfo = explode(' ', $mill_time);　　　　
　　　　$milis_time = sprintf('%d%03d',$timeInfo[1],$timeInfo[0] * 1000);
　　　　return $time;
　　}

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