This article mainly introduces the usage and description of PHP function microtime (). If you need it, you can refer to the definition and usage.
The PHP function microtime () returns the current Unix timestamp and the number of microseconds.
PHP function microtime () syntax
Microtime (get_as_float)
PHP function microtime () parameter and description
If the get_as_float parameter is given and its value is equivalent to TRUE, this function returns a floating point number.
Description
The PHP function microtime () is only available in the operating system that supports the gettimeofday () system call.
If no optional parameter is required, this function returns a string in the format of "msec sec", where sec is the current number of seconds since the Unix epoch (0:00:00 January 1, 1970 GMT, msec is in microseconds. The two parts of the string are returned in seconds.
Example
The code is as follows:
Echo (microtime (); // 0.25139300 1138197510
The PHP function microtime () is generally used as follows:
The code is as follows:
$ Mtime = explode ('', microtime ());
$ StartTime = $ mtime [1] + $ mtime [0];
Echo $ startTime; // 1385976275.33
