PHP microtime () function
PHP Date / Time Reference Manual
Examples
Returns the current number of microseconds Unix timestamp:
<?php
echo(microtime());
?>
echo(microtime());
?>
Running instance »
Definition and Usage
microtime () function returns the current number of microseconds Unix timestamp.
grammar
microtime( get_as_float);
参数 | 描述 |
---|---|
get_as_float | 可选。当设置为 TRUE 时,规定函数应该返回一个浮点数,否则返回一个字符串。默认为 FALSE。 |
technical details
return value: | Default returns the string "microsec sec", where sec is since the Unix Epoch (0:00:00 January 1, 1970 GMT) from the number of seconds, microsec microseconds part. If get_as_float parameter is set to TRUE, it returns a floating point number from Unix epoch accurate to microseconds starting in seconds for the current time. |
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PHP version: | 4+ |
Update log: | PHP 5.0.0: New get_as_float parameters. |
PHP Date / Time Reference Manual