php 获取当前时间的毫秒数程序代码
在php中获取时间日期我们可以使用date函数,如果获取毫秒可以使用time但不能具体分出来,下面我来介绍一些php获取当前时间毫秒的实例。
php本身没有提供返回毫秒数的函数,但提供了一个microtime()函数,该函数返回一个array,包含两个元素,一个是秒数,一个是小数表示的毫秒数,借助此函数,可以很容易定义一个返回毫秒数的函数,例如:
代码如下 | 复制代码 |
function getMillisecond() { |
需要注意,在32位系统中php的int最大值远远小于毫秒数,所以不能使用int类型,而php中没有long类型,所以只好使用浮点数来表示。由于使用了浮点数,如果精度设置不对,使用echo显示获取的结果时可能会不正确,要想看到输出正确的结果,精度设置不能低于13位。
代码如下 | 复制代码 |
/* * microsecond 微秒 millisecond 毫秒 *返回时间戳的毫秒数部分 */ function get_millisecond() { list($usec, $sec) = explode(" ", microtime()); $msec=round($usec*1000); return $msec; } /* * *返回字符串的毫秒数时间戳 */ function get_total_millisecond() { $time = explode (" ", microtime () ); $time = $time [1] . ($time [0] * 1000); $time2 = explode ( ".", $time ); $time = $time2 [0]; return $time; } /* * *返回当前 Unix 时间戳和微秒数(用秒的小数表示)浮点数表示,常用来计算代码段执行时间 */ function microtime_float() { list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec); } |
需要注意,在32位系统中php的int最大值远远小于毫秒数,所以不能使用int类型,而php中没有long类型,所以只好使用浮点数来表示。

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