这篇文章主要介绍了PHP获取毫秒级时间戳的方法,涉及php针对microtime函数返回结果的处理技巧,非常简单实用,需要的朋友可以参考下
本文实例讲述了PHP获取毫秒级时间戳的方法。分享给大家供大家参考。具体分析如下:
PHP本身没有提供获取毫秒级时间戳的函数,java里面可以通过gettime();获取。如果是要与java写的某些程序进行高精度的毫秒级的对接通信,则需要使用PHP输出毫秒级的时间。之前我采取的方法是采用不精准的方式,也就是在PHP原生的时间函数后面加上一个三位数字构成。为获取更为精准的毫秒级时间戳可以使用下面的代码:
function getMillisecond() { list($s1, $s2) = explode(' ', microtime()); return (float)sprintf('%.0f', (floatval($s1) + floatval($s2)) * 1000); } /* * 获取时间差,毫秒级 */ function get_subtraction() { $t1 = microtime(true); $t2 = microtime(true); return (($t2-$1)*1000).'ms'; } /* * microsecond 微秒 millisecond 毫秒 *返回时间戳的毫秒数部分 */ function get_millisecond() { list($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); } $millisecond = get_millisecond(); $millisecond = str_pad($millisecond,3,'0',STR_PAD_RIGHT); echo date("YmdHis").$millisecond;
PS: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。
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