blocks|key|1149773|text|使用microtime。此函数返回由空格分隔的字符串。第一部分是秒的小数部分，第二部分是整数部分。传入true以获取一个数字：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1149774|var_dump(microtime());+++++++//+string(21)+"0.89115400+1283846202"
var_dump(microtime(true));+++//+float(1283846202.89)|code-block|syntax|javascript|1149775|如果您使用microtime(true)，请注意精度损失。|1149776|还有一个将微秒部分作为整数返回的gettimeofday。|1149777|var_dump(gettimeofday());
/*
array(4)+{
++["sec"]=>
++int(1283846202)
++["usec"]=>
++int(891199)
++["minuteswest"]=>
++int(-60)
++["dsttime"]=>
++int(1)
}
*/|1149778|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/manual/en/function.microtime.php|1|http://www.php.net/manual/en/function.gettimeofday.php^0|2|9|1F|4|2|9|0|0|0|5|F|0|G|C|G|C|1|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@$9|15|A|16|1|17]]|E|$]]|$1|F|3|G|5|H|7|18|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|19|8|@$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|1C|8|@$9|1D|A|1E|B|C]]|D|@$9|1F|A|1G|1|1H]]|E|$]]|$1|O|3|P|5|H|7|1I|8|@]|D|@]|E|$I|J]]|$1|Q|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]|Y|$5|T|U|V|E|$W|Z]]]]

Use <a href="http://php.net/manual/en/function.microtime.php" rel="noreferrer"><code>microtime</code></a>. This function returns a string separated by a space. The first part is the fractional part of seconds, the second part is the integral part. Pass in <code>true</code> to get as a number:

<pre><code>var_dump(microtime()); // string(21) "0.89115400 1283846202"
var_dump(microtime(true)); // float(1283846202.89)
</code></pre>

Beware of precision loss if you use <code>microtime(true)</code>.

There is also <a href="http://www.php.net/manual/en/function.gettimeofday.php" rel="noreferrer"><code>gettimeofday</code></a> that returns the microseconds part as an integer.

<pre><code>var_dump(gettimeofday());
/*
array(4) {
 ["sec"]=&gt;
 int(1283846202)
 ["usec"]=&gt;
 int(891199)
 ["minuteswest"]=&gt;
 int(-60)
 ["dsttime"]=&gt;
 int(1)
}
*/
</code></pre>

blocks|key|935470|text|正如其他人所说的，您可以使用microtime()来获取时间戳的毫秒精度。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|935471|从您的评论中，您似乎希望它是一个高精度的UNIX时间戳。类似于.NET世界中的DateTime.Now.Ticks。|935472|您可以使用以下函数来执行此操作：|935473|function+millitime()+{
++$microtime+=+microtime();
++$comps+=+explode('+',+$microtime);

++//+Note:+Using+a+string+here+to+prevent+loss+of+precision
++//+in+case+of+"overflow"+(PHP+converts+it+to+a+double)
++return+sprintf('%25d%2503d',+$comps[1],+$comps[0]+*+1000);
}|code-block|syntax|javascript|935474|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/microtime^0|E|B|E|B|0|0|13|I|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|15|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|16|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

As other have stated, you can use <a href="http://php.net/microtime" rel="noreferrer"><code>microtime()</code></a> to get millisecond precision on timestamps.

From your comments, you seem to want it as a high-precision UNIX Timestamp. Something like <code>DateTime.Now.Ticks</code> in the .NET world.

You may use the following function to do so:

<pre><code>function millitime() {
 $microtime = microtime();
 $comps = explode(' ', $microtime);

 // Note: Using a string here to prevent loss of precision
 // in case of "overflow" (PHP converts it to a double)
 return sprintf('%d%03d', $comps[1], $comps[0] * 1000);
}
</code></pre>

blocks|key|935540|text|在PHP5中使用microtime(true)，或在PHP4中进行以下修改：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|935541|array_sum(explode('+',+microtime()));|code-block|syntax|javascript|935542|编写该代码的一种可移植方法是：|935543|function+getMicrotime()
{
++++if+(version_compare(PHP_VERSION,+'5.0.0',+'<'))
++++{
++++++++return+array_sum(explode('+',+microtime()));
++++}

++++return+microtime(true);
}|935544|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/manual/en/function.microtime.php^0|8|F|8|F|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|13|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

Use <a href="http://php.net/manual/en/function.microtime.php" rel="noreferrer"><code>microtime(true)</code></a> in PHP 5, or the following modification in PHP 4:

<pre><code>array_sum(explode(' ', microtime()));
</code></pre>

A portable way to write that code would be:

<pre><code>function getMicrotime()
{
 if (version_compare(PHP_VERSION, '5.0.0', '&lt;'))
 {
 return array_sum(explode(' ', microtime()));
 }

 return microtime(true);
}
</code></pre>

blocks|key|1149989|text|echo+date('Y-m-d+H:i:s.')+.+gettimeofday()['usec'];|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1149990|输出：|1149991|2016-11-19+15:12:34.346351|1149992|entityMap^0|0|1F|0|0|0|Q|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|K|$]]

<code>echo date('Y-m-d H:i:s.') . gettimeofday()['usec'];</code>

output:

<code>2016-11-19 15:12:34.346351</code>

blocks|key|935681|text|即使您使用的是32位PHP，它也能正常工作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|935682|list($msec,+$sec)+=+explode('+',+microtime());

$time_milli+=+$sec.substr($msec,+2,+3);+//+'1491536422147'
$time_micro+=+$sec.substr($msec,+2,+6);+//+'1491536422147300'|code-block|syntax|javascript|935683|注意这不是给你整数，而是给你字符串。然而，这在很多情况下都工作得很好，例如为REST请求构建URL时。|935684|如果您需要整数，则64位PHP是必需的。|935685|然后，您可以重用上面的代码并转换为(int)：|935686|list($msec,+$sec)+=+explode('+',+microtime());

//+these+parentheses+are+mandatory+otherwise+the+precedence+is+wrong!
//++++++++++++++++++↓++++++++++++++++++++++++↓
$time_milli+=+(int)+($sec.substr($msec,+2,+3));+//+1491536422147
$time_micro+=+(int)+($sec.substr($msec,+2,+6));+//+1491536422147300|935687|或者你可以使用好的老一套的一行代码：|935688|$time_milli+=+(int)+round(microtime(true)+*+1000);++++//+1491536422147
$time_micro+=+(int)+round(microtime(true)+*+1000000);+//+1491536422147300|935689|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

This works even if you are on 32-bit PHP:

<pre><code>list($msec, $sec) = explode(' ', microtime());

$time_milli = $sec.substr($msec, 2, 3); // '1491536422147'
$time_micro = $sec.substr($msec, 2, 6); // '1491536422147300'
</code></pre>

Note this doesn't give you integers, but strings. However this works fine in many cases, for example when building URLs for REST requests.

 
If you need integers, 64-bit PHP is mandatory.

Then you can reuse the above code and cast to (int):

<pre><code>list($msec, $sec) = explode(' ', microtime());

// these parentheses are mandatory otherwise the precedence is wrong!
// ↓ ↓
$time_milli = (int) ($sec.substr($msec, 2, 3)); // 1491536422147
$time_micro = (int) ($sec.substr($msec, 2, 6)); // 1491536422147300
</code></pre>

Or you can use the good ol' one-liners:

<pre><code>$time_milli = (int) round(microtime(true) * 1000); // 1491536422147
$time_micro = (int) round(microtime(true) * 1000000); // 1491536422147300
</code></pre>

blocks|key|935571|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|935572|public+function+getTimeToMicroseconds()+{
++++$t+=+microtime(true);
++++$micro+=+sprintf("%2506d",+($t+-+floor($t))+*+1000000);
++++$d+=+new+DateTime(date('Y-m-d+H:i:s.'+.+$micro,+$t));

++++return+$d->format("Y-m-d+H:i:s.u");+
}|code-block|syntax|javascript|935573|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

try this:

<pre><code>public function getTimeToMicroseconds() {
 $t = microtime(true);
 $micro = sprintf("%06d", ($t - floor($t)) * 1000000);
 $d = new DateTime(date('Y-m-d H:i:s.' . $micro, $t));

 return $d-&gt;format("Y-m-d H:i:s.u"); 
}
</code></pre>

blocks|key|935559|text|$the_date_time+=+new+DateTime($date_string);
$the_date_time_in_ms+=+($the_date_time->format('U')+*+1000)+%2B
++++($the_date_time->format('u')+/+1000);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|935560|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>$the_date_time = new DateTime($date_string);
$the_date_time_in_ms = ($the_date_time-&gt;format('U') * 1000) +
 ($the_date_time-&gt;format('u') / 1000);
</code></pre>

blocks|key|1150151|text|字符串变体的最短版本(32位兼容)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1150152|$milliseconds+=+date_create()->format('Uv');|code-block|syntax|javascript|1150153|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Shortest version of string variant (32-bit compatibile):
<pre><code>$milliseconds = date_create()-&gt;format('Uv');
</code></pre>

blocks|key|1150127|text|这是我的实现，应该也可以在32位上工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1150128|function+mstime(){
++++$mstime+=+explode('+',microtime());
++++return+$mstime[1].''.(int)($mstime[0]*1000);
}|code-block|syntax|javascript|1150129|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is my implementation, should work on 32bit as well.
<pre><code>function mstime(){
 $mstime = explode(' ',microtime());
 return $mstime[1].''.(int)($mstime[0]*1000);
}
</code></pre>

<code>time()</code> is in seconds - is there one in milliseconds?

How to get current time in milliseconds in PHP?

time()是以秒为单位的--有毫秒吗？

问如何在PHP中获取以毫秒为单位的当前时间？
EN

回答 9

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在PHP中获取以毫秒为单位的当前时间？EN

回答 9

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在PHP中获取以毫秒为单位的当前时间？
EN