PHP获取毫秒时间戳，php获取毫秒_PHP教程

PHP获取毫秒时间戳，php获取毫秒

我们知道,PHP中time()函数获取的时间戳,其单位是秒.

但是,前端JS获取的时间戳,单位是毫秒. 那么,在实际应用中,如何将JS和PHP的时间戳统一,即如何使用PHP获取毫秒时间戳呢,请看下例: <span class="pun"><span class="pln">php</span></span> <span class="pln">//函数,获取毫秒时间戳</span> <span class="kwd">function<span class="pln"> getMillisecond<span class="pun">()<span class="pln"> <span class="pun">{</span></span></span></span></span> <span class="pln"> list<span class="pun">(<span class="pln">$t1<span class="pun">,<span class="pln"> $t2<span class="pun">)<span class="pln"> <span class="pun">=<span class="pln"> explode<span class="pun">(<span class="str">' '<span class="pun">,<span class="pln"> microtime<span class="pun">());</span></span></span></span></span></span></span></span></span></span></span></span></span></span> <span class="pln"> <span class="kwd">return<span class="pln"> <span class="pun">(<span class="kwd">float<span class="pun">)<span class="pln">sprintf<span class="pun">(<span class="str">'%.0f'<span class="pun">,<span class="pln"> <span class="pun">(<span class="pln">floatval<span class="pun">(<span class="pln">$t1<span class="pun">)<span class="pln"> <span class="pun">+<span class="pln"> floatval<span class="pun">(<span class="pln">$t2<span class="pun">))<span class="pln"> <span class="pun">*<span class="pln"> <span class="lit">1000<span class="pun">);</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span> <span class="pun">}</span>   <span class="com">//上面的函数是百度出来的,我刚开始看着也不是很明白.</span> <span class="com">//现分开详细讲解如下:</span> <span class="kwd">function<span class="pln"> getMillisecond_new<span class="pun">(){</span></span></span> <span class="pln"> <span class="com">//使用microtime()获取微秒时间戳,格式(中间空格隔开):'秒的小数部分 秒的整数部分',例如'0.69718900 1420440552'</span></span> <span class="pln"> <span class="com">//将微秒字符串explode炸开,接收$t1=0.69718900 $t2=1420440552</span></span> <span class="pln"> list<span class="pun">(<span class="pln">$t1<span class="pun">,<span class="pln"> $t2<span class="pun">)<span class="pln"> <span class="pun">=<span class="pln"> explode<span class="pun">(<span class="str">' '<span class="pun">,<span class="pln"> microtime<span class="pun">());</span></span></span></span></span></span></span></span></span></span></span></span></span></span> <span class="pln"> <span class="com">//转成浮点数</span></span> <span class="pln"> $t1<span class="pun">=<span class="pln">floatval<span class="pun">(<span class="pln">$t1<span class="pun">);</span></span></span></span></span></span> <span class="pln"> $t2<span class="pun">=<span class="pln">floatval<span class="pun">(<span class="pln">$t2<span class="pun">);</span></span></span></span></span></span> <span class="pln"> <span class="com">//相加×1000</span></span> <span class="pln"> $total<span class="pun">=(<span class="pln"> $t1<span class="pun">+<span class="pln"> $t2<span class="pun">)<span class="pln"> <span class="pun">*<span class="pln"> <span class="lit">1000<span class="pun">;</span></span></span></span></span></span></span></span></span></span></span> <span class="pln"> <span class="com">//四舍五入</span></span> <span class="pln"> $total<span class="pun">=<span class="pln">round<span class="pun">(<span class="pln">$total<span class="pun">,<span class="lit">0<span class="pun">);</span></span></span></span></span></span></span></span> <span class="pln"> <span class="com">//返回结果</span></span> <span class="pln"> <span class="kwd">return<span class="pln"> $total<span class="pun">;</span></span></span></span> <span class="pun">}</span> <span class="pln">echo getMillisecond<span class="pun">(),<span class="str">" PHP毫秒-getMillisecond()<br>"<span class="pun">;</span></span></span></span> <span class="pln">echo getMillisecond_new<span class="pun">().<span class="str">' PHP毫秒-getMillisecond_new()'<span class="pun">;</span></span></span></span> <span class="com">/*</span> <span class="com"> * 思路:</span> <span class="com"> * 1.使用microtime()获取微秒时间戳,格式:0.69718900 1420440552</span> <span class="com"> * 2.前后两部分相加×1000,然后四舍五入round($float,0)</span> <span class="com"> * 秒time()-->毫秒-->微秒microtime(),两两之间是1000进制</span> <span class="com"> * 这样,就可以与前端JS的时间戳保持一致</span> <span class="com"> * JS : new Date().getTime()获得毫秒时间戳</span> <span class="com"> */</span> <span class="pun">?></span> <span class="pun">DOCTYPE HTML PUBLIC <span class="str">"-//W3C//DTD HTML 4.01 Transitional//EN"</span></span>> <span class="pln"></span>> <span class="pln"></span>> <span class="pln"><meta http class="pun">-<span class="pln">equiv<span class="pun">=<span class="str">"Content-Type"<span class="pln"> content<span class="pun">=<span class="str">"text/html; charset=utf-8"</span></span></span></span></span></span></span>> <span class="pln"><title><span class="pln">time/<span class="pln">title</span></span></title></span>> <span class="pun"><span class="pln">head</span></span>> <span class="pln"></span>> <span class="pln"><br class="pun">/</span>> <span class="pln"><script></script></span>> <span class="kwd">var<span class="pln"> time<span class="pun">=<span class="kwd">new<span class="pln"> <span class="typ">Date<span class="pun">();</span></span></span></span></span></span></span> <span class="kwd">var<span class="pln"> mtime<span class="pun">=<span class="pln">time<span class="pun">.<span class="pln">getTime<span class="pun">();</span></span></span></span></span></span></span> <span class="pln">document<span class="pun">.<span class="pln">write<span class="pun">(<span class="pln">mtime<span class="pun">+<span class="str">' JS获得毫秒时间戳'<span class="pun">);</span></span></span></span></span></span></span></span> <span class="pun"><span class="pln">script</span></span>> <span class="pun"><span class="pln">body</span></span>> <span class="pun"><span class="pln">html</span></span>> 运行结果如下: <span class="lit">1424069168633<span class="pln"> PHP毫<span class="pun">秒-<span class="pln">getMillisecond<span class="pun">()</span></span></span></span></span> <span class="lit">1424069168633<span class="pln"> PHP毫<span class="pun">秒-<span class="pln">getMillisecond_new<span class="pun">()</span></span></span></span></span> <span class="lit">1424069168643<span class="pln"> JS<span class="pun">获得毫秒时间戳</span></span></span> 可以看出,第三个时间戳数值稍微比前两个大,这是代码运行所消耗的时间,是正常的.

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