时间函数 · PHP学习 · 看云

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# 时间函数 ``` <pre class="calibre29">``` <span class="token4">date_default_timezone_set</span><span class="token3">(</span><span class="token2">'PRC'</span><span class="token3">)</span><span class="token3">;</span> $time1<span class="token1">=</span><span class="token4">date</span><span class="token3">(</span><span class="token2">"Y-m-d H:i:s"</span><span class="token3">,</span><span class="token4">time</span><span class="token3">(</span><span class="token3">)</span><span class="token1">-</span><span class="token6">3600</span><span class="token1">*</span><span class="token6">24</span><span class="token3">)</span><span class="token3">;</span> <span class="token4">print_r</span><span class="token3">(</span>$time1<span class="token3">)</span><span class="token3">;</span><span class="token">//2018-04-26 12:02:15</span> $time2 <span class="token1">=</span> <span class="token4">date</span><span class="token3">(</span><span class="token2">"Y-m-d H:i:s"</span><span class="token3">,</span><span class="token4">strtotime</span><span class="token3">(</span><span class="token2">"-1 day"</span><span class="token3">)</span><span class="token3">)</span><span class="token3">;</span> <span class="token4">print_r</span><span class="token3">(</span>$time2<span class="token3">)</span><span class="token3">;</span><span class="token">//2018-04-26 12:02:15</span> <span class="token">//mktime(时,分,秒,月,日,年);//获得一个日期的时间戳</span> $today_start<span class="token1">=</span> <span class="token4">mktime</span><span class="token3">(</span><span class="token6">0</span><span class="token3">,</span><span class="token6">0</span><span class="token3">,</span><span class="token6">0</span><span class="token3">,</span><span class="token6">4</span><span class="token3">,</span><span class="token6">27</span><span class="token3">,</span><span class="token6">2018</span><span class="token3">)</span><span class="token3">;</span> $time3 <span class="token1">=</span> <span class="token4">date</span><span class="token3">(</span><span class="token2">"Y-m-d H:i:s"</span><span class="token3">,</span>$today_start<span class="token3">)</span><span class="token3">;</span> <span class="token4">print_r</span><span class="token3">(</span>$time3<span class="token3">)</span><span class="token3">;</span><span class="token">//2018-04-27 00:00:00</span> <span class="token">// 当天的零点时间戳</span> $dayBegin <span class="token1">=</span> <span class="token4">strtotime</span><span class="token3">(</span><span class="token4">date</span><span class="token3">(</span><span class="token2">'Y-m-d'</span><span class="token3">,</span> <span class="token4">time</span><span class="token3">(</span><span class="token3">)</span><span class="token3">)</span><span class="token3">)</span><span class="token3">;</span> <span class="token">// 当天的24点时间戳</span> $dayEnd <span class="token1">=</span> $dayBegin <span class="token1">+</span> <span class="token6">24</span> <span class="token1">*</span> <span class="token6">60</span> <span class="token1">*</span> <span class="token6">60</span><span class="token3">;</span> <span class="token">//2016-11-01 00:00:00</span> $todayStart<span class="token1">=</span> <span class="token4">date</span><span class="token3">(</span><span class="token2">'Y-m-d 00:00:00'</span><span class="token3">,</span> <span class="token4">time</span><span class="token3">(</span><span class="token3">)</span><span class="token3">)</span><span class="token3">;</span> <span class="token">//2016-11-01 23:59:59</span> $todayEnd<span class="token1">=</span> <span class="token4">date</span><span class="token3">(</span><span class="token2">'Y-m-d 23:59:59'</span><span class="token3">,</span> <span class="token4">time</span><span class="token3">(</span><span class="token3">)</span><span class="token3">)</span><span class="token3">;</span> ``` ```