# 第三课 日期时间 ``` <pre class="calibre18">``` $today <span class="token">=</span> <span class="token1">strtotime</span><span class="token2">(</span><span class="token1">date</span><span class="token2">(</span><span class="token4">"Y-m-d"</span><span class="token2">,</span><span class="token1">time</span><span class="token2">(</span><span class="token2">)</span><span class="token2">)</span><span class="token2">)</span><span class="token2">;</span><span class="token6">//今天 2018-11-11 00:00:00</span> $startday <span class="token">=</span> <span class="token1">strtotime</span><span class="token2">(</span><span class="token1">date</span><span class="token2">(</span><span class="token4">'Y-m-01'</span><span class="token2">)</span><span class="token2">)</span><span class="token2">;</span> <span class="token6">//本月初 2018-11-01 00:00:00</span> $endday <span class="token">=</span> <span class="token1">strtotime</span><span class="token2">(</span><span class="token1">date</span><span class="token2">(</span><span class="token4">'Y-m'</span><span class="token2">)</span> <span class="token2">.</span> <span class="token4">'-'</span> <span class="token2">.</span> <span class="token1">date</span><span class="token2">(</span><span class="token4">'t'</span><span class="token2">,</span><span class="token1">time</span><span class="token2">(</span><span class="token2">)</span><span class="token2">)</span><span class="token2">.</span><span class="token4">" 23:59:59"</span><span class="token2">)</span><span class="token2">;</span> <span class="token6">//本月末</span> ``` ```