date_diff
DateTime::diff的别名 - 返回两个 DateTime 对象之间的差值
计算两个日期间的差值:
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token variable">$date1</span><span class="token operator">=</span><span class="token function">date_create</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"1984-01-28"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token variable">$date2</span><span class="token operator">=</span><span class="token function">date_create</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"1980-10-15"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token variable">$diff</span><span class="token operator">=</span><span class="token function"></span><mark><span class="token function">date_diff</span><span class="token punctuation">(</span><span class="token variable">$date1</span><span class="token punctuation">,</span><span class="token variable">$date2</span><span class="token punctuation">)</span></mark><span class="token punctuation"></span><span class="token punctuation">;</span> <span class="token delimiter important">?></span></span>