Home > php教程 > php手册 > PHP取整函数的具体使用方法介绍

PHP取整函数的具体使用方法介绍

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
Release: 2016-06-13 11:08:41
Original
1719 people have browsed it

对于功能强大的ceil -- 进一法取整
说明
float ceil ( float value )
返回不小于 value 的下一个整数,value 如果有小数部分则进一位。ceil() 返回的类型仍然是 float,因为 float 值的范围通常比 integer 要大。

PHP取整函数例子 1. ceil() 例子

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php  </span></span></span></li>
<li><span>echo ceil(4.3); // 5  </span></li>
<li class="alt"><span>echo ceil(9.999); // 10  </span></li>
<li>
<span class="tag">?></span><span>   </span>
</li>
<li class="alt"><span> </span></li>
</ol>
Copy after login


floor -- 舍去法取整
说明
float floor ( float value )
返回不大于 value 的下一个整数,将 value 的小数部分舍去取整。floor() 返回的类型仍然是 float,因为 float 值的范围通常比 integer 要大。

PHP取整函数例子 1. floor() 例子

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php  </span></span></span></li>
<li><span>echo floor(4.3); // 4  </span></li>
<li class="alt"><span>echo floor(9.999); // 9  </span></li>
<li>
<span class="tag">?></span><span>   </span>
</li>
<li class="alt"><span> </span></li>
</ol>
Copy after login


round -- 对浮点数进行四舍五入
说明
float round ( float val [, int precision] )
返回将 val 根据指定精度 precision(十进制小数点后数字的数目)进行四舍五入的结果。precision 也可以是负数或零(默认值)。

PHP取整函数例子 1. round() 例子

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php  </span></span></span></li>
<li><span>echo round(3.4); // 3  </span></li>
<li class="alt"><span>echo round(3.5); // 4  </span></li>
<li><span>echo round(3.6); // 4  </span></li>
<li class="alt"><span>echo round(3.6, 0); // 4  </span></li>
<li><span>echo round(1.95583, 2); // 1.96  </span></li>
<li class="alt"><span>echo round(1241757, -3); // 1242000  </span></li>
<li><span>echo round(5.045, 2); // 5.05  </span></li>
<li class="alt"><span>echo round(5.055, 2); // 5.06  </span></li>
<li>
<span class="tag">?></span><span> </span>
</li>
<li class="alt"><span> </span></li>
</ol>
Copy after login

intval---对变数转成整数型态

PHP取整函数例子intval()

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php  </span></span></span></li>
<li><span>echo intval(4.3); //4  </span></li>
<li class="alt"><span>echo intval(4.6); // 4   </span></li>
<li>
<span class="tag">?></span><span> </span>
</li>
<li class="alt"><span> </span></li>
</ol>
Copy after login


source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Issues
php data acquisition?
From 1970-01-01 08:00:00
0
0
0
PHP extension intl
From 1970-01-01 08:00:00
0
0
0
How to learn php well
From 1970-01-01 08:00:00
0
0
0
Popular Recommendations
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template