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PHP number_format() 函数

Jun 23, 2016 pm 02:34 PM

简介:这是PHP number_format() 函数的详细页面,介绍了和php,php, number, format, round PHP number_format() 函数有关的知识、技巧、经验,和一些php源码等。

class='pingjiaF' frameborder='0' src='http://biancheng.dnbcw.info/pingjia.php?id=351508' scrolling='no'> 格式化数字 函数number_format  和 round
number_format() 函数通过千位分组来格式化数字。
语法:number_format(number,decimals,decimalpoint,separator)
参数                            描述
number                   必需。要格式化的数字。如果未设置其他参数,则数字会被格式化为不带小数点且以逗号 (,) 作为分隔符。
decimals                   可选。规定多少个小数。如果设置了该参数,则使用点号 (.) 作为小数点来格式化数字。
decimalpoint           可选。规定用作小数点的字符串。
separator                   可选。规定用作千位分隔符的字符串。仅使用该参数的第一个字符。比如 "xyz" 仅输出 "x"。
注释:如果设置了该参数,那么所有其他参数都是必需的。
提示和注释
注释:该函数支持一个、两个或四个参数(不是三个)。

<?phpecho number_format("1000000");echo number_format("1000000",2);echo number_format("1000000",2,",",".");?>
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round() 函数对浮点数进行四舍五入。
语法:round(x,prec)
参数                                  描述
x                                  可选。规定要舍入的数字。
prec                                  可选。规定小数点后的位数。
说明:    返回将 x 根据指定精度 prec (十进制小数点后数字的数目)进行四舍五入的结果。prec 也可以是负数或零(默认值)。
注释:PHP 默认不能正确处理类似 "12,300.2" 的字符串。

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