Detailed explanation of digital functions in php

This article mainly shares with you the detailed explanation of PHP's digital functions. It mainly explains it in the form of code. I hope it can help you.

Rounding

floor(值)     向下取整

ceil(值)      向上取整

Power operation

pow(底数，指数)

Example

// 输出2的3次方
echo pow(2,3);   // 8

Square root

sqrt(数字)

Example

//输出4的平方根
echo sqrt(4);  // 2

Random number

rand(start,end)      比较慢，而且有

mt_rand(start,end)   推荐使用，性能好

Number formatting

number_format(数字(,小数位数))

If only numbers are passed in, decimals will not be retained and ## will be added to the thousands place. #, are used as delimiters.

Example

// 格式化
$x = 6789.123;

echo number_format($x);   // 6,789
echo &#39;<br/>&#39;;
echo number_format($x,2); // 6,789.12
echo &#39;<hr/>&#39;;

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