A detailed explanation of PHP's numerical functions

This article is mainly to share with you the PHP digital function in detail, mainly and everyone in the form of code to explain, hope to help everyone.

Take the whole

Floor (value) rounding     down Ceil (value)      upward rounding

Power operation

Pow (base, index)

Example

Output 2 of the 3-Time square echo pow (2,3);   8

Square root

sqrt (digital)

Example

The square root of the output 4 echo sqrt (4);  2

Random number

Rand (Start,end)      is slow and Mt_rand (start,end)   recommended, good performance

Digital formatting

Number_format (number (, number of decimal digits))

Only numbers are passed in, and decimals are not preserved, and they are added as separators at the location of thousands , .

Example

Formatted $x = 6789.123;echo Number_format ($x);   6,789echo ' <br/> '; Echo Number_format ($x, 2); 6,789.12echo '