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php method to implement rounding without retaining decimals: 1. Round directly through the intval function and discard decimals; 2. Round up through round; 3. Round up through ceil; 4. Through floor Round down.
The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer
How to achieve rounding without retaining in php Decimal?
Four commonly used methods for PHP integer functions:
intval(): round directly, discard decimals, and retain integers;
round(): Round to an integer;
ceil(): Round up, if there are decimals, add 1;
floor(): Round down.
number_format(): Function formats a number by grouping thousands.
intval() integer conversion function
int intval ( mixed $var [, int $base = 10 ] )
Returns the variable var by using the specified base conversion (default is decimal) integer value. intval() cannot be used with object, otherwise an E_NOTICE error will be generated and 1 will be returned.
echo intval(42); // 42 echo intval(4.2); // 4 echo intval('42'); // 42
round() function
round(number,precision,mode);
Rounds floating point numbers.
echo round(42.12123); // 42 echo round(42.62123); // 43 echo round(42.12123, 0); // 42 echo round(42.12123, 2); // 42.12 echo round(4212123, -2); // 421212300
ceil() function further method
Returns the next integer that is not less than value. If value has a decimal part, it will be rounded up by one.
echo ceil(42.12123); // 43 echo ceil(42.62123); // 43
floor() function tail-removing method
Returns the next integer not greater than value, and rounds the decimal part of value.
echo floor(42.12123); // 42 echo floor(42.62123); // 42
number_format() Function
number_format() function formats a number by grouping by thousands.
number_format(number,decimals,decimalpoint,separator);
number: required. The number to format. If no other parameters are set, the number is formatted without a decimal point and with a comma (,) as the thousands separator.
decimals: optional. Specify the number of decimals. If this parameter is set, numbers are formatted using a period (.) as the decimal point.
decimalpoint: optional. Specifies the string used as the decimal point.
separator: optional. Specifies the string used as thousands separator. Only the first character of the parameter is used. For example, "xxx" only outputs "x".
echo number_format("1000000"); // 1,000,000 echo number_format("1000000",2); // 1,000,000.00 echo number_format("1000000",2,",","."); // 1.000.000,00 echo number_format("1000000",2,"*","."); // 1.000.000*00 echo number_format("1000000",2,".",""); // 1000000.00
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