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The use of rounding, rounding up, rounding down, and decimal interception in PHP division operations
- 不言Original
- 2018-04-23 14:42:364945browse
This article mainly introduces the use of rounding, rounding up, rounding down, and decimal interception in PHP division operations. It has a certain reference value. Now I share it with everyone. Friends in need can refer to it
Four commonly used methods for PHP integer functions:
1. Round directly, discard decimals, and retain integers: intval();
2. Rounding to integers: round();
3. Round up and add 1 if there are decimals: ceil();
4. Round down: floor().
1. intval—convert variables into integer types
If intval is a character type, it will be automatically converted to 0. Usually some people use it to force conversion to a numeric type, but you need to pay attention to the situation when the length is too long. Below, it is recommended to use (int).
intval(5.2); // 5
intval(5.6); // 5
intval('abc'); //0
2. Rounding: round()
Round parameter 1 according to the precision specified by parameter 2. Parameter 2 can be negative or zero (default).
round(5.2); // 5 round(5.8); // 6 round(5.88888, 0); // 6 round(5.83333, 2); // 5.83 round(5.83353, 3); // 5.834 round(5201314, -2); //5201300
3. Round up and add 1 if there is a decimal: ceil()
echo(ceil(0.60); //1 echo(ceil(0.40); //1 echo(ceil(5); //5 echo(ceil(5.1); //6 echo(ceil(-5.1); //-5 echo(ceil(-5.9)); //-5
4. Round down: floor()
echo(floor(0.60)); //0 echo(floor(0.40)); //0 echo(floor(5)); //5 echo(floor(5.1)); //5 echo(floor(-5.1)); //-6 echo(floor(-5.9)) //-6
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