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There are 3 PHP division functions, namely: 1. round function, used to round floating point numbers; 2. ceil function, used to round up to the nearest integer; 3. floor function, used Rounded down to the nearest integer.
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How to divide and round in php (round, ceil, floor)
When encountering a situation where the result of division needs to be rounded in PHP, the following methods need to be used:
1. round: rounding
round() function rounds floating point numbers.
Syntax: round(x, prec)
Parameters
x is optional. Specifies the number to be rounded.
prec Optional. Specifies the number of digits after the decimal point.
Description: Returns the result of rounding x according to the specified precision prec (the number of decimal digits after the decimal point). prec can also be negative or zero (default).
Tip: PHP cannot handle strings like "12,300.2" correctly by default.
Example:
<?php echo(round(0.60)); echo(round(0.50)); echo(round(0.49)); echo(round(-4.40)); echo(round(-4.60)); ?>
Output:
1 1 0 -4 -5
2. ceil: Round up
ceil() function rounds up to the nearest integer.
Syntax: ceil(x)
Parameters
x is required. Specifies the number to be rounded.
Description: Return the next integer that is not less than x. If x has a decimal part, it will be rounded up by one. The type returned by ceil() is still float because the range of float values is usually larger than that of integer.
Example:
<?php echo(ceil(0.60); echo(ceil(0.40); echo(ceil(5); echo(ceil(5.1); echo(ceil(-5.1); echo(ceil(-5.9)); ?>
Output:
1 1 5 6 -5 -5
3. floor: round down
floor() function rounds down to the nearest integer.
Syntax: floor(x)
Parameters
x is required. Specifies the number to be rounded.
Description: Return the next integer not greater than x, and round off the decimal part of x. The type returned by floor() is still float because the range of float values is usually larger than that of integer.
Example:
<?php echo(floor(0.60)); echo(floor(0.40)); echo(floor(5)); echo(floor(5.1)); echo(floor(-5.1)); echo(floor(-5.9)) ?>
Output:
0 0 5 5 -6 -6
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