round(): Rounding off variable values in PHP

$value = 19.875;
echo round($value, 2); // 19.88

$number=25.66745;
echo "The number = ". $number; // 25.66745 
echo "<br>Rounded value of the number = ".round($number,2); // 25.67 
echo "<br>Rounded value of the number = ".round($number); // 26 

Syntax

float round(int|float $num, int $precision = 0, int|RoundingMode $mode = RoundingMode::HalfAwayFromZero)

Positive precision rounds digits after the decimal point; negative precision rounds digits before it.

Use round() when you need a rounded numeric result. Use number_format() when you need a formatted string for display.

Use floor() to move toward negative infinity and ceil() to move toward positive infinity.

The table below compares the default round() behavior with floor() and ceil().

Explicit rounding modes in PHP 8.4+

var_dump(round(2.5, 0, RoundingMode::HalfEven));          // float(2)
var_dump(round(2.5, 0, RoundingMode::HalfAwayFromZero)); // float(3)

Example: Rounding prices

$price = 19.875;
echo round($price, 2);  // Output: 19.88

Example: Negative Precision Rounding

$num = 1246;
echo round($num, -2);  // Output: 1200

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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