
The Correct Way to Round a PHP String to Two Decimal Places
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Rounding numbers to two decimal places is a common requirement when handling financial data or displaying prices. PHP offers two main functions for achieving this: number_format()
and round()
. Here's how you can use them effectively.
✅ Using number_format()
(Recommended for Display)
$number = 12.34567;
$rounded = number_format($number, 2);
echo $rounded; // Output: 12.35
-
number_format($number, 2)
formats the number to two decimal places and returns a string.
✅ Using round()
(For Mathematical Calculations)
$number = 12.34567;
$rounded = round($number, 2);
echo $rounded; // Output: 12.35
-
round($number, 2)
rounds the number to two decimal places and returns a float.
Key Differences
Function | Output Type | Use Case |
---|---|---|
number_format() |
String | For display or UI purposes |
round() |
Float | For mathematical operations |
✅ Conclusion
When precision in calculations is essential, use round()
. For displaying formatted numbers with two decimal places, number_format()
is the ideal choice. By understanding these functions, you can handle PHP rounding effectively in different contexts.