How to Round a PHP String to Two Decimal Places?

Rounding a Number to Two Decimal Places in PHP

In this snippet, we aim to round a PHP string to two decimal places to format it properly for output. To achieve this, we could utilize a custom function named round_to_2dp().

The function definition should be as follows, employing the number_format() function:

function round_to_2dp($number) {
    return number_format((float)$number, 2, '.', '');
}

Here's an example of its usage:

$number = "520"; // It's a string from a database

$formatted_number = round_to_2dp($number);

echo $formatted_number; // Outputs 520.00

The number_format() function takes three arguments:

1. Number: The value to be formatted.
2. Decimals: The number of decimal places to round to.
3. Decimals Separator: The character used to separate decimal digits.
4. Thousands Separator: The character used to separate thousands.

In this case, we set the decimals argument to 2, specifying two decimal places. The final result is returned as a string.

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