round a number to the nearest ten thousandth in php

To round a number to the nearest ten thousandth (4 decimal places), you can use the round() function in PHP with the precision parameter set to 4. Here's an example:

main.php
$num = 123.456789;
$rounded = round($num, 4);
echo $rounded; // output: 123.4568
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4 lines

In the example above, the round() function takes the $num variable and rounds it to 4 decimal places, resulting in 123.4568.

If you want to format the rounded number with commas for thousands separators, you can use the number_format() function:

main.php
$num = 1234567.89;
$rounded = round($num, 4);
$formatted = number_format($rounded, 4);
echo $formatted; // output: 1,234,567.8900
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5 lines

In this example, the number_format() function formats the rounded number with 4 decimal places and commas for thousands separators, resulting in 1,234,567.8900.