PHP: show a number to 2 decimal places 

What's the correct way to round a PHP string to 2 decimal places?
$number = "520"; // It's a string from a DB

$formatted_number = round_to_2dp($number);

echo $formatted_number;
Output is "520.00";
How function round_to_2dp() definition should be?

Best Answer : 

 can use number_format():
return number_format((float)$number, 2, '.', '');
Example:
$foo = "105";
echo number_format((float)$foo, 2, '.', '');  // Outputs -> 105.00
This function returns a string.





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