PHP Float with 2 Decimal Places: .00

Show a number to two decimal places

You 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.

PHP float with 2 decimal places: .00

A float doesn't have 0 or 0.00 : those are different string representations of the internal (IEEE754) binary format but the float is the same.

If you want to express your float as "0.00", you need to format it in a string, using number_format :

$numberAsString = number_format($numberAsFloat, 2);

php Determine a float variable has two decimal places

Everybody is dancing around the fact that floating point numbers don't have a number of decimal places in their internal representation. i.e. in float 100 == 100.0 == 100.00 == 100.000 and are all represented by the same number, effectively 100 and is stored that way.

The number of decimal places in this example only has a context when the number is represented as a string. In which case any string function that counts the number of digits trailing the decimal point could be used to check.

PHP: Round a number upto 2 decimal places and if the number is a whole number then add trailing zeros

You can try like this:

sprintf("%0.2f",$number);

Check sprintf

or try like this:

$rounded_value = number_format($number,2);

Check number_format

Remove trailing zeros until 2 decimals in PHP

You can use float casting

echo (float) 11.2200;
echo "<br/>";
echo (float) 11.2000;
echo "<br/>";
echo (float) 11.2340;

and you have to check number of digits after decimal point and than get value like below :

$val=(float) 11.2000;
if(strlen(substr(strrchr($val, "."), 1))<2){
    echo number_format($val,2);
}

Casting a value into FLOAT in PHP loses the decimal points. Basically turning the value into an INT

Install proper locale settings on your machine. Probably you have installed IT (Italy) locale file and there is , as a decimal separator so casting doesn't "see" that you pass it float number.

setlocale(LC_ALL, 'en-US.utf8');

But it's not sufficient to type this line into your code. You must also install locale file.
More info: PHP setlocale has no effect

Round with 0 decimal point

round() function omits last digit zero so better use the number_format() function.

eg:

round($No,2)    //your code.

change this function to like below

eg:

number_format($No, 2);

I hope it will help you.

PHP7.1 json_encode() Float Issue

This drove me nuts for a bit until I finally found this bug which points you to this RFC which says

Currently json_encode() uses EG(precision) which is set to 14. That means that 14 digits at most are used for displaying (printing) the number. IEEE 754 double supports higher precision and serialize()/var_export() uses PG(serialize_precision) which set to 17 be default to be more precise. Since json_encode() uses EG(precision), json_encode() removes lower digits of fraction parts and destroys original value even if PHP's float could hold more precise float value.

And (emphasis mine)

This RFC proposes to introduce a new setting EG(precision)=-1 and PG(serialize_precision)=-1 that uses zend_dtoa()'s mode 0 which uses better algorigthm for rounding float numbers (-1 is used to indicate 0 mode).

In short, there's a new way to make PHP 7.1 json_encode use the new and improved precision engine. In php.ini you need to change serialize_precision to

serialize_precision = -1

You can verify it works with this command line

php -r '$price = ["price" => round("45.99", 2)]; echo json_encode($price);'

You should get

{"price":45.99}