In PHP, how to print a number with 2 decimals, but

2020-03-26 12:11发布

问题:

I have a basic index.php page with some variables that I want to print in several places - here are the variables:

<?php
  $firstprice = 1.50;
  $secondprice = 3.50;
  $thirdprice = 20;
?>

My challenge is that later in the document, when I print, I get the prices without the second '0' in the price - this is what happens:

<?php print "$firstprice";?> // returns 1.5 - not 1.50!

SO - I know how to do this with JS, but how is this done in PHP 5+? Basically I want to print the second '0' if there is already a decimal, so if the variable is equal to '3', it stays as '3', but if it's equal to '3.5' it converts to display '3.50' with a second '0', etc.

Here's a JS example - what's the PHP equivalent?

JS:

.toFixed(2).replace(/[.,]00$/, ""))

Many thanks!!

回答1:

This is simple and it will also let you tweak the format to taste:

$var = sprintf($var == intval($var) ? "%d" : "%.2f", $var);

It will format the variable as an integer (%d) if it has no decimals, and with exactly two decimal digits (%.2f) if it has a decimal part.

See it in action.

Update: As Archimedix points out, this will result in displaying 3.00 if the input value is in the range (2.995, 3.005). Here's an improved check that fixes this:

$var = sprintf(round($var, 2) == intval($var) ? "%d" : "%.2f", $var);


回答2:

<?php

$number = 1234.56;

// english notation (default)
$english_format_number = number_format($number);
// 1,235

// French notation
$nombre_format_francais = number_format($number, 2, ',', ' ');
// 1 234,56

$number = 1234.5678;

// english notation without thousands seperator
$english_format_number = number_format($number, 2, '.', '');
// 1234.57

?>

more info here http://php.net/manual/en/function.number-format.php



回答3:

You could use

   if (is_float($var)) 
   {
     echo number_format($var,2,'.','');
   }
   else
   {
     echo $var;
   }


回答4:

What about something like this :

$value = 15.2; // The value you want to print

$has_decimal = $value != intval($value);
if ($has_decimal) {
    echo number_format($value, 2);
}
else {
    echo $value;
}


Notes :

  • You can use number_format() to format value to two decimals
  • And if the value is an integer, just display it.


回答5:

you can use number_format():

echo number_format($firstprice, 2, ',', '.');


回答6:

Alternatively way to print

$number = sprintf('%0.2f', $numbers); 
   // 520.89898989 -> 520.89