How to use php number_format function?

The number_format function is a built-in function in PHP, used to format a number containing thousands of groups. Its syntax is "string number_format ($number, $decimals, $decimalpoint, $sep)".

This article mainly introduces how to use php number_format. I hope it will be helpful to friends in need!

number_format() function is a built-in function in PHP, used to format a number containing thousands of groups. It returns the formatted number on success, otherwise gives E_WARNING on failure.

Syntax:

string number_format ( $number, $decimals, $decimalpoint, $sep )

Parameters:

This function accepts the above four parameters, as described below:

$number: It is a required parameter to specify the number to be formatted. If no other parameters are set, the number will be formatted without decimals and using a comma (,) as the thousands separator. The required argument specifies the number to be formatted.

$decimals: It is an optional parameter used to specify decimals. If this parameter is set, the number will be formatted using a period (.) as the decimal point.

$decimalpoint: It is an optional parameter that specifies the string to be used for the decimal point.

$sep: It is an optional parameter that specifies the string used for thousands separator. If this parameter is given, all other parameters are required.

Return value:

Returns a formatted number on success, and returns E_WARNING on failure.

number_format() code example 1:

<?php 
$num1 = "999999.49"; 
  
// 没有小数点参数 
echo number_format($num1)."\n"; 
  
// 带小数点参数 
echo number_format($num1, 3)."\n"; 
   
$num2 = "9999999.99"; 
  
// 没有小数点参数
//返回整数值
echo number_format($num2)."\n"; 
  
//带小数点参数
echo number_format($num2, 3)."\n";  
  
// 包含所有四个参数
echo number_format("1000000.99", 3, "#", "GGG"); 
  
   
?>

Output:

999,999
999,999.490
10,000,000
9,999,999.990
1GGG000GGG000#990

number_format() code example 2:

If you pass anything other than a number, it will give a warning.

<?php 
$num = "GFG"; 
  
echo number_format($num)."\n\n"; 
  
echo number_format($num, 3); 
   
?>

Output:

PHP Warning:  number_format() expects parameter 1 to be float,
string given in /home/ac476aaecea758334cb8ed146bcbb8f6.php on line 5

PHP Warning:  number_format() expects parameter 1 to be float, 
string given in /home/ac476aaecea758334cb8ed146bcbb8f6.php on line 8

number_format() code example 3:

This function does not accept three parameters, only 1, 2 or 4 parameters.

<?php 
$num = 1000000; 
  
echo number_format($num, 3, ", "); 
?>

Output:

PHP Warning:  Wrong parameter count for number_format() 
in /home/e426108b066d9a86366249bf7b626d19.php on line 6

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