The phpnumber_format () function uses a thousand-bit grouping to format the implementation code of numbers.

The following is a detailed analysis of the implementation code of the numberformat () function in php that uses a thousand-bit grouping to format numbers. For more information, see Definition and usage
The number_format () function uses a thousand-bit grouping to format numbers.

Syntax
Number_format (number, decimals, decimalpoint, separator)

Parameter description
Number is required. The number to be formatted. If no other parameter is set, the number is formatted as a comma (,) without a decimal point.

Optional. Specifies the number of decimal places. If this parameter is set, the period (.) is used as the decimal point to format the number.

Decimalpoint is optional. Specifies the string used as the decimal point.

Optional. A string that is required to be used as a thousands separator. Use only the first character of this parameter. For example, "xyz" only outputs "x ".
Note: If this parameter is set, all other parameters are required.

Tips and comments
Note: This function supports one, two, or four parameters (not three ).

Example:
The code is as follows:
Echo number_format ("1000000 ");
Echo number_format ("1000000", 2 );
Echo number_format ("1000000", 2 ,",",".");
?>

Output:
The code is as follows:
1,000,000
1,000,000.00
1.000.000, 00