Parameter	Description
number	Required. The number to be formatted. If no other parameters are set, the number will be formatted without decimals and with comma (,) as the thousands separator.
decimals	Optional. Specifies how many decimals. If this parameter is set, the number will be formatted with a dot (.) as decimal point.
decimalpoint	Optional. Specifies what string to use for decimal point.
separator	Optional. Specifies what string to use for thousands separator. Only the first character of separator is used. For example, "xxx" will give the same output as "x". Note: If this parameter is given, all other parameters are required as well.

Tips and Notes

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

Example

<?php
echo number_format("1000000");
echo "<br />";
echo number_format("1000000",2);
echo "<br />";
echo number_format("1000000",2,",",".");
?>

The output of the code above will be:

1,000,000
1,000,000.00
1.000.000,00

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