number_format usage

number_format function is used to format a number in PHP function. This function formats a number into a string with thousands separators and also sets the number of decimal places.

The basic usage is as follows:

string number_format ( float $number , int $decimals = 0 , string $dec_point 
= "." , string $thousands_sep = "," )

The meaning of the parameters is as follows:

$number: the number to be formatted.

$decimals: optional parameter, specifies the number of decimal places to retain. The default value is 0.

$dec_point: Optional parameter, specifying the decimal point character. The default is "." (dot).

$thousands_sep: Optional parameter, specifying the thousands separator character. Default is "," (comma).

Example:

$number = 12345.6789;
echo number_format($number); // 输出：12,346
echo number_format($number, 2, '.', ' '); // 输出：12 345.68

In the above example, the number_format function formats the number and converts it into a band according to the given format parameter. String with thousands separator.

It should be noted that number_format only formats the output string, and the original number has not changed. number_format It is mainly used to display numbers in a user-friendly way, such as in monetary quantities, statistical data, etc.

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