wp-includes/functions.php:420Converts float number to format based on the locale.
$numberfloat$decimalsintoptional0stringOne hook fires while number_format_i18n() runs, in this order:
Filters the number formatted based on the locale.
function number_format_i18n( $number, $decimals = 0 ) { global $wp_locale; if ( isset( $wp_locale ) ) { $formatted = number_format( $number, absint( $decimals ), $wp_locale->number_format['decimal_point'], $wp_locale->number_format['thousands_sep'] ); } else { $formatted = number_format( $number, absint( $decimals ) ); } /** * Filters the number formatted based on the locale. * * @since 2.8.0 * @since 4.9.0 The `$number` and `$decimals` parameters were added. * * @param string $formatted Converted number in string format. * @param float $number The number to convert based on locale. * @param int $decimals Precision of the number of decimal places. */ return apply_filters( 'number_format_i18n', $formatted, $number, $decimals );}Introduced in 2.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.