zeroise( int $number, int $threshold )

必要时添加前导零。
Add leading zeros when necessary.

目录锚点：#说明#参数#源码#笔记

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说明（Description）

如果将阈值设置为’4’，数字为’10’，则返回’0010’。如果您将阈值设置为’4’，数字为’5000’，那么您将返回’5000’。使用sprintf根据$threshold参数和数字的大小追加0的数量。如果数字足够大，则不会追加零。

参数（Parameters）

源码（Source）

/**
 * Add leading zeros when necessary.
 *
 * If you set the threshold to '4' and the number is '10', then you will get
 * back '0010'. If you set the threshold to '4' and the number is '5000', then you
 * will get back '5000'.
 *
 * Uses sprintf to append the amount of zeros based on the $threshold parameter
 * and the size of the number. If the number is large enough, then no zeros will
 * be appended.
 *
 * @since 0.71
 *
 * @param int $number     Number to append zeros to if not greater than threshold.
 * @param int $threshold  Digit places number needs to be to not have zeros added.
 * @return string Adds leading zeros to number if needed.
 */
function zeroise( $number, $threshold ) {
	return sprintf( '%0' . $threshold . 's', $number );
}

笔记（Notes）

注释数的前导零