함수 zfill()

• leading zero
• leading 0
• ZEROFILL
• fill zero
• Example: 83, 4 → 0083

1 Excel

'0083

="0083"

=TEXT(83,"0000")

=TEXT(83, REPT("0",4))

=REPT("0",4-LEN(A1))&A1

2 PHP

$num = 83;
$zero_num = str_pad($num, 4, '0', STR_PAD_LEFT);
// 0083

function leading_zero($num, $digit) {
  return str_pad($num, $digit, '0', STR_PAD_LEFT); 
}

$num = 83;
$zero_num = leading_zero($num, 4);
// 0083

$num = 83;
$zero_num = sprintf('%04d', $num);
// 0083

3 See also

• removing leading zero
• Trailing zero