How to Pad a Number with Leading Zeros in PHP?

How to Pad a Number with Leading Zeros in PHP

When working with numeric data, it can be necessary to ensure that it has a specific number of digits. For instance, you may want a value to have exactly eight digits for display purposes.

Formatting with Leading Zeros

To pad a number with leading zeros in PHP, you can use either the sprintf or str_pad functions:

• sprintf: Use the d format specifier to pad the number to eight digits. For example:

  $number = 1234567;
  $formatted_number = sprintf('%08d', $number);

• str_pad: Use the str_pad function with STR_PAD_LEFT and a padding string of '0' to pad the number to the left with zeros:

  $number = 1234567;
  $formatted_number = str_pad($number, 8, '0', STR_PAD_LEFT);

Both sprintf and str_pad will result in the variable $formatted_number containing the value "01234567".

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