How to Add Leading Zeros to Numbers in PHP?

Formatting Numbers with Leading Zeros in PHP

Question:

Given a variable containing a numeric value, such as 1234567, how can it be formatted to have a specific number of digits, ensuring any missing digits are filled with leading zeros?

Answer:

PHP provides several functions for this purpose:

sprintf:

sprintf('%08d', 1234567); // 01234567

The d format specifier indicates that the number will be padded with leading zeros as needed to achieve a total length of 8 characters.

str_pad:

str_pad($value, 8, '0', STR_PAD_LEFT); // 01234567

The str_pad function allows you to pad a string with a specified number of characters from either the left or the right. The STR_PAD_LEFT option ensures that the leading zeros are added to the left of the value.

For example, using the given value of 1234567:

$paddedValue = sprintf('%08d', 1234567); // 01234567

$paddedValue will now contain the formatted string with 8 digits, including leading zeros.

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