must be a multiple of argument #2 ($word_size)

Description

The second option of gmp_import() configures the number of bytes to take in the string to build the number. Each GMP digit will be read over $word_size characters. When the string has a length that is not a multiple of the size of each word, GMP will run short of a few bytes, and emits the error.

Example

<?php
gmp_import('aa', 3);
?>

Literal Examples

  • Argument #1 ($data) must be a multiple of argument #2 ($word_size)

Solutions

  • Check that the string length is a multiple of the 2nd argument of gmp_import().

  • Use a word length that is a factor of the string length.

  • Use a word length of 1, which works all the time, yet may not yield the expected result.

Changed Behavior

This error may appear following an evolution in behavior, in previous versions. See ` <https://php-changed-behaviors.readthedocs.io/en/latest/behavior/.html>`_.