PHP | gmp_import() Function

The gmp_import() function is an inbuilt function in php which imports a GMP number(GNU Multiple Precision: For large numbers) from a binary string.

Syntax:

GMP gmp_import ( string $data, int $word_size, int $options )

Parameters: The gmp_import() function accepts three parameters as mentioned above and described below:

• $data: It is one of the required parameters, contains the binary string which is supposed to be imported.
• $word_size: This is also a parameter of the gmp_import() function. It contains the number of bytes in each chunk of binary data. This parameter is mainly used simultaneously with the options parameter. The default value of this parameter is 1.
• $options: This parameter has default value of GMP_MSW_FIRST | GMP_NATIVE_ENDIAN.

Return Value: The function returns a GMP number on success otherwise returns FALSE on failure.

Below programs illustrate the gmp_import() function in PHP:
Program 1:

<?php
// php code implementing gmp_import()
// function

$number = gmp_import("\0");

// The gmp_strval() returns the
// string value of the gmp number
echo gmp_strval($number) . "\n";

?>

Output:

 0

Program 2:

<?php
// php code implementing the
// gmp_import() function

$number = gmp_import("\0\1\2");

// The strval() returns the string
// value of the gmp number
echo gmp_strval($number) . "\n";

?>

Output:

 258

Reference: php.net/manual/en/function.gmp-import.php