GMP gmp_init(mixed $number[, int $base = 0])
Creates a GMP number from an integer or string.
A GMP number resource in PHP 5.5 and earlier, or a GMP object in PHP 5.6 and later.
- mixed $number: An integer or a string. The string representation can be decimal, hexadecimal or octal.
- int $base [ = 0]: The base.
The base may vary from 2 to 36. If base is 0 (default value), the actual base is determined from the leading characters: if the first two characters are 0x or 0X, hexadecimal is assumed, otherwise if the first character is "0", octal is assumed, otherwise decimal is assumed.
Example #1 Creating GMP number
$a = gmp_init(123456);
$b = gmp_init("0xFFFFDEBACDFEDF7200");
- To use the extended base introduced in PHP 5.3.2, then PHP must be compiled against GMP 4.2.0 or greater.
- It is not necessary to call this function in order to use integers or strings in place of GMP numbers in GMP functions (such as with gmp_add()). Function arguments are automatically converted to GMP numbers, if such conversion is possible and needed, using the same rules as gmp_init().