(PHP 5 >= 5.6.1, PHP 7, PHP 8)
gmp_export — Export to a binary string
$num, int $word_size = 1, int $flags = GMP_MSW_FIRST | GMP_NATIVE_ENDIAN): stringExports a GMP number to a binary string. This function can handle arbitrarily large numbers beyond the range of PHP's native integer type, with configurable word size and byte order, similar in spirit to pack().
The sign of the number is ignored; exporting a negative number produces the same result as exporting its absolute value.
numThe GMP number to export.
word_size
The number of bytes per word in the output. The total length of
the returned string will be a multiple of this value.
Default value: 1.
flags
A bitmask controlling word order and byte order. Word order:
GMP_MSW_FIRST (most significant word first,
default) or GMP_LSW_FIRST (least significant
word first). Byte order within each word:
GMP_NATIVE_ENDIAN (default),
GMP_BIG_ENDIAN, or
GMP_LITTLE_ENDIAN.
Default value:
GMP_MSW_FIRST | GMP_NATIVE_ENDIAN.
Returns a string containing the binary representation of the GMP number. The string is empty if the number is zero.
| 版本 | 说明 |
|---|---|
| 8.0.0 |
This function no longer returns false on failure.
|
示例 #1 gmp_export() example
<?php
$number = gmp_init(16705);
echo gmp_export($number) . "\n";
?>以上示例会输出：
AA