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hexdec

Description

The hexdec of Math for PHP hexadecimal to decimal.

Syntax

hexdec(
    string $hex_string
): int|float

Parameters

hex_string

The hexadecimal string to convert. Any invalid characters in hex_string are silently ignored.

HexadecimalDecimal
00
11
22
......
7ffffffffffffffe9223372036854775806
7fffffffffffffff9223372036854775807 (largest signed integer)
80000000000000009223372036854775808
......
fffffffffffffffe18446744073709551614
ffffffffffffffff18446744073709551615 (largest unsigned integer)

Return

The decimal representation of hex_string

Examples

1

<?

$hex_string1 = "0";
$hex_string2 = "0ghijklmnopqrstuvwxyz";

$return1 = hexdec($hex_string1);
$return2 = hexdec($hex_string2);

echo $return1 . PHP_EOL
. $return2;

0
0

2

<?

$hex_string = "1";

$return = hexdec($hex_string);

echo $return;

1

3

<?

$hex_string = "2";

$return = hexdec($hex_string);

echo $return;

2

4

<?

$hex_string = "7ffffffffffffffe";

$return = hexdec($hex_string);

echo $return;

9223372036854775806

5

<?

$hex_string = "7fffffffffffffff";

$return = hexdec($hex_string);

echo $return;

9223372036854775807

6

<?

ini_set("precision", 19);

$hex_string = "8000000000000000";

$return = hexdec($hex_string);

echo $return;

9223372036854775808

7

<?

ini_set("precision", 20);

$hex_string = "fffffffffffffffe";

$return = hexdec($hex_string);

echo $return;

18446744073709551616

8

<?

ini_set("precision", 20);

$hex_string = "ffffffffffffffff";

$return = hexdec($hex_string);

echo $return;

18446744073709551616