bindec

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Binary to decimal

bindec ( string $binary_string ) : number

binary_string

The binary string to convert. Any invalid characters in binary_string are silently ignored.

Binary	Decimal
0	0
1	1
10	2
...	...
111111111111111111111111111111111111111111111111111111111111110	9223372036854775806
111111111111111111111111111111111111111111111111111111111111111 (63)	9223372036854775807 (largest signed integer)
1000000000000000000000000000000000000000000000000000000000000000	9223372036854775808
...	...
1111111111111111111111111111111111111111111111111111111111111110	18446744073709551614
1111111111111111111111111111111111111111111111111111111111111111 (64)	18446744073709551615 (largest unsigned integer)

The decimal value of binary_string

<?

$binary_string1 = "0";
$binary_string2 = "023456789abcdefghijklmnopqrstuvwxyz";

$return1 = bindec($binary_string1);
$return2 = bindec($binary_string2);

echo $return1 . PHP_EOL;
echo $return2;

?>

0
0

<?

$binary_string = "1";

$return = bindec($binary_string);

echo $return;

?>

1

<?

$binary_string = "10";

$return = bindec($binary_string);

echo $return;

?>

2

<?

$binary_string = "111111111111111111111111111111111111111111111111111111111111110";

$return = bindec($binary_string);

echo $return;

?>

9223372036854775806

<?

$binary_string = "111111111111111111111111111111111111111111111111111111111111111";

$return = bindec($binary_string);

echo $return;

?>

9223372036854775807

<?

ini_set("precision", 19);

$binary_string = "1000000000000000000000000000000000000000000000000000000000000000";

$return = bindec($binary_string);

echo $return;

?>

9223372036854775808

<?

ini_set("precision", 20);

$binary_string = "1111111111111111111111111111111111111111111111111111111111111110";

$return = bindec($binary_string);

echo $return;

?>

18446744073709551616

<?

ini_set("precision", 20);

$binary_string = "1111111111111111111111111111111111111111111111111111111111111111";

$return = bindec($binary_string);

echo $return;

?>

18446744073709551616

PHP