dechex | Functions | PHP

Decimal to hexadecimal

Syntax

dechex ( int $number ) : string

Parameters

number

The decimal value to convert. As PHP's integer type is signed, but dechex() deals with unsigned integers, negative integers will be treated as though they were unsigned.

Negative Decimal	Positive Decimal	Hexadecimal
	0	0
	1	1
	2	2
	...	...
	9223372036854775806	7ffffffffffffffe
	9223372036854775807 (largest signed integer)	7fffffffffffffff
-9223372036854775808	9223372036854775808	8000000000000000
...	...	...
-2	18446744073709551614	fffffffffffffffe
-1	18446744073709551615 (largest unsigned integer)	ffffffffffffffff

Return

Hexadecimal string representation of number.

Examples

1

<?

$number = 0;

$return = dechex($number);

echo $return;

?>

2

<?

$number = 1;

$return = dechex($number);

echo $return;

?>

3

<?

$number = 2;

$return = dechex($number);

echo $return;

?>

4

<?

$number = 9223372036854775806;

$return = dechex($number);

echo $return;

?>

7ffffffffffffffe

5

<?

$number = 9223372036854775807;

$return = dechex($number);

echo $return;

?>

7fffffffffffffff

6

<?

$number1 = -9223372036854775808;
$number2 = 9223372036854775808;

$return1 = dechex($number1);
$return2 = dechex($number2);

echo $return1 . PHP_EOL;
echo $return2;

?>

7

<?

$number1 = -2;
$number2 = 18446744073709551614;

$return1 = dechex($number1);
$return2 = dechex($number2);

echo $return1 . PHP_EOL;
echo $return2;

?>

8

<?

$number1 = -1;
$number2 = 18446744073709551615;

$return1 = dechex($number1);
$return2 = dechex($number2);

echo $return1 . PHP_EOL;
echo $return2;

?>

Links

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