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dechex

(PHP 4, PHP 5)

dechexDecimal to hexadecimal

Description

string dechex ( int $number )

Returns a string containing a hexadecimal representation of the given unsigned number argument.

The largest number that can be converted is PHP_INT_MAX * 2 + 1 (or -1): on 32-bit platforms, this will be 4294967295 in decimal, which results in dechex() returning ffffffff.

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.

Return Values

Hexadecimal string representation of number.

Examples

Example #1 dechex() example

<?php
echo dechex(10) . "\n";
echo 
dechex(47);
?>

The above example will output:

a
2f

Example #2 dechex() example with large integers

<?php
// The output below assumes a 32-bit platform.
// Note that the output is the same for all values.
echo dechex(-1)."\n";
echo 
dechex(PHP_INT_MAX 1)."\n";
echo 
dechex(pow(232) - 1)."\n";
?>

The above example will output:

ffffffff
ffffffff
ffffffff

See Also

PHP Manual