Description
$number
) : string
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.
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 * 2 + 1)."\n";
echo dechex(pow(2, 32) - 1)."\n";
?>
The above example will output:
ffffffff ffffffff ffffffff
See Also
- hexdec() - Hexadecimal to decimal
- decbin() - Decimal to binary
- decoct() - Decimal to octal
- base_convert() - Convert a number between arbitrary bases
English translation
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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-function.dechex.html
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References
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