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hexdec

PHP function Edit on GitHub ✎

(PHP 4, PHP 5, PHP 7, PHP 8)

Hexadecimal to decimal

Description

hexdec(string $hex_string): int|float

Returns the decimal equivalent of the hexadecimal number represented by the hex_string argument. hexdec() converts a hexadecimal string to a decimal number.

hexdec() will ignore any non-hexadecimal characters it encounters. As of PHP 7.4.0 supplying any invalid characters is deprecated.

Parameters

hex_string: The hexadecimal string to convert

Return Values

The decimal representation of hex_string

Changelog

Version	Description
7.4.0	Passing invalid characters will now generate a deprecation notice. The result will still be computed as if the invalid characters did not exist.

Examples

hexdec() example

php

<?php
var_dump(hexdec("ee")); // prints "int(238)"
var_dump(hexdec("a0")); // prints "int(160)"
?>

hexdec() with Invalid Characters

php

<?php
var_dump(hexdec("See"));  // print "int(238)"
var_dump(hexdec("that")); // print "int(10)"
?>

Notes

Note

The function can convert numbers that are too large to fit into the platforms int type, larger values are returned as float in that case.