Definition and Usage
The hexdec() function returns a decimal number equivalent of a hexadecimal number embedded in a string.
This function returns a a decimal integer, though larger values may result in floats.
Syntax
hexdec ( string $hex_string ) : number
Parameters
| Sr.No | Parameter & Description |
|---|---|
| 1 | hex_string A decimal number to be converted in equivalent octal representation |
Return Values
PHP hexdec() function returns a decimal number.
PHP Version
This function is available in PHP versions 4.x, PHP 5.x as well as PHP 7.x.
Example
Following example calculates decimal equivalent of '100' and returns 256 −
<?php
$arg='100';
$val=hexdec($arg);
echo "hexdec(" . $arg . ") = " . $val;
?>Output
This will produce following result −
hexdec(100) = 256
Example
If the string contains invalid characters (other than 0-9 and a-f) they are ignored. Hence, in the string '2x5', 'x' is dropped and conversion of '25' is done which is 37. −
<?php
$arg='2x5';
$val=hexdec($arg);
echo "hexdec(" . $arg . ") = " . $val;
?>Output
This will produce following result −
hexdec(2x5) = 37
Example
If all character in string are non-hexadecimal, result is 0 −
<?php
$arg='PHP';
$val=hexdec($arg);
echo "hexdec(" . $arg . ") = " . $val;
?>Output
This will produce following result −
hexdec(PHP) = 0
Example
The hexdec() function treats the argument string contains unsigned integer and returns following result
<?php
$arg='-10';
$val=hexdec($arg);
echo "hexdec(" . $arg . ") = " . $val;
?>Output
This will produce following result −
hexdec(-10) = 16