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# hexdec

(PHP 3, PHP 4 , PHP 5)

hexdec -- Hexadecimal to decimal

## Description

int hexdec ( string hex_string)

Returns the decimal equivalent of the hexadecimal number represented by the hex_string argument. hexdec() converts a hexadecimal string to a decimal number. The largest number that can be converted is 7fffffff or 2147483647 in decimal.

hexdec() will ignore any non-hexadecimal characters it encounters.

示範 1.hexdec() example
`<?php var_dump(hexdec("See")); var_dump(hexdec("ee")); // both print "int(238)" var_dump(hexdec("that")); // print "int(10)" var_dump(hexdec("a0")); // print "int(160)" ?>`

See also dechex(), bindec(), octdec() and base_convert().

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