How to convert hexadecimal and decimal to each other in php

Methods for mutual conversion: 1. Use the "hexdec (hexadecimal string)" statement to convert hexadecimal to decimal; 2. Use the "dechex (decimal value)" statement , can convert decimal to hexadecimal value; 3. Use the "base_convert("base value", original base, target base)" statement.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

16 hexadecimal and Conversion between decimal numbers

1. To convert hexadecimal numbers to decimal numbers

, you can use hexdec(hexdec) Hexadecimal string) function, which can convert hexadecimal numbers into decimal numbers.

<?php
echo hexdec("1e") . "<br>";
echo hexdec("a") . "<br>";
echo hexdec("11ff") . "<br>";
echo hexdec("cceeff");
?>

Output result:

You can also use the base_convert() function, just set "bindec(hexadecimal string, 16 , 10)" is enough.

<?php
echo base_convert("1e", 16, 10) . "<br>";
echo base_convert("a", 16, 10) . "<br>";
echo base_convert("11ff", 16, 10) . "<br>";
echo base_convert("cceeff", 16, 10);
?>

Output result:

30
10
4607
13430527

2. Convert decimal number to hexadecimal value

You can use dechex (decimal value) Function, which converts decimal numbers to hexadecimal numbers.

<?php
echo dechex("30") . "<br>";
echo dechex("10") . "<br>";
echo dechex("1587") . "<br>";
echo dechex("70");
?>

Output result:

You can also use the base_convert() function, just set "bindec(decimal value, 10, 16)" is all.

<?php
echo base_convert("30", 10, 16) . "<br>";
echo base_convert("10", 10, 16) . "<br>";
echo base_convert("1587", 10, 16) . "<br>";
echo base_convert("70", 10, 16);
?>

Output results:

1e
a
633
46

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