How to convert hexadecimal string to number in php

php method to convert a hexadecimal string into a number: 1. Use the hexdec() function, the syntax is "hexdec (hexadecimal string)"; 2. Use the base_convert() function, the syntax is " bindec(hex string, 16, 10)".

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

In php, hexadecimal string conversion Numbers are to convert hexadecimal strings into decimal numbers. Let me introduce the method below.

Method 1: Use the hexdec() function

hexdec() function converts hexadecimal numbers to decimal numbers.

hexdec(hex_string);

Parameters	Description
hex_string	Required . Specifies the hexadecimal string to be converted.

• Return value: decimal value of hex_string.

You only need to insert the hexadecimal string that needs to be converted into the function.

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

Output result:

30
10
4607
13430527

Method 2: Use base_convert() function

base_convert() function to convert numbers between arbitrary bases.

base_convert(number,frombase,tobase);

Parameters	Description
number	Required . Specifies the number to be converted.
frombase	Required. Specifies the original base of the number. Between 2 and 36 (inclusive). Numbers above decimal are represented by the letters a-z, such as a for 10, b for 11, and z for 35.
tobase	Required. Specifies the base to be converted. Between 2 and 36 (inclusive). Numbers above decimal are represented by the letters a-z, such as a for 10, b for 11, and z for 35.

• Return value: number converted to the specified base.

You only need to set the first parameter of the function to the specified hexadecimal string, the second parameter to 16, and the third parameter to 10. Realize hexadecimal to decimal conversion.

<?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:

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