base_convert() function in PHP

The base_convert() function converts a number from one base to another, for example, octal number to decimal number. The base mentioned here should be between 2 and 36. Digits in numbers with a base greater than 10 are represented with the letters a-z, where a is 10, b is 11, c is 12, d is 13, and so on up to z which is 35.

Syntax

base_convert(num, original_base, to_base)

Parameters

• num − The number to convert (as a string)

• original_base − The original base of the number (between 2 and 36)

• to_base − The base to convert to (between 2 and 36)

Return Value

The base_convert() function returns a string representing the number converted to the desired base.

Example 1: Octal to Decimal

Converting an octal number to decimal ?

<?php
    $res = "0040";
    echo base_convert($res, 8, 10);
?>

32

Example 2: Hexadecimal to Octal

Converting a hexadecimal number to octal ?

<?php
    $res = "D365";
    echo base_convert($res, 16, 8);
?>

151545

Example 3: Binary to Hexadecimal

Converting a binary number to hexadecimal ?

<?php
    $res = "101101";
    echo base_convert($res, 2, 16);
?>

2d

Example 4: Using Higher Bases

Converting between bases higher than 10 using alphabetic characters ?

<?php
    // Convert base 36 to decimal
    echo base_convert("zz", 36, 10) . "<br>";
    
    // Convert decimal to base 36
    echo base_convert("1295", 10, 36);
?>

1295
zz

Conclusion

The base_convert() function is useful for converting numbers between different number systems. It accepts bases from 2 to 36 and returns the converted value as a string, making it ideal for various mathematical and programming applications.