Happy Coders

The base_convert() function in PHP is used to convert numbers between different bases, such as binary, decimal, octal, or hexadecimal.
It accepts the number as a string, the base it’s in, and the base to convert to (ranging from 2 to 36).
The output is always a string, regardless of base.
Common uses include data encoding, binary/hex manipulation, and unique ID generation.
Example: base_convert("255", 10, 16) returns "ff".

Syntax

base_convert(string $number, int $from_base, int $to_base): string

• $number – The number you want to convert (as a string)
• $from_base – The base the number is currently in (2–36)
• $to_base – The base you want to convert to (2–36)
• Returns – The converted number as a string

File Name: base-convert-example.php

<?php
echo base_convert("15", 10, 2);     // ➤ "1111" (Decimal to Binary)
echo "\n";

echo base_convert("1111", 2, 10);   // ➤ "15" (Binary to Decimal)
echo "\n";

echo base_convert("255", 10, 16);   // ➤ "ff" (Decimal to Hex)
echo "\n";

echo base_convert("ff", 16, 10);    // ➤ "255" (Hex to Decimal)
?>

Real-World Use Cases