Binary to decimal conversion in php

Convert binary number into decimal number

Php program for Binary to decimal conversion. Here more solutions.

<?php
/*
  Php program for
  Convert binary to decimal number
*/
class DecimalNumber
{
	public	function binaryTodecimal($number)
	{
		// Assuming that number contains 0,1s
		// Used to store result
		$result = 0;
		$bit = 0;
		$n = strlen($number) - 1;
		// Display Binary number
		echo "Binary :  ".$number;
		// Execute given number in reverse order
		while ($n >= 0)
		{
			if ($number[$n] == '1')
			{
				// When get binary 1
				$result += (1 << ($bit));
			}
			$n = $n - 1;
			// Count number of bits
			$bit++;
		}
		// Display decimal result
		echo "  Decimal :  $result\n";
	}
	public static function main()
	{
		$task = new DecimalNumber();
		// Test Cases
		$task->binaryTodecimal("1111");
		$task->binaryTodecimal("10111");
		$task->binaryTodecimal("10101");
		$task->binaryTodecimal("1001");
		$task->binaryTodecimal("1101");
	}
}
DecimalNumber::main();

Output

Binary :  1111  Decimal :  15
Binary :  10111  Decimal :  23
Binary :  10101  Decimal :  21
Binary :  1001  Decimal :  9
Binary :  1101  Decimal :  13


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