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33 lines
697 B
PHP
33 lines
697 B
PHP
<?php
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/**
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* This function converts the
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* submitted Binary Number to
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* Decimal Number.
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*
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* Working of Algorithm
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* (10) base 2
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* (1 * (2 ^ 1) + 0 * (2 ^ 0)) base 10
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* (2 + 0) base 10
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* 2 base 10
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*
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* @param string $binaryNumber
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* @return int
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* @throws \Exception
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*/
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function binaryToDecimal($binaryNumber)
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{
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if (!is_numeric($binaryNumber)) {
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throw new \Exception('Please pass a valid Binary Number for Converting it to a Decimal Number.');
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}
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$decimalNumber = 0;
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$binaryDigits = array_reverse(str_split($binaryNumber));
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foreach ($binaryDigits as $index => $digit) {
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$decimalNumber += $digit * pow(2, $index);
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}
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return $decimalNumber;
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}
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