bindec():Decimal equivalent of Binary string

$binary = '101101';
echo bindec($binary); // 45

echo bindec('1101'); // Output 13 
echo "<br>";
echo bindec('0101'); // Output 5 
echo "<br>";
echo bindec('10110'); // Output is 22
echo "<br>";
echo bindec('101101101'); // Output is 365
echo "<br>";
echo bindec('111011100'); // Output is 476
echo "<br>"; 

int|float bindec(string $binary);

Example: Binary to Decimal with Leading Zeros

$binary = "000101";
echo bindec($binary);  // Output: 5

Example: Large Binary Numbers

$binary = "110010101011011010";
echo bindec($binary);  // Output: 207610

Validate a binary string before conversion

$binary = "1011";
if (preg_match('/^[01]+$/', $binary)) {
    echo bindec($binary);  // Output: 11
}

Example: Binary Conversion with Spaces

$binary = "1010 0011";  // Spaces between bits
$binary_clean = str_replace(' ', '', $binary);  // Remove spaces
echo bindec($binary_clean);  // Output: 163

Example: Using bindec() with Binary String in Variable

$binary = "1001011";
$decimal = bindec($binary);
echo "Binary: $binary to Decimal: $decimal";  // Output: Binary: 1001011 to Decimal: 75

Example: Converting Binary Fractions

$binary = "101.101";
list($intPart, $fracPart) = explode('.', $binary);
$decimal = bindec($intPart) + bindec($fracPart) / pow(2, strlen($fracPart));
echo $decimal;  // Output: 5.625

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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